converts digital signals to analog signals
converts analog signals to digital signals
is a modem capable of accepting commands
is a public access message system
Sibling
SIO
Sequence
Sentinel
LAN
WAN
MAN
VAN
Infinite loop
Sot
Data highway
Data traffic pattern
Transmitting computer
Receiving computer
A personal computer
All of these
Data link layer
Network layer
Transport layer
Session layer
Animation
Image
Text
Sound
Protocol
Hyperlink
Network
Internet
Modem
T-switch
Gateway
Multiplexer
Berkley software group
Bell labs
California University
American Defence Academy