Computer Networking
Bulletin board system

is a modem capable of accepting commands
converts analog signals to digital signals
converts digital signals to analog signals
None of these
is a public access message system

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is never less expensive than flat-rate service
None of these
is always less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short

ANSWER DOWNLOAD EXAMIANS APP