计算机网络期末考试模拟试题
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一、选择题
1．IP belongs to ( ) layer?
A.transport
work
C.data link
D. physical 2．Which of the following is correct? ( )
A. No two adapters have the same MAC address.
B. MAC broadcast address is FF-FF-FF-FF-FF-FF.
C. A portable computer with an Ethernet card always has the same MAC address, no matter where the computer goes.
D. All of the above
3．How many bits specify the IP protocol version in a datagram? ( ).
A.1 bit
B.2 bits
C.4 bits
D.8 bits
4．In the following applications, which one is a loss-tolerant application?
A E-mail
B file transfer
C instant messaging
D real-time audio
5．The internet’s network layer provides a single service----that is ( ).
A. Reliable data transfer
B. Flow control
C. Congestion control
D.
Best-effort-service
6．The Internet mail system has three components which they are ( ).
er agent, SMTP, POP3
B.SMTP, POP3, IMAP
er agent, SMTP, IMAP
er agent, SMTP, mail server 7．DNS means ( ).
A.Data Name System
B.Data National System
C.Domain Name System
D.Domain National System 8．“233.1.1.0/24”, where the /24 notation, sometimes known as a ( ).
A. Subnet mask
B. Networking address
C. Host address
D. None of above
9．Port number’s scope is ( ) to ( ).
A. 0, 1023
B. 0, 65535
C. 0, 127
D. 0,255
10．“233.1.1.0/24”, where the /24 notation, sometimes known as a( ).
A. Subnet mask
B. Networking address
C. Host address
D. None of above
11．Which of the following is not intra-AS routing protocol? ( )
A. RIP
B. OSPF
C. IGRP
D.BGP 12．IP addressing assigns an address to 223.10.198.250/29, the network address for this network is ( ).
A.223.10.198.248
B. 223.10.198.250
C. 223.10.198.0
D.
223.10.0.0
13．IP Data-grams are rarely larger than ( ).
A. 1500 bytes
B. 65535 bytes
C.500 bytes
D.1024 bytes 14．Which of the following is correct? ( )
A. No two adapters have the same MAC address.
B. MAC broadcast address is FF-FF-FF-FF-FF-FF.
C. A portable computer with an Ethernet card always has the same MAC address, no matter where the computer goes.
D. All of the above
15．How many bits specify the IP protocol version in a datagram? ( ).
A.1 bit
B.2 bits
C.4 bits
D.8 bits
16．The maximum amount of data that can be grabbed and placed in a segment is limited by the( ).
A. Maximum segment size (MSS)
B. MTU
C. Checksum
D. Sequence number
17．There are 6 flag fields. Which one is to indicate that the receiver should pass the data to the upper layer immediately? ( )
A. PSH
B. URG
C. ACK
D. RST
18．ICMP is used for ( ).