Computer Networking
For data communications to occur, the communicating devices must be part of a communication system made up of a combination of?

Hardware and software
Full duplex and half duplex
All of these
WAN and LAN

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
X.21 is

a method access control technique for multiple-access transmission media
a method of determining which device has access to the transmission medium at any time
network access standard for connecting stations to a circuit-switched network
None of these
a very common bit-oriented data link protocol issued by ISO

ANSWER DOWNLOAD EXAMIANS APP