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20 Spring term "computer network" online job usually 3
Paper Total: 100 Score: 100
a, multiple choice (a total of 15 questions, a total of 75 points)
1. In one Ethernet, there are A, B, C, D four host, if data A is transmitted to B, then ().
A. Only B can receive the data
B. Data B instantly reach
C. data transfer there is a delay
D. Other host can also transmit data simultaneously
2. The following does not belong to interact with the memory card is ().
AI / O programming mode
B. broadcasting
C.DMA way
D. memory sharing
The maximum allowable number of hops 3.RIP agreement is ().
A.16
B.15
C.30
D.25
4.MAC by the address () hexadecimal group consisting dotted.
A.4
B.6
C.8
D.10
The token ring network, the following statement is correct ().
A. Light that no conflict arises when the carrier, when overloaded conflict
B. conflict when a light load, heavy load no conflict
C. When light load performance, the performance difference is overloaded
D. performance difference when light load, heavy upload good performance
6.IP host number part of the address is 189.134.210.67/255.255.0.0 ().
A.189
B.189.134
c.67
D.210.67
7. If the frame number occupies 4 bits of the data link, the transmission side should be the maximum window ().
A.13
B.14
C.15
D.16
8. Which of the following is not a peer characteristics ().
A. erection easily
B. cost
C. network for small
centralized resource management D.
9. IP address of a host of 10.11.251.55, subnet mask 255.255.0.0. Broadcast address of the network where the host is ().
A.10.11.251.55
B.10.11.255.255
C.10.255.255.255
D.10.11.251.255
10.IP agreement, if the value does not contain header options field, the first minister of the field should be ().
A.0
B.5
C.10
D.20
11. A collision domain is always () broadcast domain.
Equal to A.
B. than or equal to
C. less
D. not equal
12. From the structure of the Internet see, belonging to the bridge connecting end DCE stage, from a protocol perspective, it works in the bridge ().
A. The physical layer category
B. Category link layer
C. Network layer visible
D. transporting layer visible
13.IP address 202.116.39.113 represented by () method.
A. decimal
B. Binary
C. decimal point
D. dotted binary
14. The following description of the network architecture, the error is ().
A. network architecture is abstract, while the implementation is specific
between layers of hierarchy B. independent
C. Network architecture to achieve the specified function of the hardware and software have a clear definition of
D. occurs when any one when changes, as long as the interface remains the same, the other layers are unaffected
15.RIP (Routing Information Protocol) using () as the routing protocol.
Distance vector A.
B. link state
C. traffic dispersion
D. fixed look-up table
Second, determine the questions (5 questions total of 25 points)
16. When the timer function is stopped and other protocols Super avoid deadlock.
17. In the three operating modes of the card, DMA mode optimal performance.
18. The token bus for industrial control network.
19. When the baud rate is 9600, not 56K modem connection.
20. In IEEE802.3 local area network, must provide the minimum frame length.
