User's Manual

Glossary
126
TIA
Telecommunications Industry Association
Transmission Control Protocol/Internet Protocol (TCP/IP)
Protocol suite that includes TCP as the primary transport protocol, and IP as the
network layer protocol.
Universal Plug-and-Play (UPnP)
A set of protocols that allows devices to connect seamlessly and simplifies the
deployment of home and office networks, using auto-discovery of other network
devices, acquiring information about device capabilities, and requests for services.
UTP
Unshielded twisted-pair cable.
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.
Very high data rate Digital Subscriber Line (VDSL)
A family of digital telecommunications protocols designed to allow high speed data
communication at data rates from below 1 Mbps to 52.8 Mbps with corresponding
maximum reach ranging from 4500 feet to 1000 feet using 24 gauge twisted pair
cable over the existing copper telephone lines between end-users and service
providers.
Very high data rate Digital Subscriber Line 2 (VDSL2)
VDSL2 as defined in ITU-T Recommendation G.993.2 is an enhancement to the first
VDSL standard (G.993.1). It supports transmission at a bi-directional net data rate
(the sum of upstream and downstream rates) of up to 200 Mbps on twisted pair
cables using a bandwidth of up to 30 MHz.
Virtual Private Network (VPN)
A secure tunnel used to protect data passing from one network to another over the
Internet.
Wide Area Network (WAN)
A computer network that spans a relatively large geographical area. Typically, a
WAN consists of two or more local-area networks (LANs).