单选题An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes

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单选题

An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway? 空白（4）处应选择（）

destination

resource

packet

source

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第1题：

● An internet is a combination of networks connected by （71） . When a datagram goes from a source to a （72） , it will probably pass many （73） until it reaches the router attached to the destination network. A router receives a （74） from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available （75） is the optimum pathway?

（71）

A. modems

B. routers

C. switches

D. computers

（72）

A. user

B. host

C. city

D. destination

（73）

A. destinations

B. routers

C. packets

D. computers

（74）

A. destination

B. resource

C. packet

D. source

（75）

A. pathways

B. routers

C. diagrams

D. calls

正确答案：B,D,B,C,A

第2题：

The connection between two networks to form. an internet is handled by a machine known as a ______．

A．bridge

B．client

C．router

D．switch

正确答案：C
解析：答案C路由，是用来链接两个网络，并使其实现互联的设备。

第3题：

● The connection between two networks to form. an internet is handled by a machine known as a （71） .

（71）

A．bridge

B．client

C．router

D．switch

正确答案：C
试题（71）分析
答案C路由，是用来链接两个网络，并使其实现互联的设备。
参考答案
（71）c

第4题：

When computers are connected on a network in a manner where the data flows to a central pointand then back out describes which of the following networks?()

A.Ring

B.Mesh

C.Star

D.Hybrid

参考答案：C

第5题：

Networks can be interconnected by different devices in the physical layer networks can be connected by (71) or hubs．which just move the bits from one network to an identical network．One layer up we find bridges and switches which operate at data link layer．They can accept (72) ，examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer，we have routers that can connect two networks，If two networks have (73) network layer，the router may be able to translate betweenthe packer formats．In the transport layer we find transport gateway，which can interface between two transport connections Finally，in the application layer，application gateways translate message (74) ．As an example，gateways between Internet e-mail and X，400 e-mail must (75) thee-mail message and change various header fields．

(68)

A．reapers

B．relays

C．packages

D．modems

正确答案：A

第6题：

An internet is a combination of networks connected by()

A.modems

B.routers

C.switches

D.computers

正确答案：B

第7题：

A market may also be virtual, which is connected by phones on Internet.

A．Right

B．Wrong

C．Doesn't say

正确答案：A
解析：第一段第四句指出A market may be organized over wide areas connected through phones or computer terminals，通过电话和电脑终端方式运行的市场就是虚拟(virtual)市场。

第8题：

The Internet is a ()system of interconnected computer networks that use thestandard Internet protocol suite (TCP／IP) to serve several billion users worldwide.

A.global

B.regional

C.local

D.national

参考答案：A
本题翻译为：因特网是一种连通的计算机网络的（）系统，该网络使用标准因特网协议系列来为全世界数十亿用户提供服务。A.全球的B.局部的C.本地的D.国家的根据因特网的定义，是一种全球性的服务，选A。

第9题：

An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pass many (73) until it reaches the router attached to the destination network．A router receives a (74) from a network and passes it to another network．A router is usually attached to several networks．When it receives a packet，to which network should it pass the packet? The decision is based on optimization： Which of the available (75) is the optimum pathway?

A．modems

B．routers

C．switches

D．computers

正确答案：B

第10题：

Which of the following networks would MOST likely require EGP routing?()

A. Networks that use OSPF in addition to static routes

B. Networks with classless Internet domain routing

C. Networks with multiple ISPs

D. Networks that use encryption

参考答案：C

An internet is a combination of networks connected by (1). W

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