Beginner's CCNA

Recently I started CCNA on American International University Bangladesh (AIUB). Although my first impression about CCNA was that it is a har...

A network consists of some network devices and their interconnection using some media like copper wire or optical fiber or wireless link. Th...

At the source end an application has data that is to be sent. It sends data to presentation layer and then to the session layer. Then the da...

The top layer at which human interacts with several applications. Some Application layer Protocols are DNS: resolves the website name into s...

It takes application layer data and. It enables more than one application to communicate simultaneously through the network and the data doe...

The network layer gets transport layer segment, adds ip address of source and destination and creates a PDU called packet. The ip address is...

The job of data link layer is divided into two sub-layers Logical Link Control (LLC): It communicates with the upper layer and finds the net...