LAN or ethernet cables connection slots operational mode.
10/100 MB.s is the standard speed characteristic of almost all the routers.
10/100/1000 MB.s, or GigaBit is tens of times faster standard which, in combination of GigaBit LAN network cards, provides great data transmission speed advantages between computers connected within the internal network. This solution is usually required in offices where large data volumes are copied between computers or fast Internet connection is used (no ~30 MB/s) simultaneously in several computers.