智慧树知道计算机网络原理-智慧树-知到-题库零氪网课答案

日期:2022-06-25 15:33:04

绪论

1、本课程采用“自顶向下”的方式讲解计算机网络原理。

第一章测试

1、The web server is not an end system?

2、The upper layers of the OSI model are ( )in correct order.
    A、Session,application,presentation
    B、Session,presentation,application
    C、Session,application,presentation,physical
    D、Application,presentation,session

3、The lower layers of the OSI model are ( )in correct order.
    A、physical,system,network,logical
    B、physical,logical,system,network
    C、physical,transport,network,data link
    D、physical,data link,network,transport

4、The Internet Protocol (IP) generally corresponds to which OSI layer?
    A、Network(layer three)
    B、Transport(layer four)
    C、Data link(layer two)
    D、Session(layer five)

5、Which of these network devices primarily functions at the OSI Network layer(layer 3)?
    A、Switch
    B、Gateway
    C、Router
    D、All of the above

第二章测试

1、TCP is an application layer protocol.

2、Which is not an application layer protocol? ( )
    A、HTTP
    B、ARP
    C、FTP
    D、DNS

3、The only architecture of applications is peer-to-peer.

4、In the client-server architecture, the clients is not always on.

5、Mail server port number is ( )
    A、25
    B、80
    C、403
    D、81

第三章测试

1、The POP3 protocol runs over ____ and uses port ____.
    A、TCP 110
    B、UDP 110
    C、UDP 25
    D、TCP 25

2、____ is most used for error reporting.
    A、UDP
    B、SMTP
    C、FTP
    D、ICMP

3、In the following options, which does not use UDP?
    A、Internet phone
    B、video conferencingS
    C、streaming multimedia
    D、telnet

4、Internet transport-layer protocols include TCP,IP and UDP.

5、TCP sender perceive congestion through a timeout event or a receiving duplicate ACK-s event.

第四章测试

1、RARP protocol translates IP addresses into MAC addresses.

2、The PING command is implemented by the ICMP echo request/reply.

3、An IP address consists of a network number field and a host number field.

4、The main task of the Internet’s Domain Name System (DNS) is to:
    A、Translate port numbers to IP addresses
    B、Specify the standards for Internet domain names
    C、Provide an authority for registering domain names
    D、Translate mnemonic(记忆的) names to IP addresses

5、The Internet’s network layer is responsible for moving network-layer packets known as ( ) from one host to another.
    A、frame
    B、datagram
    C、segment
    D、message

第五章测试

1、MAC address is unique in the world.

2、A 16-port switch,each port is 10/100M full-duplex adaptive,then bus bandwidth of the switch is ( )
    A、10M
    B、100M
    C、1.6G
    D、3.2G

3、The switch receives a frame whose targe address cannot be found in its MAC address table,then switch will do ( )
    A、discard
    B、send back
    C、flooding
    D、forward

4、What is true of the ARP table in the following description is?
    A、reduce network traffic
    B、mapping of IP address to MAC address
    C、routing selection
    D、error detection

5、Which layer does the switch work on?
    A、link layer
    B、network layer
    C、transport layer
    D、application layer

第六章测试

1、There are two address fields in 802.11 frame.

2、What are the type of wireless networks?
    A、Single hop, infrastructure-based
    B、Single hop, infrastructure-less
    C、Multi-hop, infrastructure-based
    D、Multi-hop, infrastructure-less

3、Hosts in wireless networks can work in two modes ( )
    A、online mode
    B、offline mode
    C、infrastructure mode
    D、ad hoc mode

4、APs transmit beacon frames. An AP’s beacon frames will be transmitted over one of the ( ) channels. The beacon frames permit nearby wireless stations to discover and identify the AP.
    A、9
    B、10
    C、11
    D、12

5、CDMA is a kind of ( ) protocol
    A、taking-turns protocol
    B、random access
    C、channel division
    D、none of the above