心情愉快计算机网络英文题库(附答案)chapter1

2021年1月27日发(作者：disable)
Chapter 1 Computer Networks and the Internet
B
low-altitude satellite

C
fiber optics

D
wireless LAN

1
．
The
( )
is
a
worldwide
computer
network,
that is, a network that interconnects
millions
of
computing
devices
throughout the world. ppt3

A
public
4
．
The
units
of
data
exchanged
by
a
link-layer protocol are called ( ).

Internet
A
Frames



B
Intranet

C
switch net

D
television net

2
．
Which
kind
of
media
is
not
a
guided
media
( )

A
twisted-pair
copper
wire


B
a coaxial cable

C
fiber
optics


D
digital satellite channel

3
．
Which kind of media is a guided media
( )

A
geostationary satellite

B
Segments

C
Datagrams

D
bit streams

5
．
Which of the following option belongs
to the circuit- switched networks ( )

A
FDM

B
TDM

C
VC networks

D
both A and B

6
．
( )makes sure that neither side of a
connection
overwhelms
the
other
side
by
sending too many packets too fast.

A
Reliable data transfer

B
Flow control

C
Congestion control

packet-switched
virtual-circuit
networks,
networks
and
are
circuit-switched networks.

D
Handshaking procedure

C
datagram networks use destination
7
．
( )
means
that
the
switch
must
receive
the entire packet before it can begin
addresses
and
virtual-circuit
networks
use
VC.
numbers
to
forward
packets
to
transmit
the
first
bit
of
the
packet
onto the outbound link.

A
Store-and-forward
transmission


B
FDM

C
End-to-end
connection


D
TDM

8
．
Datagram networks and virtual-circuit
networks differ in that ( ).

A
datagram
networks
are
circuit-switched
networks,
and
virtual-circuit
networks
are
packet-switched networks.

B
datagram
networks
are
toward their destination.

D
datagram networks use VC. numbers
and
virtual-circuit
networks
use
destination
addresses
to
forward
packets toward their destination.

9
．
In the following options, which one is
not a guided media ( )

A
twisted-pair
wire


B
fiber optics

C
coaxial cable
D
satellite

10
．
Processing
delay
does
not
include
the
time to ( ).


A
examine the packet
’
s header

packets
known
as
( )
from
one
host
to
B
wait
to
transmit
the
packet
onto
the
link

C
determine
where
to
direct
the
packet

D
check bit-error in the packet

11
．
In the following four descriptions,
which one is correct ( )

A
The
traffic
intensity
must
be
greater than 1.

B
The
fraction
of
lost
packets
increases
as
the
traffic
intensity
decreases.

C
If
the
traffic
intensity
is
close
to
zero,
the
average
queuing
delay
will
be
close to zero.

D
If
the
traffic
intensity
is
close
to
one, the average queuing delay will be
close to one.

12
．
The
Internet
’
s
network
layer
is
responsible for moving network-layer
another.

A
frame

B
datagram

C
segment

D
message

13
．
The protocols of various layers are
called ( ).

A
the
protocol
stack


B
TCP/IP

C
ISP

D
network protocol

14
．
There
are
two
classes
of
packet-switched
networks:
(


)
networks
and
virtual- circuit
networks.

A
datagram

B
circuit-switched

C
television


D
telephone

15
．
Access
networks
can
be
loosely
18
．
In
the
Internet,
the
equivalent
concept
to end systems is ( ).

A
hosts

classified
into
three
categories:
residential
access,
company
access
and ( ) access.

A
cabled

B
wireless

C
campus

D
city area

Question 16
～
17

Suppose,
a

is
the
average
rate
at
which
packets
arrive
at
the
queue,
R

is
the
transmission
rate,
and
all
packets
consist
of
L
bits, then the traffic intensity is
(
16
),
and
it
should
no
greater
than
(
17
).

16
．

A
LR
／
a


B
La
／
R

C
Ra
／
L


D
LR
／
a

17
．
A 2


B 1

C
0

D
-1

B
servers

C
clients

D
routers

19
．
In
the
Internet,
end
systems
are
connected together by ( ).

A
copper wire

B
coaxial cable

C
communication links

D
fiber optics

20
．
End
systems access to the
Internet
through its ( ).

A
modems

B
protocols

C
ISP

D
sockets

21
．
End
systems,
packet
switches,
and
other
pieces of the Internet, run ( ) that
control the sending and receiving of
information within the Internet.

D
WAN

23
．
The
internet
allows
( )
running
on
its
end
systems
to
exchange
data
with
each
other.

A
clients
applications
A
programs

B
processes

C
applications


D
protocols

22
．
There
are
many
private
networks,
such
as
many
corporate
and
government
networks,
whose
hosts
cannot
exchange
messages
with
hosts
outside
of
the
private
network.
These
private
networks
are
often
referred
to
as
( ).

A
internets

B
LAN

C
intranets



B
server applications

C
P2P
applications


D
distributed applications

24
．
The
Internet
provides
two
services
to
its
distributed
applications:
a
connectionless
unreliable
service
and
() service.

A
flow
control


B
connection- oriented reliable

C
congestion
control


D
TCP

25
．
It
defines
the
format
and
the
order
of
messages
exchanged
between
two
or
more
communicating
entities,
as
well
as
the
actions
taken
on
the
transmission
and/or receipt of a message or other
event. The sentence describes ( ).

D
the
transmission
signals
are
digital signals or analog signals

27
．
In the following
options, which is
defined in protocol ( )


A
the
actions
taken
on
the
A
Internet

B
protocol

C
intranet

D
network

26
．
In the following options, which does
not define in protocol ( )

A
the
format
of
messages
exchanged
between
two
or
more
communicating
entities

B
the
order
of
messages
exchanged
between
two
or
more
communicating
entities

C
the
actions
taken
on
the
transmission
of
a
message
or
other
event

transmission and/or receipt of a
message or other event

B the
objects
exchanged
between
communicating entities

C the
content
in
the
exchanged
messages

D the location of the hosts

28
．
In the following options, which does
not belong to the network edge ( )

A
end systems

B
routers

C
clients

D
servers

29
．
In
the
following
options,
which
belongs