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This article will explain 10 daily exercises about computer network in detail for you. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

1. HTTP is a ().

Correct answer: C

A high-level programming language

B domain name

C Hypertext transfer Protocol

D web address

Answer to the question:

1. HTTP is a hypertext transfer protocol

2 、 HyperText Transfer Protoco

2. A hub is a device that works in ().

Correct answer: a

A physical layer

B link layer

C network layer

D transport layer

Answer to the question:

1. Hub: physical layer switch / bridge: data link layer

2. Physical layer: hub, repeater link layer: bridge, switch network layer: router transport layer: gateway

3. Physical layer: hub, repeater data link layer: bridge, switch network layer: router transport layer and above layer: gateway

3. In the OSI seven-layer model, the main functions of the network layer are

Correct answer: C

A transmits the original bit stream on the channel

B make sure that the information arriving at the other party is correct

C determines how packets are routed from source to destination

D strengthen the function of physical layer data transmission of raw bit stream and carry out flow control

Answer to the question:

1. Transmit the original bit stream (physical layer) on the channel to ensure that each piece of information arriving at the other party is correct (transport layer). Determine how packets are routed from source to destination (network layer) strengthen the physical layer data transmission function of the original bit stream and perform flow control (data link layer)

2. The function of the network layer is the function of the network layer device router.

3. It is mainly routing and packet forwarding. For D, the network layer is not directly related to the physical layer, and there is a data link layer in the middle, which should strengthen the function of the link layer.

4. 192.168.1.0 Universe 24 is subnetted with a mask of 255.255.255.240. The number of available subnets is (), and the number of available host addresses in each subnet is ().

Correct answer: B

A 14,14

B 16,14

C 254,6

D 14,62

Answer to the question:

1. The subnet mask is 255.255.255.240, which means that 4 bits have been borrowed from the host bit, so the number of subnets is 2 ^ 4 = 16. If 4 bits are borrowed, the host bit is 2 ^ 4 = 16.

2. Since the host bit all 0 represents the network number and all 1 represents the broadcast number, the host IP can be 16-2 = 14. Therefore: choose B

5. DDN and ISDN both belong to the data communication network, and their Chinese names are ().

Correct answer: a

A Digital data Network and Integrated Services Digital Network

B digital data network and frame relay network

C packet switching network and integrated services digital network

D frame Relay Network and packet switching Network

Answer to the question:

1. DDN is "Digital Data Network", a digital data network. ISDN is "Integrated Services Digital Network", Integrated Services Digital Network.

2. If you read English, you can guess almost. Frame Relay FR

6. On a CSMA/CD LAN (not 802.3), the maximum length of a data frame is 1518 bytes, and the header, checksum and other additional lengths are 18 bytes. What is the ratio of the three time it takes us to transmit 100bytes, 1000 bytes and 2000 bytes on this network when there is no conflict?

Correct answer: B

A 1:10:20

B 1:1:2

C 1:2:2

D 1:10:10

Answer to the question:

1. The data length is the data length to be transmitted plus the additional length.

The first one requires 100x18 to receive the request and continue to process 2 × × ("happy") = > means that the action is successfully received, understood and accepted 3 × × ("another trip") = > in order to complete the specified action, you must accept further processing of 4 × × ("solve your own problems") = > an error occurred in the client, and the request contains error syntax. The request cannot be executed correctly 5 × × ("service is not in place") = > there is an error on the server side, and the server cannot execute the request correctly. The common status code: 200 = > indicates that the request has been completed successfully, and the requested resource has been sent back to the client 301 = > permanent transfer 304 = > the server file has not been modified, and the client can use the local cache file to 403 = > prohibit access to 404 = > the requested resource does not exist (eg: typed the wrong URL, the resource has been deleted) 503 = > the server is temporarily unable to provide service.

8. Host An and host B have established TCP connections. It is known that B has received a message segment with the A terminal sequence number in the following range: 100-199, 200-299, 300-399, 500-599. When B receives a message segment of 600-699, B sends a confirmation field with a value of 700.

Correct answer: B

An is correct

B error

Answer to the question:

1. Please note that the message segment in the range of 40000499 has not been received, so the confirmation number should be 400.

2. 40000499 was not accepted, so the confirmation number should be 400.

9. The following items that do not belong to the WAN are ().

Correct answer: C

An ATM net

B frame relay network

C Ethernet

D. 25 packet switching network

Answer to the question:

1. The wide area network is the network with the largest coverage, which mainly includes public telephone switching network (PSTN), packet switching network (X.25), digital data network (DDN), frame relay (FR), switched multi-megabit data service (SMDS) and asynchronous transfer mode (ATM). Excluding Ethernet, Ethernet is the communication standard adopted by the local area network.

2. The wide area network, also known as the remote network, usually spans a large physical range, and even forms an international remote network. The coverage is wider than that of local area network (LAN) and metropolitan area network (MAN). Several commonly used wide area networks include: public telephone switched Network (PSTN), packet switched Network (X.25), Digital data Network (DDN), frame Relay (FR), switched Multi-megabit data Service (SMDS), Asynchronous transfer Mode (ATM). Wan can provide connection-oriented and connectionless service modes, and there are two networking modes corresponding to WAN: virtual circuit mode and Datagram mode.

3. Ethernet is the communication standard of LAN.

10. The following are network interconnected devices

Correct answer: ABDEF

A router

B repeater

C firewall

D network switch

E ordinary HUB

F gateway

Answer to the question:

1. Repeaters, hub, bridges, switches, routers and gateways all belong to network interconnection devices.

Summary of answers:

1. Correct answer: C

2. Correct answer: a

3. Correct answer: C

4. Correct answer: B

5. Correct answer: a

6. Correct answer: B

7. Correct answer: d

8. Correct answer: B

9. Correct answer: C

10. Correct answer: ABDEF

This is the end of the article on "10 daily exercises about computer network". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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