Ethernet switch buying guide: match port count and speed to the network you already have
Engadget's buying guide says a home network short on Ethernet ports usually needs a switch, not another router, and that port count, speed, management features and PoE budget should be matched to existing gear.
The guide warns that switch shopping becomes complicated quickly, with five-port and eight-port models, Gigabit and multi-gig options, and managed switches carrying settings most users will never open. Choosing the box with the largest numbers does not guarantee the best fit, it says; the better approach is to pick a switch that accommodates the existing network and leaves room for future devices.
Port count is the simpler decision, though there is a catch. On a five-port switch, one port typically connects the switch to the router, leaving four for other devices. A household that needs four additional ports immediately is directed toward an eight-port model, which leaves room for seven devices.
Speed requires more thought. Engadget says a 1GbE switch is reasonable when the internet connection, router and wired devices all top out at Gigabit speeds. A 2.5GbE switch makes more sense with multi-gig internet, a newer PC with 2.5GbE networking or a fast NAS, and it avoids paying for 10GbE hardware that is not needed.
The guide stresses that the switch should not become the bottleneck. If a router has a 2.5Gbps port and the switch is limited to 1GbE, traffic between the two is capped at 1GbE. The reverse also holds: plugging a 1GbE device into a 2.5GbE switch does not make that device faster.
Internet speed is not the whole picture. Two 10GbE-capable devices on the same 10GbE switch can move files across the local network far faster than an internet plan allows, which the guide says can matter for large NAS backups or video files. It also notes that 2.5GBASE-T can run over existing Cat5e cabling, so moving beyond Gigabit does not necessarily require rewiring a house.
For many homes, an unmanaged switch is sufficient. These add ports without any configuration: plug one into the router, connect the devices and stop there. Managed and smart switches generally cost more and offer greater control, including virtual LANs, traffic monitoring, quality-of-service controls and tools for separating or managing devices. Engadget describes these as useful for complex home networks but unnecessary for users who would never open the settings page.
Power over Ethernet is another feature to weigh. PoE carries power and data over the same Ethernet cable, which the guide says is especially helpful for security cameras and Wi-Fi access points. Port count alone is not enough to judge a PoE switch, because each model has an overall power budget; a unit with several PoE ports may lack the wattage to run all connected devices at maximum power at once. Buyers are advised to check what their devices need, what each port can supply and the total budget available across the switch.
Physical details also matter. A small fanless switch will blend in next to a TV or on a desk, while larger models with active cooling are better tucked away with the rest of a household's networking gear.