..........

1. Which of the following is not an advantage of a star network?

• A. Hubs, repeaters, etc. are made with more advanced technology, and new generations of products are regularly released.

  
  

• B. Installation, maintenance, and expansion are very easy, the network is not interrupted

  
  

• C. If the problem occurs on any machine's cable segment, only that machine will be isolated from the network, the network will still operate normally.

  
  

• D. The cost is lower than other types because the cost of equipment is decreasing

  
  

2. Which LAN technology uses the CSMA/CD method?

• A.FDDI

• B.Ethernet

• C.Token Ring

• D.ArcNet

3. What is not the function of the receiving side in the datalink layer

• A.Error control

• B.Encapsulation

• C.Flow control

• D.Reliability control

4. Choose the incorrect statement about local area networks

• A.Completely centralized and unified network exploitation management

• B.Currently, local networks only use star configuration

• C. Local area network has high speed and few errors

• D. No need to use navigation devices with complicated relationships

5. How to do error correction in the datalink layer?

• A. Single-bit parity check

• B. Multiple dimensional bit parity check

• C.CRC

• D.Resend packet

6. Choose the incorrect statement about the Ring network

• A. Consists of a circle without a beginning or end point

• B. Information on the network operates in a certain direction

• C. When passing through nodes, information is amplified so the distance between two nodes may be far apart

• D.Cards move sequentially on the physical ring

7. What is the primary function of the Data Link Layer?

• A.Routing

• B.Error detection and correction

• C.End-to-end communication

• D.Flow control

8. Token is a special unit of data, whose content includes information

• A.About error control and data flow

• B.User data

• C.Controls are specified separately for each method

• D.Route selection table

9. Why does collision occur in the channel?

• A.node receives two or more signals at the same time

• B.two or more transmissions by nodes

• C. communication in the shared channel

• D.no coordinator

10. Which protocol is commonly used for point-to-point communication in the Data Link Layer?

• A.ARP (Address Resolution Protocol)

• B.PPP (Point-to-Point Protocol)

• C.IP (Internet Protocol)

• D.ICMP (Internet Control Message Protocol)