2021年1月23日发(作者：esna)
Computer Network Test Paper


1.

Who invented IP and some related Internet protocols?
B
a)

Vinton Cerf and Bob Metcalfe



b)

Vinton Cerf and Robert Kahn
c)

Bob Metcalfe and Ivan Sutherland
d)

Bob Metcalfe and David Clark

2.

In the OSI reference model,


3.

The
upper layers
of the OSI model are, in correct order
B
a)

Session, application, presentation
b)

Session, presentation, application
c)

Session, application, presentation, physical
d)

Application, presentation, session

4.

The
lower layers
of the OSI model are, in correct order
D
a)

physical, system, network, logical
b)

physical, logical, network, system
c)

physical, transport, network, data link
d)

physical, data link, network, transport

5.

The Internet Protocol (IP) generally corresponds to which OSI layer?

A
a)

Network (layer three)
b)

Transport (layer four)
c)

Data link (layer two)
d)

Session (layer five)

6.

MTU stands for

C
a)

Minimum Transfer Unit
b)

Minimum Transmission Unit
c)

Maximum Transmission Unit
d)

Maximum Transfer Unit

7.

What layer of the OSI model is designed to perform error detection functions?

B
a)

Physical
b)

Data link
c)

Network
d)

transport

8.

Which of these network devices primarily functions at the OSI Network layer (layer 3)?
a)

Switch
b)

Gateway
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C
c)

Router
d)

All of the above

9.

What is the size of today
’
s standard (IPv4) IP address?

a)

4 bytes (32 bits)
b)

12 bytes (96 bits)
c)

15 bytes (120 bits)
d)

16 bytes (128 bits)

10.

What is the size of the next- generation (IPv6) IP address?
a)

4 bytes (32 bits)
b)

12 bytes (96 bits)
c)

15 bytes (120 bits)
d)

16 bytes (128 bits)

11.

Which of the following higher-level protocols runs over IP?

a)

FTP
b)

HTTP
c)

SMTP
d)

All of the above

12.

Which of the following IPv4 addresses is the
loopbackaddress
?

a)

0.0.0.0
b)

10.0.0.1
c)

127.0.0.1
d)

255.255.255.255

13.

Which of the following IPv6 addresses is the loopback address?

a)

0::0
b)

0::1
c)

127::0
d)

127::1

14.

The length of an IP datagram header can vary
depending
on the options used.
What is the
smallest possible IP header size?

a)

16 bytes
b)

20 bytes
c)

24 bytes
d)

60 bytes

15.

The source IP address for an IPv4 datagram is stored where in the header?
a)

2nd longword (bytes 5-8)
b)

3rd longword (bytes 9-12)
c)

4rd longword (bytes 13-16)
C
B
B
C
D
A
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d)

5rd longword (bytes 17-20)

16.

The destination IP address for an IPv4 datagram is stored where in the header?

a)

2nd longword (bytes 5-8)
b)

3rd longword (bytes 9-12)
c)

4rd longword (bytes 13-16)
d)

5rd longword (bytes 17-20)

17.

The header length field in an IPv4 datagram contains the size
of an IP
header measured
in
number of
a)

Bits
b)

Bytes
c)

Longwords (4 bytes)
d)

None of the above

18.

Can IP run over any other physical networks besides Ethernet?

a)

No (and IP does not run over Ethernet)
b)

No
c)

Yes (but IP does not run over Ethernet)
d)

Yes

19.

What function does Address Resolution Protocol (ARP) perform?
a)

Converts IP addresses to Ethernet addresses
b)

Automatically assigns IP addresses to computers
c)

Prevents two computers from using the same IP address
d)

None of the above

20.

What mechanism does ARP use to resolve IP addresses?
a)

Mathematical formula
b)

Lookup table
c)

Central web site
d)

Random number generator

21.

Which utility program is designed to report whether a networked computer is responding at
a given IP address, and how long these responses take?
a)

traceroute
b)

ping
c)

ttcp
d)

netstate

22.

which
of
these
shell
commands
supplies
the
IP
address
of
a
computer
running
the
Linux
operating system?

a)

ipconfig
b)

ifconfig

B

B

B
A
D
C
D
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