Physical Layer


Question 1
To send same bit sequence, NRZ encoding require
A
Same clock frequency as Manchester encoding
B
Half the clock frequency as Manchester encoding
C
Twice the clock frequency as Manchester encoding
D
A clock frequency which depend on number of zeroes and ones in the bit sequence
ISRO CSE 2020   Computer Network
Question 2
If there are n devices (nodes) in a network, what is the number of cable links required for a fully connected mesh and a star topology respectively
A
n(n-1)/2 , n-1
B
n, n-1
C
n-1, n
D
n-1, n(n-1)/2
ISRO CSE 2017   Computer Network


Question 3
In networking terminology UTP means
A
Uniquitous teflon port
B
Uniformly terminating port
C
Unshielded twisted pair
D
Unshielded T-connector port
ISRO CSE 2017   Computer Network
Question 4
Physical topology of FDDI is?
A
Bus
B
Ring
C
Star
D
None of the above
ISRO CSE 2017   Computer Network
Question 5
Bit stuffing refers to
A
inserting a 0 in user stream to differentiate it with a flag
B
inserting a 0 in flag stream to avoid ambiguity
C
appending a nipple to the flag sequence
D
appending a nipple to the use data stream
ISRO CSE 2016   Computer Network


There are 5 questions to complete.

5 thoughts on “Physical Layer”

  2. Question no. 18 and Question no. 24 are same question but your answer is different.
    I Think answer is 218 please correct it.

    Reply

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