Q. If carrier modulated by a digital bit stream, has one one of the possible phase of 0, 90, 180 and 270 degrees, then modulation called

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Q. Consider the following statement :

(i) The bandwidth of the A.M., wave depends on the band width of the modulating signal.
(ii) The bandwidth of the A.M., wave depends on the modulation index.
(iii) The bandwidth of the F.M, wave for all practical purpose depends on the amplitude of the carrier.

Of these statements the correct statements are

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Q. A smart modem can dial, hangup and answer incoming calls automatically. Can you tell who provides the appropriate instructions to the modem for this purpose ?

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Q. Which of the following switching techniques is most suitable for interactive traffic ?

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Q. Frequency shift keying is used mostly in

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Q. The baud rate is

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

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

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Q. The threshold effect in demodulator is

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Q. The …………… field is the SNMP PDV reports an error in a response message.

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

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Q. What services does the internet layer provide?

1. Quality of service
2. Routing
3. Addressing
4. Connection oriented delivery
5. Framing bits

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

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Q. The cost of the network is usually determined by

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Q. A leased special high-speed connection from the local telephone carrier for business users that transmits at 1.544 mbps is known as ……………. carrier.

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Q. CDMA Cell uses …………… carriers of 1.25 MHz.

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Q. If in an error detection and correction code a message M : “You are good students” is stored as M' :

Youare areyou aregood goodare goodstudents studentsgood.

What is the space required to store M' in general? (assume that ‘n’ is the length of M)

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Q. Device on one network can communicate with devices on another network via a

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Q. What is the maximum window size in sliding window protocol used in a computer network?

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Q. Which of the following are Data Link Layer standard?

1. Ethernet
2. HSSI
3. Frame Relay
4. 10 – Base T
5. Token Ring

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