IBPS IT SO- Computer Networks-Delays and Loss

Delays and Loss

1) Which of the following delay is faced by the packet in travelling from one end system to another ?
a) Propagation delay
b) Queuing delay
c) Transmission delay
d) All of the mentioned

Answer: d
Explanation: None.

2) For a 10Mbps Ethernet link, if the length of the packet is 32bits, the transmission delay is(in milliseconds)
a) 3.2
b) 32
c) 0.32
d) None of the mentioned

Answer: a
Explanation: Transmission rate = length / transmission rate = 32/10 = 3.2milli seconds.

3) The time required to examine the packet’s header and determine where to direct the packet is part of
a) Processing delay
b) Queuing delay
c) Transmission delay
d) All of the mentioned

Answer: a
Explanation: None.

4) Traffic intensity is given by, where L = number of bits in the packet a = average rate R = transmission rate
a) La/R
b) LR/a
c) R/La
d) None of the mentioned

Answer: a
Explanation: None.

5) In the transfer of file between server and client, if the transmission rates along the path is 10Mbps, 20Mbps, 30Mbps, 40Mbps. The throughput is usually
a) 20Mbps
b) 10Mbps
c) 40Mbps
d) 50Mbps

Answer: b
Explanation: The throughput is generally the transmission rate of bottleneck link.

6) If end to end delay is given by dend-end = N(dproc + dtrans + dprop) is a non congested network. The number of routers between source and destination is
a) N/2
b) N
c) N-1
d) 2N

Answer: c
Explanation: None.

7) The total nodal delay is given by
a) dnodal = dproc – dqueue + dtrans + dprop
b) dnodal = dproc + dtrans – dqueue
c) dnodal = dproc + dqueue + dtrans + dprop
d) dnodal = dproc + dqueue – dtrans – dprop

Answer: c
Explanation: None.

8) In a network, If P is the only packet being transmitted and there was no earlier transmission, which of the following delays could be zero
a) Propogation delay
b) Queuing delay
c) Transmission delay
d) Processing delay

Answer: b
Explanation: None.

9) Transmission delay does not depend on
a) Packet length
b) Distance between the routers
c) Transmission rate
d) None of the mentioned

Answer: b
Explanation: Transmission delay = packet length / transmission rate

10) Propagation delay depends on
a) Packet length
b) Transmission rate
c) Distance between the routers
d) None of the mentioned

Answer: c
Explanation: Propagation delay is the time it takes a bit to propagate from one router to the next.

All the best for your exams @Mission IT SO 2016