Data Centre custom built facility for providing internet connectivity to racks of servers

Allocation of an IP address at connection from a 'pool' of available addresses. Also referred to as a Dynamic IP Address. DHCP assigned IP addresseshave a 'lease' whereby the address will be returned to the pool if unsused for the time specified.

System by which domain names (nice, friendly, easily remembered) are looked up by nameservers to get their IP Address (quad dotted numbers, unfriendly, not-so-easy to remember)

DSLAM equipment is located at the BT exchanges, and connects the exchange side of your telephone line to the ADSL service