Gigabit LAN connection

I am now connected with a gigabit connection to my ISP's LAN, that has around 1 thousand users in our area. 271mbit/s is the average I get (usually it is from 250 to 310). The signal goes 50m over copper Ethernet cat5e cable to a D-Link switch and then hops to a 24port gigabit switch over some more 100 metres of Cat5e cabling and then goes over a fiber connection to a 8port gigabit switch before arriving at the Debian-based server.