All the users in a lan have trouble communicating with the mail server. As a network engineer, what are the troubleshooting steps to be followed?
1. Application 2. Session 3. Network 4. Data link
Repeater:also called a regenerator, it is an electronic device that operates only at physical layer. It receives the signal in the network before it becomes weak, regenerates the original bit pattern and puts the refreshed copy back in to the link.Bridges: these operate both in the physical and data...
Dns uses udp for communication between servers. It is a better choice than tcp because of the improved speed a connectionless protocol offers. Of course, transmission reliability suffers with udp.