ISRO2011-1

Question

The encoding technique used to transmit the signal in giga ethernet technology over  fiber optic medium is

• A. Differential Manchester encoding
• B. Non return to zero
• C. $\text{4B/5B}$ encoding
• D. $\text{8B/10B}$ encoding

Answer 1

$8B/10B$ encoding technique used to transmit the signal in giga ethernet technology over  fiber optic medium.

This layer describes the byte synchronization and the encode/decode scheme which transmits 8 bits as a 10-bit code group. The features of this scheme are low-cost component design and good transition density for easy clock recovery.

Check GIGABIT ETHERNET here.

So D is correct option.

Answer 2

for gigabit ethernet  encoding technique used is 8B/10B  and for standard ethernet it is manchester encoding

Answer 3

8B/10B.

8 Bit data converted into 10 bit data. 8B/10B is combination of 5B/6B and 3B/4B.