a2zinterviews

Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.

A communications protocol used to connect computers to remote networking services including Internet service providers.

Switching in data communication is of three types
• Circuit switching
• Packet switching
• Message switching

Analog signals can have an infinite number of values in a range but digital signal can have only a limited number of values.

ARP - Address resolution protocol is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a router to find the physical address of another host on its network by sending a ARP query packet that includes the IP address of the receiver.

RARP - Reverse address resolution protocol allows a host to discover its Internet address when it knows only its physical address.