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Homework answers / question archive / Saudi Electronic University IT 210 CHAPTER 23 1)One of the main duties of the transport layer is to provide___communication
Saudi Electronic University
IT 210
CHAPTER 23
1)One of the main duties of the transport layer is to provide___communication.
A) node-to-node
B) host-to-host
C) process-to-process
D) None of the choices are correct
2 A client program normally uses port number. A server program normally uses port number.
A) a well-known; an ephemeral B) an ephemeral; a well-known C) a private; a well-known
D) None of the choices are correct
3 A socket address is a combination of . A) a MAC address and a logical address
B) a MAC address and a port number
C) a user-specific address and a logical address D) None of the choices are correct
4 means accepting items from more than one source. means delivering items to more than one source.
A) Demultiplexing; Multiplexing B) Multiplexing; Demultiplexing C) Encapsulation; Decapsulation D) Pulling; Pushing
5 means the producer delivers the items when they are produced. means the consumer takes the items when it is ready to do so.
A) Pushing; Pulling B) Pulling; Pushing
C) Forwarding; Accepting
D) None of the choices are correct
6 In the stop-and-wait protocol, the maximum send window size is and the maximum receive window size is , where m is the number of bits in
the sequence. A) 1; 1
B) 2m; 1
C) 1; 2m D) 2m ; 2m
7 In the Go-Back-N protocol, the maximum send window size is and the maximum receive window size is , where m is related to the number of
bits in the sequence number. A) 1; 1
B) 1; 2m
C) 2m − 1; 1
D) 2m − 1; 2m – 1
8 In the selective-repeat protocol, the maximum send window size is and the maximum receive window size is , where m is the number of bits
in the sequence. A) 1; 1
B) 1; 2m − 1
C) 2m − 1; 1
D) 2m − 1; 2m – 1
9 UDP is a _transport protocol. A) connectionless, reliable
B) connection-oriented, unreliable C) connectionless, unreliable
D) None of the choices are correct
10 UDP is an acronym for . A) User Delivery Protocol
B) User Datagram Procedure C) User Datagram Protocol
D) None of the choices are correct
11 At the transport layer, to define the processes, we need two identifiers called
.
A) logical addresses B) physical addresses C) port addresses
D) None of the choices are correct
12 The ports ranging from 0 to 1,023 are called the ports. The ports ranging from 1,024 to 49,151 are called ports. The ports
ranging from 49,152 to 65,535 are called the ports. A) well-known; registered; dynamic or private
B) registered; dynamic or private; well-known C) private or dynamic; well-known; registered D) private or dynamic; registered; well-known
13 UDP and TCP are two protocols at the layer. A) data-link
B) network C) transport
D) application
14 A port number is bits long. A) 8
B) 16 C) 32 D) 64
15 Communication at the transport layer is . A) node-to-node
B) end-to-end C) node-to-host D) host-to-node
16 In Go-Back-N, the values of Sf = 3 and Sn = 7, after receiving a packet with ackNo = 6, the value of Sf is .
A) 6 B) 7 C) 5
D) None of the choices are correct
17 In Go-Back-N, the values of Sf = 3 and Sn = 7, after receiving a packet with ackNo = 6, the value of Sn is .
A) 6 B) 7 C) 5
D) None of the choices are correct
18 In Go-Back-N, the values of Sf = 3 and Sn = 7, after receiving a packet with ackNo = 5, the window .
A) slides two slots B) slides one slot
C) slides three slots D) does not slide
19 In Selective Repeat, the values of Sf = 3 and Sn = 7, after receiving a packet with ackNo
= 5, the window . A) slides two slots
B) slides one slot C) slides three slots D) does not slide
20 In Selective Repeat, when a timeout occurs, the timer is . A) stopped
B) started
C) reset (stopped and started)
D) None of the choices are correct
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