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20 Spring term "computer network" online job usually 1
Paper Total: 100 Score: 100
a, multiple choice (a total of 15 questions, a total of 75 points)
1 to complete the transfer of data between the device is a VLAN ().
A. hub
B. switch
C. router
D. gateway
2. The level interconnection means interconnected between the different protocol layers and above the transport layer network. To achieve high-level interconnection equipment is ().
A. repeater
B. bridges
C. router
D. gateway
3. In calculating the CRC code may be a binary bit string containing only one or a monohydric 0 1 two polynomial coefficients correspondence relationship. For example, the bit string corresponding to the polynomial 101101 ().
+ X3 + X4 + A.x6. 1
B.x5 + X3 + X2 +. 1
C.x5 + X3 + X2 + X
D.x6 + X5 + X4 +. 1
4. Fast Ethernet port rate switch is a 100Mbit / s, if the port can support full-duplex transmission of data, then the actual transmission bandwidth port ().
A.100Mbit / S
B.150Mbit / S
C.200Mbit / S
D.1000Mbit / S
5.IP address 202.116.39.113 represented by () method.
A. decimal
B. Binary
C. decimal point
D. dotted binary
6. The bidirectional channel has, at the same time but only one-way communication system is a data transfer ().
A. simplex
B. half duplex
C. Full Duplex
D. not all of the three
7. laying a small LAN within an office, a total of four single PC need to be connected through a hub. Cable Type Category 5 twisted pair is used. In theory, any two PC's maximum distance is ().
A.400m
B.100m
C.200m
D.500m
8 can be provided to transfer files between any two computers is the Internet protocol ().
A.FTP
B.WWW
C.Telnet
D.SMTP
9. The token ring topology is ().
Ring A.
B. Star
C. bus
D. tree
10.Ping instruction is implemented () protocol.
A.ARP
B.IGMP
C.ICMP
D.IP
11. The following () is the broadcast address.
A.1.1.1.1
B.255.255.255.255
C.1.0.1.0
D.127.0.0.1
12. Which of the following domain name () one to one?
A. Physical Address
B.IP address
C. Network
D. None of the above
13.CSMA / CD protocol is defined by the IEEE802.3 standard, which applies to (),.
A. Token Ring
B. token bus network
C. Network interconnection
D. Ethernet
14. The following addresses, the subnet mask is not ().
A.255.255.0.0
B.255.255.255.0
C.255.241.0.0
D.255.254.0.0
15. The WAN may encompass a range ().
A.2Km within
B.2 ~ 5Km
C.5 ~ 10Km
or more D.10Km
Second, determine the questions (5 questions total of 25 points)
16. The switch device is a data link layer.
17. IEEE802.3 token describes how to send the data network is controlled in the network.
18. The packet switching will always cause some delay in the node store and forward.
19.FDDI good network performance under heavy load.
20.ARP agreement is not a security vulnerability.
