【University Computer Technology】Chapter 7 Test 3

multiple choice

1. In the local area network, each computer must be set with an IP address in order to transmit information frames.
   A. Correct
   B. Incorrect
   Correct answer: B

2. Each network card has a globally unique address called a MAC address, so the network card is more complicated, and it is generally made in the form of an independent card.
   A. Correct
   B. Incorrect
   Correct answer: B

3. Sun Microsystems computer company once put forward a slogan: "The network is a computer". Its real connotation is that computer network users can share all software, hardware and data resources in the entire network, just like using their own computers.
   A. Correct
   B. Incorrect
   Correct answer: A

4. Different types of LANs may use different network cards, MAC addresses, and data frame formats.
   A. Correct
   B. Incorrect
   Correct answer: A

5. In order for two computers to exchange information, they must be connected to each other using wires.
   A. Correct
   B. Incorrect
   Correct answer: B

6. From the perspective of the services provided by the network alone, there is no essential difference between a wide area network and a local area network.
   A. Correct
   B. Incorrect
   Correct answer: A

7. A WAN covers a wider area than a LAN, but the technologies they use are exactly the same.
   A. Correct
   B. Incorrect
   Correct answer: B

8. A router can connect to a heterogeneous network, but not to a homogeneous network. A gateway is required to connect to a homogeneous network.
   A. Correct
   B. Incorrect
   Correct answer: B

9. Most commercial routers provide the filtering function to filter specific IP datagrams, which plays an important role in ensuring network security.
   A. Correct
   B. Incorrect
   Correct answer: A

10. Shared Ethernet (Ethernet) is a local area network using a bus structure. In the shared Ethernet, all computers are connected to a bus through Ethernet cards, and communicate with each other by broadcasting.
    A. Correct
    B. Incorrect
    Correct answer: A

11. Switched Ethernet adopts a star structure connection, and all computers in the network are connected to a central switch, and can communicate with each other.
    A. Correct
    B. Incorrect
    Correct answer: A

12. Every computer on the Internet has an IP address, and routers may not.
    A. Correct
    B. Incorrect
    Correct answer: B

13. A packet switch is a dedicated communication device with multiple ports, and each port has a buffer to store packets waiting to be sent.
    A. Correct
    B. Incorrect
    Correct answer: A

14. The functions of the router are generally realized by the hardware network card.
    A. Correct
    B. Incorrect
    Correct answer: B

15. A switched Ethernet can be constructed with a switched hub, and its performance is better than that of a bus Ethernet.
    A. Correct
    B. Incorrect
    Correct answer: A

16. Network software is an indispensable software to realize network functions.
    A. Correct
    B. Incorrect
    Correct answer: A

17. Some models of printers have their own network card, which can be directly connected to the network.
    A. Correct
    B. Incorrect
    Correct answer: A

18. Each Ethernet card has a globally unique MAC address, which consists of 6 bytes (48 binary bits).
    A. Correct
    B. Incorrect
    Correct answer: A

19. In the data communication system, in order to realize mutual communication between many data terminal equipments, must adopt some kind of exchange technology. The switching technology commonly used in the wide area computer network is circuit switching at present.
    A. Correct
    B. Incorrect
    Correct answer: B

20. A computer on a network that runs mail server software is called a mail server.
    A. Correct
    B. Incorrect
    Correct answer: A