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提问人：网友bluebird3621 发布时间：2022-01-07

[主观题]

Networks can be interconnected by different devices. In the physical layer networks can be

connected by(31)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(32), examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process. In network layer, we have routers that can connect two networks. If two networks have(33)network layer, the muter may be able to translate between the 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(34). As an example, gateways between Internet e-mail and X.400 e-mail must(35)the e-mail message and change various header fields.

A．reapers

B．relays

C．packages

D．modems

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更多“Networks can be interconnected by different devices. In the physical layer networks can be”相关的问题

第1题

The Internet is a （) system of interconnected computer networks that use the standard Inte

The Internet is a () system of interconnected computer networks that use the standard Internet protocol suits(TCP/IP) to serve several billion users worldwide。

A．global B．regional C．local D．national

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第2题

From the passage, it can be referred that Elle Woods is ______.A．a very beautiful and inte

From the passage, it can be referred that Elle Woods is ______.

A．a very beautiful and intelligent girl

B．a good student of Harvard University

C．the heroine of an American comedy

D．an old sweetheart of Warner

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第3题

What can we learn from the passage？A．It is hard to tell how to protect the privacy of Inte

What can we learn from the passage？

A．It is hard to tell how to protect the privacy of Internet users.

B．Financial institutions cannot cope with criminal behavior.

C．Internet has thousand passwords.

D．Nobody knows your buying habits.

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第4题

The author believes that only when ______ can you take notes efficiently.A．you become inte

The author believes that only when ______ can you take notes efficiently.

A．you become interested in the fly buzzing on the windowpane

B．you pay your undivided attention on lectures

C．you are distracted by a peculiar habit of the lecturer's

D．you let your mind wander

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第5题

IKEA can cope with the diversity of its workforce because ______ .A．its managers have inte

IKEA can cope with the diversity of its workforce because ______ .

A．its managers have international experience

B．its basic corporate values are found in all cultures

C．its employees interpret IKEA beliefs differently

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第6题

It can be inferred from the last paragraph that _____. ［A］ the dream to build inte

It can be inferred from the last paragraph that _____.

［A］ the dream to build interplanetary Internet can be fulfilled in the future

［B］ interplanetary Internet will be commercialized in 100 years

［C］ the research of Internet took 50 years

［D］ it will take a long time to build interplanetary Internet

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第7题

According to the authors of Computers in Human Behavior,A.talking to strangers on the Inte

According to the authors of Computers in Human Behavior,

A.talking to strangers on the Internet can improve the mood

B.face-to-face talk can strengthen the bond between friends

C.people often feel closer to real-life friends than to net friends

D.teens feeling bad can benefit from talks via instant messaging

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第8题

What is said about CEOs in the third paragraph？A．They are above the average people in inte

What is said about CEOs in the third paragraph？

A．They are above the average people in intelligence.

B．They look down upon the ordinary people.

C．They are overly confident about their abilities as the others are.

D．They can do more mergers with their greater hubris.

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第9题

These networks are _______for warning signs that show the weakening of rock layers t

hat can precede an earthquake.

A、 in alert

B、 for the alert

C、 with the alert

D、 on the alert

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第10题

Which of the following networks can be used in schools ？

A.LAN

B.MAN

C.WAN

D.PAN

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第11题

Multipurpose Internet Mail Extension （MIME)is a（76)document messaging standard in the Inte

Multipurpose Internet Mail Extension (MIME)is a(76)document messaging standard in the Internet environment. With MIME, users can send(77)E-mail messages that include audio, video, graphices, and text to any other user of a TCP/IP network. Richtext information can also be(78)into messages. It defines the fonts, formats, and(79)features of a document so the document can be easily(80)on many different types of systems.

A．complete

B．compound

C．simple

D．efficient

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