PRACTICE PAPER NETWORKING PART-2

UGC NET JUNE 2013 SYLLABUS, MODEL PAPER/ PREVIOUS YEARS SOLVED QUESTION PAPERS. 

UGC NET (NATIONAL ELIGIBILITY TEST) : OLD SOLVED/PREVIOUS EXAM QUESTION PAPERS WITH SOLUTIONS AND EXPLANATIONS AND FREE STUDY MATERIALS.

COMPUTER MEMORY BASED PREVIOUS YEARS SOLVED PAPERS I, II AND III TO PREPARE AND PASS THE UGC NET/SLET ENTRANCE EXAMINATION WITH HIGH PERCENTAGE.

COMPUTER BASIC QUESTIONS FOR BANK EXAM, HTAT, CTAT, TAT, UGC-NET, INTERVIEW AND OTHER EXAM'S, WHERE BASIC QUESTION'S ARE REQUIRED.

1. The area of coverage of satellite radio beam is known as... ?

1. Footprint
2. Circular polarization
3. Beam width
4. Identity
5. None of Above

Answer = A
Explanation:No explanation for this question.

2. Coaxial cable has conductors with ?

1. Equal resistance
2. The same diameter
3. Both A and B
4. A common axis
5. None of these

Answer = D
Explanation: Coaxial cables has two type of conductors one is inner and other is outer that has common axis.

3. What protects the coaxial cable from noise ?

1. Inner conductor
2. Outer conductor
3. Diameter of cable
4. Insulating material

Answer = B
Explanation:The outer conductor is covered in protective plastic sheath. This shielding of coaxial cable give it a good combination of high bandwidth and excellent noise immunity.

4. Error detection at the data link level is achieved by ?

1. Bit stuffing
2. Hamming codes
3. Cyclic Redundancy codes
4. Equalization
5. None of above

Answer = A
Explanation:Bit stuffing also known as positive justification is the insertion of non-information bits into data.

5. MAN refers to ?

1. Mega Area Network
2. Metropolitan Area Network
3. Mini Area Network
4. Medium Area Network

Answer = B
Explanation: A metropolitan area network covers a city. The best example is the cable television network available in cities.

6. Which of the following layer is not in OSI model ?

1. physical layer
2. internet layer
3. network layer
4. transport layer

Answer =B
Explanation: The OSI model has total 7 layers out of which internet layer is not a part of OSI model.

7. Nyquist Theorem to calculate data rate is ?

1. 2H log2 V bits/sec
2. H log2 V bits/sec
3. Hlog2 (1+S/N)
4. 2H log2 (1+s/n)

Answer = A

8. Copper wire is an example of ?

1. Guided Transmission Media
2. Unguided Transmission Media
3. Group Media
4. None of these

Answer = A
Explanation:Copper wires comes under the Guided Media. Coaxial cables consist of the stiff copper wire as a core.
9. Iridium and Dysprosium projects, proposed by Motorola are related to ?

1. Geosynchronous satellite
2. Wavelength
3. Low orbit satellite
4. ISDN

Answer = C
Explanation:Moving down in altitude, we come to LEO satellites. Due to their rapid motion, large numbers of them are needed for a complete system.

10. Which of the following is a type of fragmentation ?

1. Transparent
2. Non transparent
3. Both A and B
4. None of these

Answer = C
Explanation:Fragmentation is used to break up the packets into fragments. It is of two types : Transparent and Non transparent

11. Collection of interconnected networks sometimes called ?

1. Internet
2. Wireless network
3. Mobile Network
4. None of these

Answer = A
Explanation: Internet is not a single network but network of networks.

12. Which of the following is wrong example of network layer ?

1. X.25 Level 2-ISO
2. Source Routing and Domain Naming Usenet
3. Internet Protocol(IP) - ARPANET
4. X-25 Packet Level Prrotocol (PLP) - ISO
5. None of these

Answer = A
Explanation: X.25 is an ITU - T standard that specifies an interface between a host system and a packet switching network.

13. Mobile computers and personal digital assistant (PDAs) are the examples of ?

1. Radio broadcasting
2. Wireless network
3. Geosynchronous
4. LAN

Answer = B
Explanation: Personal Digital Assistant also known as palmtop computers is a mobile device that functions as the personal information manager, mostly access internet through Wi - Fi or wireless wide area network

14. ATM (Asynchronous Transfer Mode) is fundamentally a....... technology?

1. Circuit switching
2. Packet switching
3. Narrow band
4. None of these

Answer = B
Explanation:ATM is a cell switching and multiplexing technology that combines the features of circuit switching with packet switching. Like X.25 and frame relay ATM defines the interaction between the user equipment and network.

15. Which of the following is a variation of Frequency Division Multiplexing (FDM) ?

1. Time Division Multiplexing(TDM)
2. Pulse Code Multiplexing(PCM)
3. Wavelength Division Multiplexing(WDM)
4. None of these

Answer = C
Explanation:The WDM is commonly applied on the optical carrier while FDM is applied on the radio carrier. Since wavelength and frequency are tied together through a simple directly inverse relationship, the two terms actually describe the same concept.

16. One security method is encryption. But encryption does nothing to keep digital pests and hackers out. To accomplish this goal, we need ?

1. Router
2. Bridges
3. Hubs
4. Firewalls

Answer = D
Explanation: Main objective of firewall is to control the incoming and outgoing network traffic by analyzing the data packets and determining whether it should be allowed through or not, based on a predetermined rule set.

17. HTTP refers to ?

1. Hyper Text Transfer Protocol
2. Hyper Text Transmission Protocol
3. Hyper Text Tie Protocol
4. None of these

Answer = A

18. Why was the OSI developed ?

1. Manufacturers disliked the TCP/IP protocol
2. The rate of data transfer was increasing exponentially
3. Standards were needed to allow any two systems to communicate
4. None of these

Answer = C
Explanation:OSI was an effort to standardize the networking that was started in 1977

19. Auto dialing allows ?

1. You to dial up phone numbers by typing them on the keyboard
2. A personal computer to answer incoming calls without human assistance
3. Both A and B
4. None of above

Answer = A
Explanation:Auto dialer is an electronic device or software that automatically dials the telephone numbers.

20. Sending a file from your personal computer's primary memory or disk to another computer is called ?

1. uploading
2. hang on
3. logging on
4. downloading
5. None of these

Answer = A
Explanation: Uploading refers to sending data from local system to remote system such as server or client.

21. A network that requires human intervention of route signals is called a ?

1. Bus network
2. Ring netwkork
3. Star network
4. T-switched network
5. None of above

Answer = D

22. Which layer functions as liaison between user support layers and network support layers ?

1. network layer
2. physical layer
3. transport layer
4. session layer

Answer = C
Explanation: Transport Layer functions as liaison between user support layers (Application, Presentation and Session) and network support layers (Network, Data Link and Physical)

23 If digital data rate of 9600 bps is encoded using 8-level phase shift keying method, the modulation rate is?

1. 1200 bands
2. 3200 bands
3. 4800 bands
4. 9600 bands
5. None of above

Answer = C

24. Maximum data rate of a channel for a noiseless 3-KHz binary channel is?

1. 3000 bps
2.  6000 bps
3. 1500 bps
4. None of above

Answer = B

25. If the bit string 0111101111101111110 is subjected to bit stuffing for the flag string 01111110, the output string is ?

1. 011110111110011111010
2. 01111011111011111100
3. 01111011111011111010
4. 0111101111101111110

Answer = A

26. Which of the following is not a standard RS-232C signal ?

1. RTS
2. CTS
3. DSR
4. VDR

27. In Ethernet CSMS/CD the special bit sequence transmitted by the media access management for collision handling is called as ?

1. preamble
2. postamble
3. jam
4. None of above

Answer = C

28. HDLC is ?

1. bit oriented
2. Code transparent
3. Code dependent
4. None of above
5. A and B

Answer = D

29. Which of the following are non-polling system ?

1. TDMA
2. stop & wait
3. Xon/Xoff
4. Continuous ARQ
5. A and C

Answer = E

30 Adaptive or dynamic directory used in packet routing changes ?

1. within each user session
2. with each user session
3. at system generation times only
4. Both A and B

Answer = A 

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