CN important questions

Unit-1

-OSI Model
-TCP/IP Model
-Types of Addressing

Unit-2

-Write any 3 differences b/w virtual circuits & datagram subnets?

Unit-3

-CRC (theory and problems)
-Simplex stop & wait protocol
-Unrestricted simplex protocol
-Checksum problem (internet checksum also)

Unit-4

-HDLC
     Frame formats
-Explain Piggy Bagging
-Explain GoBack N protocol