Question:

(a) Show by means of a diagram the Ethernet frame structure and describe the six fields of the Ethernet frame structure.

(b) Explain the operation of the Carrier Sense Multiple Access/Collision Detection (CSMA/CD) contention technique used by Ethernet.

(c) Explain the characteristics of CSMA/CD in terms of:

i. Order of transmission.
ii. Length of wait time before transmission takes place.
iii. Network saturation.
iv. Capture effect.

(d) What is the purpose of the terminator at each end of a bus in a bus topology.

(e) Explain the operation of a Token Ring topology for a LAN. Your answer should include

i. A description of the token passing process.
ii. The specific IEEE standard.
iii. The problems inherent with a ring topology.