Network Security Interview Subcategories

Freshers	Network Security Interview
Network Hardware	Experienced
Classful Addressing

A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the requirement to make this frame collision-free?

A. 2msec
B. 4msec
C. 2sec
D. 4sec

Explanation: Average frame transmission time Tfr = 200 bits/200 kbps or 1 ms Vulnerable time = 2x Tfr = 2 × 1 ms = 2 ms.

‘Jitter’ refers to-

A. Errorless delivery
B. Variation in the packet arrival time
C. Timely delivery of message
D. None of the mentioned

Explanation: ‘Jitter’ refers to variation in the packet arrival time.

2 Half duplex systems can make a Full-Duplex.

A. True
B. False
C.
D.

Explanation: The statement is true.

Which topology requires the most amount of wiring?

A. Mesh
B. Star
C. Bus
D. Ring

Explanation: This is the disadvantage of mesh topology.

How many links are there for N nodes in the mesh topology?

A. 1
B. N(n+1)/2
C. N
D. N(n-1)/2

Explanation: There are N(N-1)/2 links for N nodes.

Which topology has a central hub?

A. Mesh
B. Star
C. Bus
D. Ring

Explanation: The star topology has a single hub.

Which topology has the toughest fault identification?

A. Mesh
B. Star
C. Bus
D. Ring

Explanation: In the bus topology, fault identification is tougher.

Ethernet LANs use which topology?

A. Mesh
B. Star
C. Bus
D. Ring

Explanation: Ethernet LANs use bus topology,

Which topology uses the token passing algorithm?

A. Mesh
B. Star
C. Bus
D. Ring

Explanation: The ring topology uses the token passing algorithm. The token holder gets its turn at communication.

How many lines are required for the bus topology?

A. N(n-1)/2
B. N
C. N+1
D. None of the mentioned

Explanation: N drop lines and 1 bus line.