Computer Networking
The CCITT Recommendation X.25 specifies three layers of communications:

Session, transport and network
None of these
application, presentation and session
datalink, network and transport
physical datalink and network

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
ICMP (Internet Control Message Protocol) is

a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol that handles error and control messages
None of these
a TCP/IP high level protocol for transferring files from one machine to another
a protocol used to monitor computers

ANSWER DOWNLOAD EXAMIANS APP

Computer Networking
The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

can receive and send data simultaneously
cannot talk at once
can send or receive data one at a time
can do one way data transmission only
None of these

ANSWER DOWNLOAD EXAMIANS APP