Computer Science - Networking MCQs Part 7

1. Most networks are connected to other local area or wide area networks. Select the best fit for answer:

A.
Internet works

B.
The Internet

C.
Internet revolution

D.
Internet technologies

 Answer Option A

2. You are working with a network that is 172.16.0.0 and would like to support 600 hosts per subnet. What subnet mask should you use?

A.
255.255.192.0

B.
255.255.224.0

C.
255.255.240.0

D.
255.255.248.0

E.
255.255.252.0

 Answer Option E

3. A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission rate?

A.
1.5 Mbaud/sec

B.
6 Mband/sec

C.
12 Mbaud/sec

D.
24 Mbaud/sec

E.
None of the above

 Answer Option C

4. Which of the following digits are known as the sub-address digits (for use by the user) of the Network User Address (NUA)?

A.
5-7

B.
1-4

C.
8-12

D.
13-14

E.
None of the above

 Answer Option D

5. Error detecting code is

A.
an error-detecting code based on a summation operation performed on the bits to be checked

B.
a check bit appended to an array of binary digits to make the sum of all the binary digits.

C.
a code in which each expression conforms to specify rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and thus the presence of the error is detected.

D.
the ratio of the data units in error to the total number of data units

E.
None of the above

 Answer Option C

6. A modulator converts a _____ signal to a(n) _____ signal.

A. FSK; PSK

B. PSK; FSK

C. analog; digital

D. digital; analog

E. None of the above

 Answer Option D

7. The birthplace of the World Wide Web is considered to be

A. the Department of Defense

B. CERN

C. ARPA

D. Netscape

E. None of the above

 Answer Option B

8. You have purchased a MAU (Multistation Access Unit) from your computer supplier and now must decide what type of network card you should install in the workstations. Which of the following would be the most appropriate?

A. Fast SCSI Wide

B. Token-Ring

C. ArcServe

D. Ethernet

E. None of the above

 Answer Option B

9. What is the loopback address?

A. 127.0.0.1

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.255.0

E. None of the above

 Answer Option A

10. An ROP would be attached to a

A. simplex channel

B. duplex channel

C. half duplex channel

D. full duplex channel

E. None of the above

 Answer Option A

11. Who originally designed TCP/IP?

A. The Department of Defense

B. Novell

C. IBM

D. Xerox

 Answer Option A

12. The systematic access of small computers in a distributed data processing system is referred to as:

A. dialed service

B. multiplexing

C. polling

D. conversational mode

E. None of the above

 Answer Option C

13. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:

A. modulation

B. demodulation

C. synchronizing

D. synchronizing

E. None of the above

 Answer Option B

14. An example of digital, rather than analog, communication is

A. DDD

B. DDS

C. WATS

D. DDT

E. None of the above

 Answer Option B

15. How many OSI layers are covered in the X.25 standard?

A. two

B. three

C. seven

D. six

E. None of the above

 Answer Option B

16. A band is always equivalent to

A. a byte

B. a bit

C. 100 bits

D. 16 bits

E. None of the above

 Answer Option E

17. What is the port number for HTTP?

A. 99

B. 86

C. 80

D. 23

 Answer Option C

18. The most flexibility in how devices are wired together is provided by

A. bus networks

B. ring networks

C. star networks

D. T-switched networks

E. None of the above

 Answer Option A

19. Which of the following statement is incorrect?

A. The transport layer provides for any format, translationer code conversion necessary to put the data into an intelligible format.

B. The presentation layer transforms information from machine format to the understandable format.

C. The data link layer handles the transfer of data between the ends of a physical link.

D. All of the above

E. None of the above

 Answer Option A

20. When you connect to an online information service, you are asked to provide some kind of identification such as your name, an account number and a password. What is the name given to this brief dialogue between you and the information system?

A. Security procedure

B. Safeguard procedure

C. Identification procedure

D. Log-on procedure

E. None of the above

 Answer Option D

21. Bus is

A. one or more conductors that some as a common connection for a related group of devices

B. a continuous frequency capable of being modulated or impressed with a second signal

C. the condition when two or more stations attempt to use the same channel at the same time

D. a collection of interconnected functional units that provides a data communications service among stations attached to the network

E. None of the above

 Answer Option A

22. Which of the following medium is used for broadband local networks?

A. Coaxial cable

B. optic fiber

C. CATV

D. UTP

E. None of the above

 Answer Option C

23. In cyclic redundancy checking what is the CRC?

A. the divisor

B. the quotient

C. the dividend

D. the remainder

 Answer Option D

24. What is the maximum number of entries in the HOSTS file?

A. 8

B. 255

C. 500

D. Unlimited

E. None of the above

 Answer Option D

25. The communication mode that supports data in both directions at the same time is

A. simplex

B. half-duplex

C. full-duplex

D. multiplex

E. None of the above

 Answer Option C

26. Which of the following program is used to copy files to or from another UNIX timesharing system over a single link?

A. VMTP

B. TFTP

C. UUCP

D. UART

E. None of the above

 Answer Option C

27. One important characteristic of the hub architecture of ARC-net is

A. directionalized transmission

B. access control and addressing

C. multiple virtual networks

D. alternative routing

E. None of the above

 Answer Option A

28. The basic Ethernet design does not provide

A. access control

B. addressing

C. automatic retransmission of a message

D. multiple virtual networks

E. None of the above

 Answer Option C

29. Phase shift keying (psk) method is used to modulate digital signals at 9600 bps using 16 levels. Find the line signaling speed (i.e., modulation rate)

A. 2400 bands

B. 1200 bands

C. 4800 bands

D. 9600 bands.

 Answer Option A

30. You are in the process of analyzing a problem that requires you to collect and store TCP/IP Packets. Which of the following utilities is best suited for this purpose?

A. NBTSTAT

B. Performance Monitor

C. NETSTAT

D. Network Monitor

E. DHCP Management Console

 Answer Option D

31. A software that allows a personal computer to pretend it as a terminal is

A. auto-dialing

B. bulletin board

C. modem

D. terminal emulation

E. None of the above

 Answer Option A

32. What is the name of the network topology in which there are bi-directional links between each possible node?

A. Ring

B. Star

C. Tree

D. Mesh

E. None of the above

 Answer Option D

33. What is the main purpose of a data link content monitor?

A. to detect problems in protocols

B. to determine the type of transmission used in a data link

C. to determine the type of switching used in a data link.

D. to determine the flow of data

 Answer Option A

34. Synchronous protocols

A. transmit characters one at a time

B. allow faster transmission than asynchronous protocols do

C. are generally used by personal computers

D. are more reliable

E. None of the above

 Answer Option B

35. To set up a bulletin board system you need

A. a smart modem with auto-answer capabilities

B. a telephone line

C. a personal computer

D. All of the above

E. None of the above

 Answer Option D

36. Videotex is a combination of

A. television

B. communication

C. computer technology

D. All of the above

E. None of the above

 Answer Option D

37. Which of the following frequency ranges is used for AM radio transmission?

A. Very Low Frequency : 3 kHz to 30 kHz

B. Medium Frequency : 300 kHz to 3 MHz

C. High Frequency : 3 MHz to 30 MHz

D. Very High Frequency : 30 MHz to 300 MHz

E. None of the above

 Answer Option B

38. Baseband is

A. transmission of signals without modulation

B. a signal all of whose energy is contained within a finite frequency range

C. the simultaneous transmission of data to a number of stations

D. All of the above

E. None of the above

 Answer Option A

39. A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. Differential PCM with 4 bit relative signal value is used. Then how many bits per second are actually sent?

A. 32 Kbps

B. 64 Kbps

C. 8 Kbps

D. 128 Kbps.

 Answer Option A

40. X.21 is

A. a method of determining which device has access to the transmission medium at any time

B. a method access control technique for multiple-access transmission media

C. a very common bit-oriented data link protocol issued by ISO

D. network access standard for connecting stations to a circuit-switched network

E. None of the above

 Answer Option D

41. What is the minimum number of wires required for sending data over a serial communications links?

A. 2

B. 1

C. 4

D. 3

E. None of the above

 Answer Option A

42. In cyclic redundancy checking, the divisor is _____ the CRC.

A. the same size as

B. one bit less than

C. one bit more than

D. two bits more

 Answer Option C

43. Which command-line tool is included with every Microsoft TCP/IP client?

A. DHCP

B. WINS

C. PING

D. WINIPCFG

E. None of the above

 Answer Option C

44. If odd parity is used for ASCII error detection, the number of 0s per eight-bit symbol is _____.

A. even

B. odd

C. indeterminate

D. 42

 Answer Option B

45. An error-detecting code inserted as a field in a block of data to be transmitted is known as

A. Frame check sequence

B. Error detecting code

C. Checksum

D. flow control

 Answer Option A

46. Number of bits per symbol used in Baudot code is

A. 1

B. 5

C. 8

D. 9

E. None of the above

 Answer Option B

47. Working of the WAN generally involves

A. telephone lines

B. microwaves

C. satellites

D. All of the above

E. None of the above

 Answer Option D

48. What does the acronym ISDN stand for?

A. Indian Standard Digital Network

B. Integrated Services Digital Network

C. Intelligent Services Digital Network

D. Integrated Services Data Network

E. None of the above

 Answer Option B

49. Which of the following services dynamically resolves NetBIOS-to-IP resolution?

A. DNS

B. DHCP

C. WINS

D. LMHOSTS

E. None of the above

 Answer Option C

50. An example of a medium-speed, switched communications service is

A. Series 1000

B. Dataphone 50

C. DDD

D. All of the above

E. None of the above

 Answer Option C