text on nine keys
TDD
Downstream
Usenet
UUCP
Uuencode
U interface
UHF
Undernet
Unicast
URL
Thicknet
Thickwire
Thinnet
Thinwire
Wake on LAN
WAN interface card
network analyzer
FTAM
wavelength
VTAM
universal network
Unshielded Twisted Pair
USSD
Zmodem protocol
zone
Graceful degradation
X server
X terminal
X.25
X.500
x2
XDMA
Xmodem
CRC-4
cross-bar switch
Token Ring
802.11a
CR
CPE
CPNI
CWDM
CWNP
CPS
cyclic redundancy checking
crossover cable
crosstalk
CSMA/CA
CSMA/CD
CSU/DSU
CTI
core router
corporate area network
supernetting
switched virtual circuit
Switched Multimegabit Data Service
signal
Signaling System 7
SIGTRAN
subcarrier
subnet
Service Location Protocol
Service Profile Identifier
session layer
set-top box
small form factor
Small form-factor pluggable
shielded twisted pair
SeniorNet
Sequenced Packet Exchange
Server Message Block Protocol
SCART connector
SCTP
SDI
SDMA
SDR
S interface
S-HTTP
signal-to-noise ratio
SAR
satellite Internet connection
satellite news gathering
satellite return Internet connection
reverse DNS
reverse Telnet
ring
RNIS
repeater
Resilient Packet Ring
response time
Reverse Address Resolution Protocol
red route
registered port numbers
RCA connector
Real-Time Transport Protocol
Quad FastEthernet
QAM
Queries-per-second
protocol
propagation delay


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