Computer Networks Questions & Answers – 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
a) Propagation delay
b) Queuing delay
c) Transmission delay
d) All of the mentioned
Answer: d
Explanation: None.
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
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.
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
View Answer
a) Processing delay
b) Queuing delay
c) Transmission delay
d) All of the mentioned
View Answer
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
a) La/R
b) LR/a
c) R/La
d) None of the mentioned
Answer: a
Explanation: None.
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
a) 20Mbps
b) 10Mbps
c) 40Mbps
d) 50Mbps
Answer: b
Explanation: The throughput is generally the transmission rate of bottleneck link.
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
a) N/2
b) N
c) N-1
d) 2N
Answer: c
Explanation: None.
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
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.
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
a) Propogation delay
b) Queuing delay
c) Transmission delay
d) Processing delay
Answer: b
Explanation: None.
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
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
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
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.
Explanation: Propagation delay is the time it takes a bit to propagate from one router to the next.
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