Answers to written test and interview questions of network management system maintenance engineer

Network management system maintenance engineers can enjoy the test questions, welcome everyone's attention!

I. Fill in the blanks (2 points for each question, 30 points for * * *)

1, data communication can have simplex, duplex and () three communication modes.

2. Packet switching can be divided into variable packet switching and fixed packet switching, and CMNET adopts () switching.

3.WAP uses () channel mode to establish communication between nodes and WAP gateway.

4. The network service quality requirements of 4.CMNet are: the packet loss rate at any two points in the network? Less than or equal to ()

5. The protocol between 5.SGSN and GGSN is ().

6. In the GPRS network, the mobile phone obtains the IP address from ().

7. A80 10 accesses the server, and each RPU board can have () modem users.

8. Ethernet is connected by twisted pair, and the longest distance shall not exceed () meters.

9. When configuring the router, if you use the console port to connect, the connection rate is usually set to () bps.

10, the gateway code of SMS gateway must be a () digit string.

1 1. In a relational database, the column of a two-dimensional table is called (), and the row of a two-dimensional table is called ().

12, () is the standard language of relational database.

13, ORACLE database has two backup methods, the first is physical backup, and the second is logical backup, in which logical backup is divided into three modes: (), () and ().

14. It is known that a transmission channel transmits binary symbols, and the symbol rate is 2M baud, so the information rate of the transmission system is ().

The seven-layer reference models of 15 and OSI are (), (), (), (), (), (), (), ().

Second, multiple-choice questions (2 points for each question, ***30 points)

1, the purpose of using the TRACE command is ().

A, available and very successful test means B, very basic test means C, adding IP address and DNS D to the routing table, and finding the fault point in the transmission process from the source to the target.

2. For the router, the following () function is unique.

A. the router binds MAC address and IP address; B, the router receives the broadcast message and provides the requested information; C, the router establishes an ARP table to describe all the networks connected with it; D. the router responds to the ARP request.

3. The network interface card is located in the () layer of the OSI model.

A, data link layer b, physical layer c, transport layer d and presentation layer

4. 1000BASE-T standard stipulates that the maximum length of unshielded twisted pair between network card and hub is ().

A, 50m b,100m c, 200m d, 500m

5. About what? Deadlock , the following statement is correct ().

A. Deadlock is a problem in operating system. There is no such thing as B. Deadlocks only occur when concurrent operations occur. C. The method to prevent database operation deadlock is to prohibit two users from operating the database at the same time. When two users compete for the same resources, there will be no deadlock.

6. In the ISO/OSI reference model, the main function of the network layer is ().

First, provide a reliable end? End service, transparent transmission of messages, b, routing, congestion control and network interconnection, c, data transmission between communication entities in units of frames, data format conversion, data encryption and decryption, data compression and recovery.

7. In the following concepts, () is not a data control function that a database management system must provide.

A, security b, integrity c, portability d, consistency

8, wireless mobile communication, suitable for small-scale low-power home network is () technology.

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