G
LOSSARY
Glossary-8
User Datagram Protocol (UDP)
UDP provides a datagram mode for packet-switched communications. It
uses IP as the underlying transport mechanism to provide access to IP-like
services. UDP packets are delivered just like IP packets – connection-less
datagrams that may be discarded before reaching their targets. UDP is
useful when TCP would be too complex, too slow, or just unnecessary.
Virtual LAN (VLAN)
A Virtual LAN is a collection of network nodes that share the same
collision domain regardless of their physical location or connection point
in the network. A VLAN serves as a logical workgroup with no physical
barriers, and allows users to share information and resources as though
located on the same LAN.
XModem
A protocol used to transfer files between devices. Data is grouped in
128-byte blocks and error-corrected.
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