QN1. Computer networks means collection of
1. computers
2. networks
3. phones
4. tv’s
Answer
Answer: 1. computers
QN2. Computer networks can share
1. printers
2. books
3. cd
4. none
Answer
Answer: 1. printers
QN3. By using computer networks, cost can be
1. increased
2. reduced
3. neutralized
4. none
Answer
Answer: 2. reduced
QN4. By using computer networks, reliability can be
1. increased
2. reduced
3. neutralized
4. none
Answer
Answer: 2. reduced
QN5. Computer networks can act as a communication medium between
1. persons
2. databases
3. both
4. none
Answer
Answer: 3. both
QN6. By using computer networks, we can
1. shop online
2. pay bills online
3. surf
4. do all the above
Answer
Answer: 4. do all the above
QN7. E-mailing can be possible because of the availablity of
1. books
2. tv
3. computer networks
4. mp3 player
Answer
Answer: 3. computer networks
QN8. Based on transmission technology, computer networks can be classified into _____ types of networks
1. 1
2. 2
3. 3
4. 4
Answer
Answer: 2. 2
QN9. Broadcast networks have ________ communication channels.
1. 1
2. 2
3. 3
4. 4
Answer
Answer: 1. 1
QN10. Short messages are called
1. data
2. packets
3. information
4. fields
5. None of these
Answer
Answer: 5. None of these
QN11. In packets, ____ field contain information about to whom the packet is sent.
1. data
2. header
3. address
4. mode
Answer
Answer: 3. address
QN12. In broadcast networks, if two or more packets are sent at the same time, they
1. merge
2. divide
3. multiply
4. collide
Answer
Answer: 1. merge
QN13. Packet collision results in
1. data loss
2. data gain
3. nothing
4. none
Answer
Answer: 1. data loss
QN14. Sending packets to all the computers in a network is called
1. multicasting
2. broadcasting
3. telecasting
4. typecasting
Answer
Answer: 2. broadcasting
QN15. LAN means
1. large area network
2. local area network
3. local area number
4. none
Answer
Answer: 2. local area network
QN16. MAN means
1. metropolitan area network
2. mapping area network
3. metropolitan access network
4. none
Answer
Answer: 1. metropolitan area network
QN17. An LAN, transmission time is
1. not known
2. unbounded
3. bounded
4. none
Answer
Answer: 3. bounded
QN18. In LAN, data transfer rate lies between
1. 0-5Mbps
2. 5-10Mbps
3. 10-100Mbps
4. 100-1Mbps
Answer
Answer: 4. 100-1Mbps
QN19. The LAN standard is known as
1. methylnet
2. ethylnet
3. none
4. Ethernet
Answer
Answer: 4. Ethernet
QN20. The LAN standard is also known as
1. IEEE 802.3
2. IEEE 802.5
3. IEEE 802.6
4. 802.11
Answer
Answer: 1. IEEE 802.3
QN21. The ________ layer is the layer closest to the transmission medium
1. physical
2. data link
3. network
4. transport
Answer
Answer: 1. physical
QN22. A request message always contains
1. a header
2. a status line
3. a status line and a header
4. a request line
Answer
Answer: 3. a status line and a header
QN23. The header supplies information about the body of a document
1. general
2. request
3. response
4. entity
Answer
Answer: 4. entity
QN24. _____ encoding has a transmission at the beginning of each 0 bit.
1. RZ
2. Manchester
3. differential
4. all the above
Answer
Answer: 3. differential
QN25. PCM is an example of _____ conversion.
1. Digital to digital
2. digital to analog
3. analog to analog
4. analog to digital
Answer
Answer: 4. analog to digital
QN26. If the bits rate for an ASK signal is 1200 bps, the baund rate is
1. 300
2. 4000
3. 600
4. 1200
Answer
Answer: 4. 1200
QN27. If FCC regulation are followed,____potential FM stations are theoretically possible in a given area
1. 50
2. 100
3. 150
4. 133
Answer
Answer: 1. 50
QN28. Gaurd bands increase the bandwidth for
1. FDM
2. TDM
3. Both
4. none
Answer
Answer: 1. FDM
QN29. Which of the following is a time division switch?
1. TSI
2. TDM bus
3. crosspoint
4. none
5. Both (1) and (2)
Answer
Answer: 5. Both (1) and (2)
QN30. Data from a computer are_____; the local loop handles___ signals
1. digital; analog
2. digital; analog
3. analog; digital
4. none
Answer
Answer: 5. Both (1) and (2)
QN31. A traditional telephone line has a bandwidth of___
1. 2000Hz
2. 2000MHz
3. 4000Hz
4. 4000MHz
Answer
Answer: 3. 4000Hz
QN32. ARQ stands for
1. automatic repeat quantization
2. automatic repeat request
3. acknowledge repeat request
4. automatic retransmission request
Answer
Answer: 2. automatic repeat request
QN33. The HDLC ___ field defines the beginning and end of a frame
1. flag
2. address
3. control
4. FCS
Answer
Answer: 1. flag
QN34. When data and acknowledgement are sent on the same frame, this is called?
1. piggybacking
2. backpacking
3. piggypacking
4. none
Answer
Answer: 1. piggybacking
QN35. In the ________ random access method there is no collision.
1. ALOHA
2. CSMA/CD
3. CSMA/CA
4. all the above
Answer
Answer: 3. CSMA/CA
QN36. ___ is (are) a canalization protocol
1. FDMA
2. TDMA
3. CDMA
4. All the above
Answer
Answer: 4. All the above
QN37. When a primary device asks a secondary device if it has data?
1. polling
2. selecting
3. reserving
4. backing off
Answer
Answer: 1. polling
QN38. ________ is a dynamic mapping protocol in which a physical address is found for a given IP address
1. ARP
2. RARP
3. ICMP
4. none
Answer
Answer: 1. ARP
QN39. An ARP reply is ___ to______
1. broadcast; all hosts
2. multicast; one host
3. unicast; all host
4. unicast; one host
Answer
Answer: 4. unicast; one host
QN40. An ARP request is ___ to______
1. broadcast; all hosts
2. multicast; one host
3. unicast; all host
4. unicast; one host
Answer
Answer: 1. broadcast; all hosts
