通道（channel）

以下各消息中不是用Traffic channel来传输的是（）。

A:ECAM（Extended Channel Assignment Messag B:ESCAM（Extended Supplemental Channel Assignment Messag C:PSMM（PilotStrength Measurement Messag D:HDM（Handoff Direction Messag

根据以下的配置，请判断当主接口serial0出故障后，哪一个备份接口最先被启用。（）
Quidway（config-if-Serial0）#backup interfaceserial130
Quidway（config-if-Serial0）#backup interfaceserial240
Quidway（config-if-Serial0）#backup logic-channel350
Quidway（config-if-Serial0）#backup logic-channel235

A:serial1 B:serial2 C:logic-channel2 D:logic-channel3

告警“BTS2 BTS1 Cell traffic Loss of all channel VPMAENFLT、IT”，其中表示Alarmclass的是？Alarmtype的是？（）

A:Cell traffic B:Loss of all channel C:VPMA D:FLT、IT

TV Programmes
Channel(频道)	Channel 2
18:00 Around China	17:35 Computers Today
18:40 Children’s programme	18:05 Foreign Arts
19:00 News	18:30 English Classroom
19:35 Weather Report	19:10 Animal World
19:40 Around the World	19:35 China ’06
20:05 TV play: Sisters	20:20 Sports
21:00 English for Today	21:00 TV play: Guo Lanying
21:20 Classical Music	21:50 English News
21:55 Talk Show	22:10 On TV Next Week

You are interested in Classical Music, so you can watch TV at （）

A:21:20 on Channel 1    B:21:00 on Channel 2    C:18:05 on Channel 2

TV Programmes
Channel(频道)	Channel 2
18:00 Around China	17:35 Computers Today
18:40 Children’s programme	18:05 Foreign Arts
19:00 News	18:30 English Classroom
19:35 Weather Report	19:10 Animal World
19:40 Around the World	19:35 China ’06
20:05 TV play: Sisters	20:20 Sports
21:00 English for Today	21:00 TV play: Guo Lanying
21:20 Classical Music	21:50 English News
21:55 Talk Show	22:10 On TV Next Week

You are a football fan (球迷). You may watch TV at （）

A:20:20 on Channel 2 B:21:00 on Channel 1    C:22:10 on Channel 2

To swim across the English Channel takes at least nine hours. It’s a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes (as only as you’re not held up at the airport), but it’s an expensive way to travel. You can travel by hovercraft if you don’t mind the noise, and that takes forty minutes. Otherwise you can go by boat, if you dreams of being able to drive to France in his own car. "Not possible", you say. Well wait a minute. People are once again considering the idea of a Channel tunnel or bridge.
This time, the Greater London Council is looking into the possibility of building a Channel link straight to London. A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only.
Why is this idea being discussed again Is Britain becoming more conscious of the need for links with Europe as a result of joining the EEC (欧共体) Well, perhaps. The main reason, though, is that a tunnel or bridge would reach the twenty square kilometers of London’s disused dockland(船坞地). A link from London to the continent would stimulate trade and re-vitalize(使…重新具有活力)the port, and would make London a main trading center in Europe. With a link over the Channel, you could buy your fish and chips in England and be able to eat them in France while they were still warm!

Which of the following statements is TRUE（　）

A:Swimming across the Channel takes less than four hours. B:The idea of a Channel tunnel or bridge is a very new one. C:It is considered to be more difficult to swim across the channel than any other means. D:A tunnel or bridge would only reach as far as the coast.

To swim across the English Channel takes at least nine hours. It’s a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes (as only as you’re not held up at the airport), but it’s an expensive way to travel. You can travel by hovercraft if you don’t mind the noise, and that takes forty minutes. Otherwise you can go by boat, if you dreams of being able to drive to France in his own car. "Not possible", you say. Well wait a minute. People are once again considering the idea of a Channel tunnel or bridge.
This time, the Greater London Council is looking into the possibility of building a Channel link straight to London. A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only.
Why is this idea being discussed again Is Britain becoming more conscious of the need for links with Europe as a result of joining the EEC (欧共体) Well, perhaps. The main reason, though, is that a tunnel or bridge would reach the twenty square kilometers of London’s disused dockland(船坞地). A link from London to the continent would stimulate trade and re-vitalize(使…重新具有活力)the port, and would make London a main trading center in Europe. With a link over the Channel, you could buy your fish and chips in England and be able to eat them in France while they were still warm!
Which of the following statements is TRUE

A:Swimming across the Channel takes less than four hours. B:The idea of a Channel tunnel or bridge is a very new one. C:It is considered to be more difficult to swim across the channel than any other means. D:A tunnel or bridge would only reach as far as the coast.

Typically, these are concern with the establishment of （） the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of （） interface between user(application)program, normally referred to, as application processes or APs, and the underlying communication services may be （） For example, one computer may be a small single -user computer, while another may be a large （） system. In the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s Systems Network.
Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples of Communication software packages produced by manufacturers to allow their systems to be int erconnected together. These proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem, （） , in the late 1970s, formulated a reference model to provide a common basis ( or the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one another.

Typically, these are concern with the establishment of （） the network and with the control of the flow of messages across this channel.

A:communication channel access B:protocols C:data channel D:public communication