1241. 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 above

1242. 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 them

1243. In the transfer of file between server and client, if the transmission rats along the path is 10Mbps, 20Mbps, 30Mbps, 40Mbps. The throughput is usually :

A. 20 Mbps
B. 10 Mbps *
C. 30 Mbps
D. 40 Mbps

1244. A congestion-free network exists if the end-to-end delay is given by dend-end= N(dproc + dtrans + dprop). The quantity of switches among source and objective is :

A. N/2
B. N
C. N-1 *
D. 2N

1245. 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. Propagation delay
B. Queuing delay *
C. Transmission delay
D. Processing delay

1246. Transmission delay does not depend on :

A. Packet lenght
B. Distance between the routers *
C. Transmission rate
D. None of the above

1247. Propagation delay depends on :

A. Packet lenght
B. Transmission rate
C. Distance between the routers *
D. None of the above

1248. The number of layers in internet protocol stack :

A. 5 *
B. 7
C. 6
D. None of the above

1249. The number of layers in ISO OSI reference model :

A. 5
B. 7 *
C. 8
D. None of the above

1250. This layer in an addiction to OSI model :

A. Application layer
B. Presentation layer
C. Session layer
D. Both B and C