TRENDnet TEW-452BRP - 108Mbps Wireless Super G Broadband Router User Manual page 51

TCP/IP
TCP/IP (Transmission Control Protocol/Internet Protocol) is the main Internet
communications protocol. The TCP part ensures that data is completely sent and
received at the other end. Another part of the TCP/IP protocol set is UDP, which is used
to send data when accuracy and guaranteed packet delivery are not as important (for
example, in real-time video and audio transmission). The IP component of TCP/IP
provides data routability, meaning that data packets contain the destination station and
network addresses, enabling TCP/IP messages to be sent to multiple networks within
the LAN or in the WAN.
UDP
(User Datagram Protocol) is a protocol within TCP/IP that is used to transport
information when accurate delivery isn't necessary (for example, real-time video and
audio where packets can be dumped as there is no time for retransmitting the data).
Virtual Servers
Virtual servers are client servers (such as Web servers) that share resources with other
virtual servers (i.e., it is not a dedicated server).
WAN
WAN (Wide Area Network) is a communications network that covers a wide geographic
area such as a country (contrasted with a LAN, which covers a small area such as a
company building).
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