Computer Networking
X.21 is

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

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
UDP is:

Connection orientated and reliable
Not a part of the TCP/IP suite
Connection oriented and unreliable
Connectionless and unreliable
None of these

ANSWER DOWNLOAD EXAMIANS APP