My NIC supports gigabit ethernet:
$ ethtool eth0Settings for eth0: Supported ports: [ MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 1 Transceiver: external Auto-negotiation: on Supports Wake-on: g Wake-on: d Link detected: yesMy question in other words: I don't know the LAN I am connected to is whether a fast or gigabit ethernet. It could very well be gigabit ethernet and all that time I would have been using only 100 mbps instead of 1 gbps. But since I am connected to LAN with a CAT5e cable (I don't possess a CAT6 cable), is there any way to tell?
