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Most KVM switches move a keyboard, a mouse, and a monitor between two machines; the best KVM switches handle that job well and leave networking to a separate cable. Add Ethernet to the requirement list and the field collapses fast — not because RJ45 ports are rare, but because the port on the back of a KVM rarely behaves the way buyers assume it does.
The assumption is usually "one uplink, both computers stay online." What actually ships falls into three distinct architectures: a KVM that keeps both hosts wired at the same time, a KVM whose network connection follows whichever computer is selected, and — rare, and mostly historical — a KVM with a genuine Ethernet switch built into the chassis. Those three behave differently enough that the wrong pick will drop a VPN session, break a DHCP reservation, or quietly leave one machine offline until you power-cycle the hardware.
This guide ranks ten Ethernet-capable KVM switches by what their network path actually does, not by whether the spec sheet says "Gigabit LAN sharing." Along the way it covers MAC identity on corporate networks, the USB bandwidth that Ethernet shares with every other peripheral on the hub, and the real difference between EDID emulation and genuine USB device persistence.
It is built for anyone running two laptops, a laptop and a desktop, or several desktops on one monitor-and-peripheral set — and who needs the wired connection to survive the switch every single time.
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Quick Picks
- Best 2.5GbE: AV Access iDock B12 — the only verified faster-than-Gigabit entrant, with both hosts wired simultaneously.
- Best Thunderbolt-class: TESmart HDC202-X24 — manufacturer documentation explicitly describes a built-in network switch serving both PCs at up to 1000Mbps.
- Best for two laptops: AV Access iDock C20 — one cable per laptop, 1GbE to both regardless of which is selected, plus EDID emulation.
- Best triple-monitor hybrid: AV Access iDock B23 — a USB-C laptop and a desktop on three displays with shared 1GbE.
- Best four-host: TESmart DKS402-M24 — four desktops, dual DisplayPort, and shared 1GbE with independent USB/audio focus lock.
- Best for triple-display desktops: AV Access iDock D23 — three DisplayPort monitors on two machines with 1GbE to both.
- Best single-monitor HDMI 2.1: TESmart HKS201-M24 — 8K60-class video and a 1000Mbps network card.
- Best two-laptop value: AV Access KD-E20 — 1GbE to both laptops at a lower tier, with a documented sleep caveat.
- Best active-follow NIC with Wake-on-LAN: StarTech 129N-USBC-KVM-DOCK — the cleanest example of Ethernet that moves with KVM focus.
- Best legacy true switch: IOGEAR GCS1774 — the only shortlisted unit with an actual 5-port Ethernet switch inside; discontinued, used-market only.
What Makes a Great KVM Switch with Ethernet?
The single most important question is not how fast the port is. It is what happens to the link when you press Switch. Manufacturers use "shared Ethernet," "LAN sharing," and "network hub" almost interchangeably, and those phrases resolve into three very different topologies.
Simultaneous host networking. Both computers stay attached to the same wired connection while display and USB focus changes. A background download, an SSH session, or a remote desktop keeps running on the machine you are not actively using. Every AV Access iDock and KD model in this roundup is documented this way, and so are the TESmart HKS201-M24, DKS402-M24, and HDC202-X24. Note the careful wording: this proves both hosts can remain networked. It does not prove the chassis contains a conventional Layer-2 switch ASIC, and vendors generally do not publish the internal silicon, so treat "simultaneous networking" as a behavior, not an architecture diagram.
Active-follow NIC. The dock exposes one network adapter, and that adapter belongs to whichever computer is selected. StarTech's 129N-USBC-KVM-DOCK is the clearest example: its own setup documentation states the displays, USB peripherals, and LAN connection toggle between PC1 and PC2. The inactive host loses the wired link entirely, which terminates wired-only VPNs and makes background reachability impossible.
Independent Ethernet switch. Each computer has its own connection to a real multi-port switch inside the chassis, so KVM focus has no bearing on networking at all. The IOGEAR GCS1774 is the only product in this roundup that does this, and it is long discontinued — but it is worth understanding precisely because almost every modern "Ethernet KVM" is something else.
Three further distinctions separate a KVM that works from one that wastes your afternoon.
MAC identity. A KVM-attached USB Ethernet interface is not the same thing as your motherboard NIC. TESmart ships a MAC-address programming utility and warns that its built-in adapter can present a placeholder address, with programming performed per input-port group. StarTech offers MAC Address Pass-Through so the active host's identity carries through. Either way, DHCP reservations, NAC device registration, and switch-port security policies may need to be revisited before deployment.
USB bus contention. Ethernet on these devices is a USB network adapter, and it competes for the same upstream USB link as displays, storage, webcams, and audio. A "5Gbps USB" host connection is not five independent 5Gbps buses; it is one shared pipe. This is why the iDock B12's 10Gbps host path matters next to its 2.5GbE port, and why 1GbE products with 5Gbps host links deserve a second look if you also run external drives. The same bandwidth arithmetic applies across the category — it is covered in more depth in the Ethernet dock roundup.
EDID vs. USB persistence. These are two different problems that get conflated constantly. EDID emulation keeps a monitor logically present to the inactive computer and cuts down on window rearrangement. It does nothing for a switched webcam, SSD, DAC, or the USB NIC itself — those still disconnect and re-enumerate. And EDID has a downside: with it active, an idle machine can keep believing a display is attached.
Finally, know what is out of scope. A KVM-over-IP device uses Ethernet to transport remote keyboard, video, and mouse management; that RJ45 port does not give the controlled PC ordinary shared LAN. A Cat5 KVM extender uses RJ45 cabling for KVM transport to receiver units, which is not host networking either. And a normal dock with an Ethernet port but no host switching is a different product category. If the definitions are still fuzzy, the KVM explainer covers the underlying mechanics.
One important note on the market: no current budget-tier 1GbE local-video KVM with genuinely integrated host-shared Ethernet stands out as a reliable option. Cheap listings in that band are overwhelmingly USB-only sharing switches or Cat5 extenders wearing an "Ethernet" badge. The last entry in this roundup fills a legacy niche rather than a modern budget one.
#1 AV Access iDock B12 — Best 2.5GbE Ethernet KVM
Specs
- Hosts: one full-featured USB-C laptop plus one desktop
- Ethernet: 2.5GbE, documented as shared between laptop and desktop
- Video out: 1× HDMI 2.1 + 1× DisplayPort 2.0 (UHBR 13.5)
- Display ceilings: desktop up to dual 8K60 / 4K165-class; laptop dual 4K60 or single 4K120, plus ultrawide high-refresh modes
- USB: laptop upstream USB 3.2 Gen 2 at 10Gbps; downstream mix of 10Gbps and 5Gbps USB-C/USB-A ports
- Charging: up to 100W to the USB-C laptop
- EDID emulation: no
- Switching: panel button + included wired remote
- Audio/cards: 3.5mm combo jack, SDXC reader
- Power: external 20V/6A adapter
- Positioning: premium
Why it leads
2.5GbE is the headline, and it is the reason this sits at the top of an Ethernet-first roundup rather than buried under an "8K" badge. AV Access documents the faster link as available to both the USB-C and the desktop side simultaneously, which matters for exactly the workloads that make people hunt for this category in the first place: large repository clones, NAS transfers, and VM images moving over the wire while you work on the other machine.
The 10Gbps host path gives the 2.5GbE NIC real headroom. A 2.5GbE adapter needs more than a congested 5Gbps pipe to hit its ceiling, and the B12 is the only product here with that margin documented. Everything else shares a 5Gbps-class USB link with its video and peripheral traffic.
Two caveats are worth knowing before you commit. There is no EDID emulation, so the inactive computer will see its monitor disappear and may reshuffle windows on switch-back. And availability is limited — the manufacturer page has shown "in stock" alongside a pre-order button and a shipping estimate, so treat it as a limited or pre-order product rather than a shelf item.
The Ethernet controller is not published, and AV Access does not name the internal switching topology. That is a documentation gap, not evidence of a problem, but it means there is no independent test confirming PHY link renegotiation, DHCP behavior, or 802.1X continuity across a switch event on this specific model.
Perfect for: buyers who need faster-than-Gigabit wired networking on both machines and can accept pre-order availability plus manual window management.
#2 TESmart HDC202-X24 — Best Thunderbolt-Class Ethernet KVM
Specs
- Hosts: one Thunderbolt 4/3-compatible laptop plus one conventional desktop
- Ethernet: 1GbE, explicitly described in the model FAQ as a built-in network switch serving both PCs at up to 1000Mbps
- Network control: the USB network function can be disabled by hotkey
- Host 1: a single Thunderbolt connection carries display, shared USB/network, and up to 60W charging
- Host 2: HDMI + DisplayPort video plus a USB host connection
- Video: dual HDMI 2.0 outputs, up to dual 4K60; also 1440p120, 3440×1440 at 100Hz, and 1080p240
- USB: 10Gbps USB 3.2 Gen 2 plus 5Gbps ports, with a dedicated keyboard/mouse path
- Charging: approximately 60W to the laptop
- EDID emulation: yes, per input
- Switching: panel, IR remote, hotkey, mouse-wheel
- Audio: 3.5mm USB audio
- Positioning: premium
Why it earns second place
This is the strongest documented answer to the core question of the roundup. TESmart's own model FAQ states the HDC202-X24 contains a built-in network switch that lets both connected PCs use one Gigabit Ethernet connection at up to 1000Mbps. That is as close to an explicit vendor confirmation of simultaneous networking as this category produces, and it is why this unit is the safer recommendation than an AV Access model if your deployment paperwork requires manufacturer language rather than inference.
The hybrid topology is the other attraction. One Thunderbolt cable carries display, shared USB, network, and charging to the laptop; the desktop arrives over DisplayPort, HDMI, and a USB host cable. That is a genuinely tidy desk for a mixed workstation. Note the asymmetry: the extra 40Gbps Thunderbolt port serves PC1 only and does not follow the switch.
The laptop charging tops out around 60W, so a 100W-class mobile workstation will not see its fastest charge rate here. TESmart's product page has also historically described the unit as Thunderbolt 4 compatible rather than resting on a stated Intel certification, so do not assume certification unless you re-verify it at purchase. Independent review coverage of this model found the 1GbE, connectivity, EDID, and internal cooling to be credible, with the price noted as a significant hurdle rather than any networking defect.
Perfect for: a Thunderbolt laptop plus a desktop that must both stay on wired Ethernet, where documented vendor language about the network path matters.
#3 AV Access iDock C20 — Best Ethernet KVM for Two Laptops
Specs
- Hosts: two USB-C laptops, one cable each
- Ethernet: 1GbE; AV Access states both laptops receive wired networking regardless of which is selected
- Network controller: reported as a Realtek USB GbE Family Controller in Windows
- Video: two HDMI 2.0 outputs, up to dual 4K60; also 1440p144 and 1080p240/165; HDCP 2.2
- USB: 5Gbps host data path; downstream USB-C 5Gbps, two USB 3.x 5Gbps, four USB 2.0-class ports, SDXC
- Charging: 60W to each connected laptop
- EDID emulation: yes, specifically to reduce flicker and desktop/icon rearrangement
- Switching: panel button; wired remote depends on bundle
- Audio: 3.5mm
- Dimensions: approximately 168 × 47.4 × 110 mm
- Power: external 20V/10A supply
- Positioning: premium
Why it is the default two-laptop pick
For a pair of USB-C laptops, this is the configuration most people picture: one cable per machine, one monitor pair, one keyboard and mouse, one Ethernet uplink, and both laptops wired at once. AV Access documents the 1GbE link as available to both hosts irrespective of KVM selection, and the EDID emulation means the inactive laptop should not rearrange its desktop every time you switch away.
The Realtek USB GbE adapter is confirmed through support materials rather than marketing copy. That matters because it tells you what class of device you are managing — a USB network interface, not a discrete NIC — and it frames the one real caveat in this model. A corporate HP EliteBook user reported random wired-network disconnects while running VPN, with AV Access support tracing the conversation to the Realtek USB GbE adapter and driver behavior. A separate user reported occasional whole-USB-C disconnect events, and a USB headset case cleared up after disabling Windows USB hub power management. The lesson is not that the C20 is broken; it is that "both hosts stay networked" and "the USB NIC can never misbehave" are different claims, and the second one is not guaranteed by any manufacturer in this category.
Windows relies on DisplayPort Alt Mode and MST for the dual 4K60 layout. On macOS, the two MST outputs generally mirror rather than extend, which is a host-side limitation rather than a dock defect — a distinction covered in more detail in the dual-monitor KVM roundup.
Perfect for: two USB-C laptops on one desk that both need to stay on wired Ethernet, with the fewest cables and the least window rearrangement.
#4 AV Access iDock B23 — Best Triple-Monitor Laptop and Desktop Hybrid
Specs
- Hosts: one USB-C laptop plus one desktop
- Ethernet: 1GbE, documented as serving both PCs with uninterrupted network access during switching
- Video: triple-monitor output; desktop side up to 8K60 / 4K165-class, laptop side up to two 4K60 plus a third 4K30 depending on host capability
- Video inputs: HDMI 2.1 and DisplayPort-class high-bandwidth paths
- USB: laptop host up to 10Gbps; desktop host up to 5Gbps; downstream mix of 10Gbps and 5Gbps ports plus SD
- Charging: up to 100W to the USB-C laptop
- EDID emulation: no
- Switching: front button + included wired controller
- Audio: 3.5mm
- Power: external 20V/6A adapter
- Dimensions: approximately 168 × 55 × 110 mm
- Positioning: premium
Why it is here
Three displays plus a shared wired link across a laptop and a desktop is a narrow but real need, and the B23 is the most direct current answer. The desktop side keeps its own high-bandwidth display paths — 8K60 and 4K165-class — while the laptop arrives over a single USB-C connection that carries video, USB, network, and up to 100W of charging.
The 10Gbps laptop host path is a step above the 5Gbps designs, which helps when the shared 1GbE NIC, USB peripherals, and display compression are all drawing on the same link. The desktop host path, however, is 5Gbps-class, so do not assume symmetric bandwidth across the two machines.
The absence of EDID emulation is the tradeoff you are accepting at this tier and feature set. AV Access support has stated that EDID cannot simply be added to this design through a firmware update because of its display-path constraints, so this is a hardware-level characteristic rather than a pending fix. If seamless window restoration matters more than the third display, the C20 or the HDC202-X24 are the better fits.
Perfect for: a laptop-plus-desktop desk driving three monitors where the laptop is the high-bandwidth machine.
#5 TESmart DKS402-M24 — Best Four-Host Ethernet KVM
Specs
- Hosts: four desktop computers
- Ethernet: 1GbE shared across the attached systems
- Video: two DisplayPort 1.4 displays, up to 8K60 and dual 4K144-class modes depending on host and display; HDR10 and Dolby Vision, VRR with G-Sync and FreeSync
- USB: four USB 3.2 Gen 1 5Gbps peripheral ports plus dedicated keyboard/mouse-class paths
- Charging: none
- EDID emulation: yes
- Focus lock: USB and audio focus can be pinned independently from video
- Switching: keyboard hotkeys, mouse wheel, IR remote, panel controls
- Audio: integrated 3.5mm audio and microphone
- Power: 12V adapter
- Positioning: premium
Why it is the four-host pick
Four computers sharing one wired link and two displays is a laboratory, test-bench, or multi-machine developer scenario, and there is very little competition here. Each host needs two DisplayPort video connections plus a USB connection, which is why the box ships with eight DisplayPort cables and four USB 3.0 cables — budget the cabling before you budget the chassis.
The focus lock is the feature that quietly earns its keep. On a conventional KVM, every switch disconnects and re-enumerates the shared USB tree, which means a DAC, a capture device, or a storage volume disappears and comes back. Pinning USB and audio to one host while video moves elsewhere removes that disruption from the parts of the workflow that cannot tolerate it.
Because this is a recent model, model-specific networking reports are thin. The relevant deployment risk is TESmart's broader USB-Ethernet and MAC-identity behavior, which is worth reading in the criteria section above before you put this on a corporate network. Each host-side USB connection is 5Gbps-class, so Gigabit LAN and other shared USB traffic occupy the same order of bandwidth rather than having independent paths.
Perfect for: four-machine test benches and multi-host workstations that need one wired uplink and independent USB/audio focus.
#6 AV Access iDock D23 — Best for Triple-Display Desktop PCs
Specs
- Hosts: two desktop PCs
- Ethernet: 1GbE; AV Access states both PCs share it with uninterrupted internet access during switching
- Network controller: reported as a Realtek USB GbE Family Controller in support material
- Video: three DisplayPort monitors; DP 2.0 and HDCP 2.3-class support; up to 8K60 and 4K165
- USB: 5Gbps-class host/hub plus USB-C, USB 2.0, and SD expansion
- Charging: none
- EDID emulation: no
- Switching: panel, keyboard hotkey, optional wired remote
- Audio: 3.5mm
- Power: external 12V/3A adapter
- Positioning: premium
Why it is here
Two desktop towers, three DisplayPort monitors, one shared wired link. Each computer needs three DisplayPort video paths plus a USB host connection, and the box includes six 1.5m DP 1.4a and two 1.8m USB cables — enough to cable both machines without a separate order.
The D23 is also the most useful reality check in this roundup. One user reported that both computers normally had internet access, but that switching could occasionally leave the Windows machine offline until the whole unit was restarted, while the Mac side stayed connected. That single report is the clearest available illustration of an important point: "both hosts have simultaneous NICs" and "the network can never disappear during a switch" are not the same claim, and no manufacturer in this category documents the stronger one.
EDID is absent here too, and AV Access support has stated it cannot be added through firmware on this design. Monitor rearrangement on switch-back is the practical consequence.
Perfect for: two desktop workstations driving three DisplayPort monitors, where a brief network hiccup on switch is an acceptable risk rather than an outage.
#7 TESmart HKS201-M24 — Best Single-Monitor HDMI 2.1 Ethernet KVM
Specs
- Hosts: two desktop PCs, one HDMI monitor
- Ethernet: built-in 1000Mbps network card
- MAC handling: TESmart provides a MAC-address programming utility; documentation warns the KVM's USB Ethernet adapter can present a default MAC such as 00:00:00:00:00:00, programmed per input-port group
- Video: HDMI 2.1, up to 8K60 and high-refresh modes using DSC; ADI 7674 HDMI decoding; VRR, FVA, and ALLM support
- USB: USB 3.2 Gen 1 5Gbps-class shared hub
- Charging: none — this is a desktop KVM
- EDID emulation: yes, marketed as smart EDID
- Switching: hotkey, front button, mouse-wheel switching, IR remote
- Audio: shared audio support
- Power: 12V external supply
- Positioning: premium
Why it is the single-monitor pick
If your Ethernet KVM only has to drive one HDMI display, this is the highest-bandwidth option on the list: HDMI 2.1 with DSC for 8K60-class and high-refresh modes, plus VRR and ALLM support that matters if the display is also a gaming panel.
The genuinely distinctive finding here has nothing to do with speed. TESmart's LAN-KVM support tooling exposes Realtek USB GbE adapters and provides a MAC-address programming utility, and the documentation explicitly warns that a KVM's built-in USB Ethernet adapter can ship with a placeholder MAC. On a home network that rarely matters. On a corporate network with DHCP reservations, NAC device registration, or switch-port security, a duplicate or unprogrammed MAC can produce exactly the kind of intermittent connectivity problem that gets misattributed to the KVM's hardware.
That is a deployment instruction, not a defect — but it is the kind of detail that separates a KVM that works the first time from one that generates a ticket. Budget a few minutes with TESmart's utility before you deploy.
Perfect for: two desktop PCs on one high-refresh HDMI display with a single wired uplink, especially where HDMI 2.1 bandwidth is the priority.
#8 AV Access KD-E20 — Best Value Two-Laptop Ethernet KVM
Specs
- Hosts: two USB-C laptops
- Ethernet: 1GbE; official documentation states the LAN works with both USB-C laptops simultaneously, including while the other computer is selected
- Video: two HDMI 2.0b outputs, up to dual 4K60 when host DP 1.4/MST capability permits; HDCP 2.2
- USB: three USB-A 5Gbps, one USB-C 5Gbps, two USB 2.0, SD
- Charging: up to 100W per laptop through separate charging inputs; the laptop PD supplies are distinct from the KVM's own 12V/3A adapter
- EDID emulation: yes — with the side effect that the inactive computer can continue to believe the monitors are present
- Switching: panel + wired remote
- Audio: 3.5mm
- Dimensions: approximately 220 × 25.2 × 100 mm
- Positioning: mid
Why it is the value pick
This delivers the same core capability as the C20 — two laptops, one cable each, simultaneous 1GbE to both — at a lower tier, with EDID emulation included. The tradeoff is power architecture: the KD-E20's own 12V/3A adapter runs the switch, and laptop charging comes through separate USB-C PD chargers rather than from a single beefy supply. If your desk already has adequate chargers, that is a reasonable concession.
The documented weakness is specific and worth repeating. AV Access support publishes a Windows issue in which USB power saving after sleep can cause the USB network adapter to malfunction or become unrecognized, with the recommended fix being to disable the relevant USB battery and power-saving settings. In other words, the Ethernet can vanish after a laptop wakes up, and the remedy is a Windows power configuration change rather than an RMA.
Wider community reports mention Linux and EDID resolution behavior, slow boot or display restoration, and at least one Thunderbolt 5 laptop video-compatibility failure after firmware work. And one user complaint — that the inactive laptop still sees a display — is not a bug at all. It is EDID emulation doing exactly what it is designed to do, and it is a useful reminder that the feature cuts both ways depending on your workflow. Broader multi-display configurations on this tier are covered in the triple and quad monitor dock roundup.
Perfect for: two-laptop setups that want simultaneous wired networking and EDID emulation without moving to a top-tier price bracket.
#9 StarTech 129N-USBC-KVM-DOCK — Best Active-Follow NIC with Wake-on-LAN
Specs
- Hosts: two USB-C laptops
- Ethernet: 10/100/1000 GbE with explicit Wake-on-LAN support
- Network architecture: active-follow — displays, USB peripherals, and the LAN connection toggle between PC1 and PC2
- Controller: Realtek RTL8211F Ethernet PHY, alongside DisplayLink, Genesys, and Parade components
- MAC handling: MAC Address Pass-Through available through StarTech Connectivity Tools
- Video: dual DisplayPort 1.4 outputs up to dual 4K60 via DisplayLink
- USB: USB 3.2 Gen 2 10Gbps host link; two 10Gbps USB-A, one 10Gbps USB-C, plus low-speed keyboard/mouse-class ports
- Charging: 90W to the active host / 45W to the standby host
- Switching: front pushbutton plus hotkeys and software features
- Audio: separate 3.5mm speaker and microphone
- Dimensions: approximately 223.8 × 90 × 39.9 mm
- Warranty: 3 years
- Positioning: premium
Why it is on the list
This is the counter-example, and it belongs in any honest roundup because it is the cleanest product for teaching the distinction buyers most often miss. StarTech's own setup documentation says the LAN connection toggles between PC1 and PC2 along with the displays and USB peripherals. The inactive host does not have the dock's wired NIC. If your workflow depends on a wired-only VPN session surviving on the machine you are not using, this design cannot deliver it.
What it does deliver is documented Wake-on-LAN — the only modern shortlisted model here with explicit WoL support — and MAC Address Pass-Through, which lets corporate networks see the active host's identity rather than a fixed dock MAC. Note the honest limitation: StarTech does not explicitly guarantee that an inactive host can receive a magic packet while its LAN is toggled away, so treat WoL as a feature of the selected machine.
The other thing to understand is that the video path is DisplayLink, not native GPU output. That means a software dependency on macOS, including Screen Recording permission for DisplayLink Manager, and a different display-state model than a direct-video KVM. In exchange you get dual 4K60 on base Apple Silicon, which native MST will not provide. If you want the native-video alternative, see the built-in KVM dock roundup.
Perfect for: two USB-C laptops where only the active machine needs wired networking, and where Wake-on-LAN plus MAC pass-through matter more than simultaneous connectivity.
#10 IOGEAR GCS1774 — Best Legacy True Ethernet Switch
Specs
- Hosts: four computers, one VGA display
- Ethernet: a genuine 5-port 10/100 Ethernet switch built into the chassis
- Networking behavior: each computer has its own switch connection; changing KVM focus does not make another host's Ethernet adapter appear or disappear
- MAC/DHCP: each host keeps its own native network identity rather than sharing one active USB adapter
- Video: VGA/SVGA up to 2048×1536
- USB: USB 2.0 hub at 480Mbps
- Charging: none
- Emulation: legacy keyboard, mouse, and video emulation only
- Switching: front buttons and hotkeys, with independent KVM, USB, and audio focus
- Audio: integrated audio sharing
- Power: external 5.3V adapter
- Status: officially end-of-life; used and refurbished units on the secondary market
- Positioning: budget / legacy
Why it is worth including
Because it is the only product in this roundup with a literal Ethernet switch inside it. IOGEAR's documentation specifies a built-in 5-port 10/100 switch, which means each connected computer keeps its own native NIC identity and its own switch port. KVM focus has no relationship to networking whatsoever — no USB Ethernet adapter, no re-enumeration, no shared pipe between Ethernet and peripherals.
As a modern recommendation it is a non-starter, and it should be stated plainly: VGA, USB 2.0, and 100Mbps networking are three generations behind. Its value here is as a reference point. Once you have seen what a real switched Ethernet path looks like, the marketing phrase "Gigabit LAN sharing" stops being reassuring and starts being a question. For anyone who cannot accept the compromises of USB Ethernet inside a KVM, the closest modern equivalent is to run a conventional KVM alongside a separate small network switch — two boxes, but two boxes that each do one job properly.
Perfect for: retro and legacy four-machine benches, or anyone who wants to understand the architecture that modern "Ethernet KVMs" replaced.
Comparison Table
| Product | Hosts | Ethernet topology | Ethernet speed | Max displays | Host charging | Positioning |
|---|---|---|---|---|---|---|
| AV Access iDock B12 | 1 USB-C laptop + 1 desktop | Simultaneous | 2.5GbE | Dual (desktop); dual 4K60 laptop | 100W | Premium |
| TESmart HDC202-X24 | 1 TB laptop + 1 desktop | Simultaneous — vendor-documented built-in switch | 1GbE | Dual 4K60 | ~60W | Premium |
| AV Access iDock C20 | 2 USB-C laptops | Simultaneous | 1GbE | Dual 4K60 | 60W per laptop | Premium |
| AV Access iDock B23 | 1 USB-C laptop + 1 desktop | Simultaneous | 1GbE | Triple | 100W | Premium |
| TESmart DKS402-M24 | 4 desktops | Simultaneous / shared | 1GbE | Dual, up to 4K144-class | None | Premium |
| AV Access iDock D23 | 2 desktops | Simultaneous | 1GbE | Triple DisplayPort | None | Premium |
| TESmart HKS201-M24 | 2 desktops | Shared / simultaneous | 1GbE | Single, up to 8K60 | None | Premium |
| AV Access KD-E20 | 2 USB-C laptops | Simultaneous | 1GbE | Dual 4K60 | 100W per laptop (separate chargers) | Mid |
| StarTech 129N | 2 USB-C laptops | Active-follow NIC | 1GbE | Dual 4K60 (DisplayLink) | 90W active / 45W standby | Premium |
| IOGEAR GCS1774 | 4 computers | Independent Ethernet switch | 10/100Mbps | Single VGA | None | Budget / legacy |
Which KVM Switch with Ethernet Should You Buy?
If you need faster-than-Gigabit networking on both machines: the AV Access iDock B12 is the only verified 2.5GbE option, and its 10Gbps host path gives the faster NIC the headroom to breathe. Accept the pre-order availability and the lack of EDID.
If vendor documentation has to say the word "switch": the TESmart HDC202-X24 is the model whose own FAQ describes a built-in network switch serving both PCs at up to 1000Mbps. It is also the tidiest single-cable laptop topology here.
If you run two USB-C laptops: the iDock C20 is the default — one cable each, simultaneous 1GbE, EDID emulation, and 60W to both. If the tier matters more than the power architecture, the KD-E20 gets you the same core capability with the documented sleep caveat.
If you mix a laptop and a desktop: the iDock B23 handles three displays with a high-bandwidth laptop path and a lower-bandwidth desktop path. The HDC202-X24 is the alternative if the desktop stays on one monitor.
If you run four machines: the TESmart DKS402-M24 is the only four-host option here, and its USB/audio focus lock is what keeps peripherals from re-enumerating on every switch.
If only the active machine needs the wire: the StarTech 129N is the honest choice, and the only one with documented Wake-on-LAN and MAC Address Pass-Through. Just do not expect the inactive laptop to stay on Ethernet.
If you want more general desk-expansion context before committing: the docking stations for two computers piece covers the wider two-machine workflow that these KVMs slot into.
Frequently Asked Questions
Q: Does a KVM switch with Ethernet keep both computers online at the same time?
On most current models in this roundup, yes — AV Access documents simultaneous networking on the B12, C20, KD-E20, B23, and D23, and TESmart documents it on the HKS201-M24, DKS402-M24, and HDC202-X24. The exception is StarTech's 129N-USBC-KVM-DOCK, whose LAN connection follows KVM focus and leaves the inactive host without the dock's wired NIC. Always confirm the topology rather than the presence of an RJ45 jack.
Q: What is an active-follow NIC and why does it matter?
An active-follow NIC is a single network adapter that belongs to whichever computer the KVM currently has selected. Switching the KVM logically disconnects it from the previous host and reconnects it to the new one. It matters because it terminates wired-only VPN sessions on the machine you leave, prevents a background download from continuing over the wire, and usually means the inactive host cannot be reached over that interface. StarTech documents this behavior explicitly on the 129N.
Q: Is a KVM switch the same as a KVM-over-IP device?
No. A KVM-over-IP device uses its Ethernet port to transport remote keyboard, video, and mouse management over a network, so an administrator can control a machine from elsewhere. That RJ45 port is not host networking and does not give the controlled PC ordinary shared LAN. Cat5 and RJ45 KVM extenders are a third distinct category: they use Ethernet-style cabling purely to carry KVM signals to receiver units further away.
Q: Why does my wired VPN drop when I switch computers?
If your KVM uses an active-follow NIC, the network adapter moves with focus and the previous host loses its wired link — which is enough to kill a wired-only VPN. If your KVM uses simultaneous networking but exposes the LAN through a USB Ethernet adapter, the link is still subject to USB-NIC behavior: AV Access support documents real-world disconnects on a Realtek USB GbE adapter under VPN, and a separate documented case where the USB network adapter fails after Windows sleep unless USB power-saving is disabled.
Q: Do I need to worry about MAC addresses with a KVM switch?
On a home network, usually not. On a corporate network with DHCP reservations, NAC device registration, or switch-port security, yes. TESmart ships a MAC-address programming utility and warns that its built-in USB Ethernet adapter can present a placeholder MAC such as 00:00:00:00:00:00, programmed per input-port group. StarTech offers MAC Address Pass-Through so the active host's identity carries through instead. Validate MAC behavior against your network policy before deployment.
Q: Is EDID emulation the same as keeping USB devices connected?
No, and this is one of the most common misunderstandings in the category. EDID emulation keeps a monitor logically present to the inactive computer and reduces window and icon rearrangement. It does nothing for a switched webcam, external SSD, audio interface, or the USB Ethernet adapter itself — those still disconnect and re-enumerate on every switch. A model like the TESmart DKS402-M24 adds a separate USB/audio focus lock precisely because EDID alone does not solve peripheral persistence.
Q: Can I use a Cat5 KVM extender as Ethernet passthrough?
No. An extender's RJ45 ports carry KVM transport between a transmitter and a receiver unit, not general host networking. The same confusion applies in the other direction: a normal dock with an Ethernet port but no host switching is not a KVM, and a USB-only sharing switch has no video path at all.
Q: Why can't I find a cheap KVM switch with real Ethernet?
Because the category is small. No current budget-tier 1GbE local-video KVM with genuinely integrated host-shared Ethernet stands out as a reliable option. Listings in that price band are overwhelmingly USB-only sharing switches, Cat5 KVM extenders, or single-host docks whose Ethernet serves one computer. The IOGEAR GCS1774 is the only true independent-switch design in this roundup, and it is discontinued and limited to 100Mbps.
Conclusion
Ethernet on a KVM switch is not a single feature — it is a choice between three architectures with very different consequences. Simultaneous host networking, which every AV Access iDock and KD model plus three TESmart units implement, is what most buyers actually want: both machines stay wired while keyboard, mouse, and displays move. An active-follow NIC, as on the StarTech 129N-USBC-KVM-DOCK, delivers Wake-on-LAN and MAC pass-through at the cost of wireless-only reachability on the idle machine. And a genuine independent Ethernet switch, as in the discontinued IOGEAR GCS1774, remains the architecture nobody currently builds.
If you want one recommendation, it depends on your hosts. The AV Access iDock B12 is the fastest verified option at 2.5GbE with a 10Gbps host path, provided pre-order availability and manual window management are acceptable. The TESmart HDC202-X24 is the safest choice when vendor language about an integrated network switch needs to appear in writing. The AV Access iDock C20 remains the most balanced two-laptop pick, with simultaneous 1GbE, EDID emulation, and 60W to each machine.
Whichever you choose, budget time for the two details that generate the most support tickets: MAC identity on managed networks, and the USB power-management settings that decide whether your wired link survives a laptop waking from sleep.
- Best KVM Switches (2026): Complete Buying Guide
- Best KVM Switches for Two Computers, One Setup (2026)
- Best Docking Stations with Built-In KVM Switch (2026)
- Best Docking Stations & Hubs with Ethernet Ports (2026)
→ Check the current price of the AV Access iDock C20 on Amazon
