BCA Semester 5 – Computer Networking – Unit 3: The Data Link Layer (8Hrs)

Explain how slotted Aloha improves the performance of system over pure Aloha. A bit stream of 100101010 is transmitted using CRC method. The generator polynomial is $x³ + 1.$Show the actual bit string transmitted and if fourth bit from LSB is altered, show the error detection in receiver side.

Explain the mechanism of bit and byte stuffing with suitable example.

Explain the ALOHA with its performance.