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Telnet
Teletype Network Protocol. A network protocol used on the Internet or local area networks to provide bidirectional interactive communications. Enables system users to log in and use resources on remote networks.
TFTP
Trivial File Transfer Protocol. Uses User Data Protocol (UDP) without security features to transfer files.
Trap
A message sent by the SNMP that indicates that system event has occurred.
Trunking
Link Aggregation. Optimizes port usage by linking a group of ports together to form a single trunk (aggregated groups).
U
UDP
User Data Protocol. Transmits packets but does not guarantee their delivery.
Unicast
A form of routing that transmits one packet to one user.
V
VLAN
Virtual Local Area Networks. Logical subgroups with a Local Area Network (LAN) created via software rather than defining a hardware solution.
W
WAN
Wide Area Networks. Networks that cover a large geographical area.
Wildcard Mask
Specifies which IP address bits are used, and which bits are ignored. A wild card mask of 255.255.255.255 indicates that no bit is important. A wildcard of 0.0.0.0 indicates that all the bits are important.