Network engineer test questions and answers in May of the first half of 2022

 

● The minimum unit of time for computer operation is (1)

(1) A. Instruction cycle

B. Clock cycle

C. Bus cycle

D.CPU cycle

Refer to the answer ：B

● The following is about Feng ● In the narration of Neumann computer , What's not right is (2)

(2)A. Program instructions and data are represented in binary

B. Program instructions are always stored in main memory , The data is stored in the cache

C. The functions of the program are controlled by the central processing unit ,(CPU) Execute instructions to realize

D. The execution process of the program is automatically controlled by instructions

Refer to the answer ：B

● In risk management , Strategies to reduce risks and hazards do not include (3)

(3) A. Risk aversion

B. Transfer risk

C. Eliminate risk

D. Accept risks and control losses

Refer to the answer ：C

● In order to reduce the online viewing of online video jam , Often use streaming media technology . The following statement about streaming media is incorrect (4).

(4) A. Streaming media needs caching

B. Streaming video resources cannot be downloaded locally

C. Streaming media technology can be used to watch videos 、 Live online

D. The format of streaming media resource file can be asf、rm etc.

Refer to the answer ：B

● Of the following options , What does not belong to the main function of the computer operating system is (5).

(5)A. Manage the software and hardware resources of the computer system

B. Give full play to the efficiency of computer resources

C. Provide a good running environment for other software

D. Store the data

Refer to the answer ：D

● Smart phones contain running memory and body memory , In the following statement about running memory , What's not right is (6).

(6) A. Also known as mobile phone RAM

B. It is used to temporarily store the operation data required by the processor

C. Ability to store data permanently

D. The larger the memory of the mobile phone , The better the performance

Refer to the answer ：C

● An e-commerce platform analyzes user consumption preferences according to user consumption records , Predict future consumption trends , This is a (7) Typical applications of Technology .

(7) A. The Internet of things

B. Blockchain

C. Cloud computing

D. big data

Refer to the answer ：D

● In the following description of Cloud Computing , What's not right is (8).

(8) A. Cloud computing centralizes the computing of all customers in one - On a large computer

B. Cloud computing is an increase in Internet-based services 、 Usage and delivery patterns

C. Cloud Computing supports users to use various terminals to obtain corresponding services at any location

D. Cloud computing is based on service-oriented architecture and virtualized system deployment

Refer to the answer ：A

●SOA ( Service Oriented Architecture ) It's a kind of (9) Service Architecture .

(9) A. fine-grained 、 Tightly coupled

B. coarse-grained 、 loose coupling

C. coarse-grained 、 Tightly coupled

D. fine-grained 、 loose coupling

Refer to the answer ：B

● Among the information assets that need to be protected (10) Is the most important .

(10) A. Software

B. Hardware

C. data

D. Environmental Science

Refer to the answer ：C

● In the following frequencies , What belongs to the microwave band is (11)

(11) A.30Hz

B.30KHz

C.30MHz

D.30GHz

Refer to the answer ：D

● In the following statement about Ethernet switches , The wrong is (12).

(12) A. Ethernet switches work at the data link layer

B. Ethernet switches can isolate conflict domains

C. Compared with the direct switching mode, the store and forward switching mode in Ethernet switches has the shortest delay

D. Ethernet switch through MAC Address table forwarding data

Refer to the answer ：C

● a 16 Port full duplex Gigabit switch , Need at least (13) The line speed forwarding can only be realized with the backplane bandwidth of .

( 13) A.1.488Gbps

B.3.2Gbps

C.32Gbps

D.320Gbps

Refer to the answer ：C

●5G Quadrature amplitude modulation ( Quadrature Amplitude Modulation, QAM) In technology ,2560QAM One carrier of can be modulated (15). Bit information .

(15) A.2

B.4

C.6

D.8

Refer to the answer ：D

● The following about Kerberos In the description of the authentication protocol , The right is (16) .

(16) A. The key distribution center includes an authentication server 、 Ticket authorization server and client

B. The interaction of the protocol uses public key encryption algorithm to encrypt messages

C. There is no need to share long-term keys between users and servers

D. The purpose of the agreement is to allow users to obtain service license tickets for accessing the application server

Refer to the answer ：C

● As shown in the figure below , If PC adopt tracert Command get router R3 Of IP Address ,PC Send package ICMP News IP The characteristics that the message should meet are (17) .

(17) A. ICMP News Type=11, Code=0; IP The message TTL Field is 3

B. ICMP News Type=8,Code=0; IP The message TTL Field is 3

C. ICMP News Type=11, Code=0; IP The message TTL Field is 128

D. ICMP News Type=8, Code=0; IP The message TTL Field is 128

Refer to the answer ：B

● In optical fiber access technology ,EPON In the system ONU towards OLT Send data using (18) technology .

( 18) A. TDM

B. FDM

C. TDMA

D. radio broadcast

Refer to the answer ：C

● In the dual link hot backup wireless access network shown in the figure below ,STA adopt Pontal Certification Online ,AP The currently connected master AC by AC1, STA adopt AP stay AC1. go online , Here's about AC2 Description of , The right is (19).

 

(19) A.AC2 There are AP Information about , And AP stay AC2 The status of is standby

B.AC2 There are AP Information about , And AP stay AC2 The status of is normal

C. AC2 There are STA Information about , And STA The status of is not certified

D.AC2. There are STA Information about , And STA The status of is certified

Refer to the answer ：D

 

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