UGC NET previous question paper

June 2010

27. What does the URL need to access documents?

I. Path name II. Host name

III. DNS  IV. Retrieval method

V. Server port number

(A) I, II, III (B) I, III, V

(C) I, II, IV (D) III, IV, V

28. End-to-End connectivity is provided from Last-to-Last in

(A) Network layer (B) Session layer

(C) Transport layer (D) Data link layer

29. What services does the internet layer provide ?

1. Quality of service 2. Routing

3. Addressing  4. Connection oriented delivery

5. Framing bits

(A) 1, 2, 3 (B) 2, 3, 4

(C) 1, 3, 4, 5 (D) 2, 3, 4, 5

30. What is the maximum operating rate of a wireless LAN using infrared communication?

(A) 1 mbps (B) 2 mbps

(C) 5 mbps (D) 11mbps

December 2010

26. Frequency shift keying is used mostly in

(A) Radio transmission (B) Telegraphy

(C) Telephone (D) None of the above

27. The baud rate is (A) always equal to the bit transfer rate

(B) Equal to twice the bandwidth of an ideal channel

(C) Not equal to the signaling rate

(D) Equal to half of the bandwidth of an ideal channel

28. How much bandwidth is there in 1 micron of spectrum at a wavelength of 1 micron?

(A) 300 MHz

(B) 3 GHz

(C) 300 THz

(D) 30 KHz

29. Which of the following file transfer protocols use TCP and establishes two virtual circuits between the local and remote server?

(A) FTP   (B) TFTP

(C) TELNET (D) NFS

30. The threshold effect in demodulator is

(A) Exhibited by all demodulator, when the input signal to noise ratio is low.

(B) The rapid fall on output signal to noise ratio when the input signal to noise ratio fall below a particular value.

(C) The property exhibited by all A.M. suppressed carrier coherent demodulator. 

(D) The property exhibited by correlation receiver.

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