MCQ QUESTION OF DATA COMMUNICATION & NETWORKING

Q 1.   Binary equivalent of polynomial x7+x5+x+1

Select Your Answer

1: 10100011  2: 01011100  3: 1111  4: 1010001

Q 2.   Which of the following is not an advantage of a layered model?

Select Your Answer

1: Allows multiple-vendor development through standardization of network components  2: Allows various types of network hardware and software to communicate  3: Prevents changes in one layer from affecting other layers, so it does not hamper Development  4: Allows changes to occur in all layers without having to change just one layer

Q 3.   NIC (Network Interface Card) is ……….. layer device

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1: Application  2: Network  3: Data Link  4: Physical

Q 4.   Which encoding technique attempts to solve the loss of synchronization due to long strings of 1s?

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1: Unipolar  2: NRZ-L  3: NRZ-I  4: Both NRZ-L and NRZ-I

Q 5.   The information to be communicated in a data communications system is the _______.

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1: Medium  2: Message  3: Protocol  4: Transmission

Q 6.   IP address is ……… bit long.

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1: 8  2: 16  3: 32  4: 48

Q 7.   Identify class of IP address 191.1.1.3

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1: Class A  2: Class B  3: Class C  4: Class D

Q 8.   Unit to measure amplitude of electric signal is ……..

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1: meter  2: second  3: Hertz  4: volts

Q 9.   PAM (Pulse Amplitude Modulation) is an example of …………… conversion.

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1: Digital-to-digital  2: digital-to-analog  3: analog-to-digital  4: analog-to-analog

Q 10.   Range of Well-known port numbers is ………………………….

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1: 0-123  2: 0-65,535  3: 0-1024  4: 0-1023

Q 11.   ………………………… transmission refers to one direction data transfers but one at a time

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1: Simplex  2: Half-Duplex  3: Full-Duplex  4: None of the above

Q 12.   Which encoding uses alternating positive and negative values for 1s?

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1: NRZ-L  2: Manchester  3: NRZ-I  4: RZ

Q 13.   TCP protocol number is ….

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1: 6  2: 8  3: 16  4: 32

Q 14.   Which OSI layer defines the standards for data formats and encryption?

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1: Layer7  2: Layer6  3: Layer5  4: Layer4

Q 15.   ______ cables are composed of a glass or plastic inner core surrounded by cladding, all encased in an outside jacket

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1: Coaxial  2: Fiber  3: Twisted-Pair  4: All the above

Q 16.   CHAP stands for……………….

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1: Challenge Handshake Access Protocol  2: Challenge Heavy Authentication Protocol  3: Challenge Handshake Authentication Protocol  4: None of the above

Q 17.   Out of the following, which is not a public address?

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1: 11.1.1.1  2: 130.1.1.1  3: 158.1.1.1  4: 10.1.1.1

Q 18.   If the ASCII character A is sent and at receiver end ASCII character B is received. What type of error it is?

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1: Single-bit  2: Burst Error  3: Can't Say  4: None of the above

Q 19.   During CRC generation at sender site, ……….. are added to the data unit before the division process.

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1: 0s  2: 1s  3: combination of 0s and 1s  4: CRC remainder

Q 20.   Out of the following, which is the UDP protocol?

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1: FTP  2: TFTP  3: HTTP  4: All of the above

Q 21.   ………………………… transmission refers to both direction data transfers all the time.

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1: Simplex  2: Half-Duplex  3: Full-Duplex  4: All the above

Q 22.   ……………… is also called as protocol converter.

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1: Bridge  2: Switch  3: Gateway  4: Router

Q 23.   If the frequency spectrum of a signal has a bandwidth of 100 Hz with the highest frequency at 200 Hz, what should be the sampling rate, according to the Nyquist theorem?

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1: 100 samples/sec  2: 200 samples/sec  3: 400 samples/sec  4: None of the above

Q 24.   With regards to bridges and switches, which of the following statements is False?

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1: Switches are primarily software based while bridges are hardware based  2: Both bridges and switches forward Layer 2 broadcasts  3: Switches typically have a higher number of ports than bridges  4: Both bridges and switches make forwarding decisions based on Layer 2 addresses

Q 25.   What is the maximum effect of the noise of 1/100 sec; if data rate is 1Kbps?

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1: 1 bit  2: 10 bits  3: 100 bits  4: None of the above

Q 26.   If the bit rate for an FSK signal is 1000 bps, the baud rate is ----------- bauds

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1: 500  2: 1000  3: 1500  4: 2000

Q 27.   If sampling rate is 8,000 sample/sec. What is the bit rate, assuming 8 bits per sample?

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1: 8,000 bps  2: 16,000 bps  3: 32,000 bps  4: 64,000 bps

Q 28.   If a baud rate is 800 for a 4-PSK signal, the bit rate is …………bps

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1: 200  2: 800  3: 1600  4: 3200

Q 29.   The code 1101011100 was received. Using Hamming encoding method 2, what is the original code sent?

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1: 1101010100  2: 1101011100  3: 1101111100  4: None of the above

Q 30.   Your ISP has assigned you the following IP address and subnet mask. IP address: 199.141.27.0 And Subnet mask: 255.255.255.240. Which of the following address can be allocated to hosts on the resulting subnet?

Select Your Answer

1: 199.141.27.175  2: 199.141.27.112  3: 199.141.27.13  4: None of the above