UDP (User Datagram Protocol) A communications method that uses the Internet Protocol (IP) to send a data unit (called a datagram) from one computer to another in a network. Network applications that have very small data units to exchange may use UDP rather than TCP.
unicast The
UTC (universal time coordinated) A standard reference time. UTC is based on an atomic resonance, and clocks that run according to UTC are often called “atomic clocks.”
VPN (Virtual Private Network) A network that uses encryption and other technologies to provide secure communications over a public network, typically the Internet. VPNs are generally cheaper than real private networks using private lines but rely on having the same encryption system at both ends. The encryption may be performed by firewall software or by routers.
WAN (wide area network) A network maintained across geographically separated facilities, as opposed to a LAN (local area network) within a facility. Your WAN interface is usually the one connected to the Internet.
wildcard A range of possible values for any segment of an IP address.
WINS (Windows Internet Naming Service) A name resolution service used by Windows computers to match client names with IP addresses. A WINS server can be located on the local network or externally on the Internet.
zone transfer The method by which zone data is replicated among authoritative DNS servers. Slave DNS servers request zone transfers from their master servers to acquire their data.
Glossary
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