Is a router considered a host on the network?
Some definitions say "any device with an IP address is a host," and routers obviously have IP addresses on their interfaces. So is a router a host or not?
1 Answer
No. A host is an endpoint — it originates or consumes user data: PCs, phones, servers, printers. A router is infrastructure: it forwards other devices' traffic and doesn't originate user data (management traffic like SSH to the router is the exception, not its role). The "has an IP = host" shortcut breaks exactly here: router interfaces carry IPs so they can participate in Layer 3, but their job is transit. This distinction matters practically when you count usable host addresses in a subnet — the router's interface consumes one of them (usually the first or last), which is why a "60 hosts" requirement really needs 61+ addresses once you include the gateway.