Planet GS-5220 Series User Manual page 565

encryption algorithm. TKIP comprises the same encryption engine and RC4 algorithm defined for WEP.
The key used for encryption in TKIP is 128 bits and changes the key used for each packet.
U
UDP
UDP is an acronym for User Datagram Protocol. It is a communications protocol that uses the Internet
Protocol (IP) to exchange the messages between computers.
UDP is an alternative to the Transmission Control Protocol (TCP) that uses the Internet Protocol
(IP). Unlike TCP, UDP does not provide the service of dividing a message into packet datagrams,
and UDP doesn't provide reassembling and sequencing of the packets. This means that the
application program that uses UDP must be able to make sure that the entire message has
arrived and is in the right order. Network applications that want to save processing time because
they have very small data units to exchange may prefer UDP to TCP.
UDP provides two services not provided by the IP layer. It provides port numbers to help
distinguish different user requests and, optionally, a checksum capability to verify that the data
arrived intact.
Common network applications that use UDP include the Domain Name System (DNS),
streaming media applications such as IPTV, Voice over IP (VoIP), and Trivial File Transfer
Protocol (TFTP).
UPnP
UPnP is an acronym for Universal Plug and Play. The goals of UPnP are to allow devices to connect
seamlessly and to simplify the implementation of networks in the home (data sharing, communications,
and entertainment) and in corporate environments for simplified installation of computer components
User Priority
User Priority is a 3-bit field storing the priority level for the 802.1Q frame.
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User's Manual of GS-5220 LCD Series
565