Computer Science - Networking MCQs Part 4

1. What protocol is used between E-Mail servers?

A.
FTP

B.
SMTP

C.
SNMP

D.
POP3

 Answer Option B

2. If you configure the TCP/IP address and other TCP/IP parameters manually, you can always verify the configuration through which of the following? Select the best answer.

A.
Network Properties dialog box

B.
Server Services dialog box

C.
DHCPINFO command-line utility

D.
Advanced Properties tab of TCP/ IP Info.

E.
None of the above

 Answer Option A

3. In a PC to telephone hookup for long distance communication, modem is connected between the telephone line and

A.
PC

B.
synchronous port

C.
crossover cable

D.
asynchronous port

E.
None of the above

 Answer Option D

4. Which of the following communications service provides message preparation and transmission facilities?

A.
Teletex

B.
Teletext

C.
x400

D.
Fax

E.
None of the above

 Answer Option A

5. Four bits are used for packet sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size?

A.
4

B.
8

C.
15

D.
16

E.
None of the above

 Answer Option C

6. A hard copy would be prepared on a

A. typewriter terminal

B. line printer

C. plotter

D. All of the above

E. None of the above

 Answer Option D

7. Which of the following device copies electrical signals from one Ethernet to another?

A. bridge

B. repeater

C. hub

D. passive hub

E. None of the above

 Answer Option B

8. Stephanie is in charge of a small network and wants to make it simple but secure. The users want to have full control over their data and still be able to share data with the rest of the office. The networking knowledge of the office staff is basic. Which network(s) would be the best for Stephanie to set up?

A. Peer-to-peer

B. Master domain

C. Server-based

D. WAN

E. Share-level

 Answer Option C

9. When UPC is used, the price of the item is located

A. on the item

B. on the item and on the shelf

C. in computer storage

D. on the shelf and in computer storage

E. None of the above

 Answer Option D

10. Error control is needed at the transport layer because of potential errors occurring _____.

A. from transmission line noise

B. in routers

C. from out-of-sequence delivery

D. from packet losses.

 Answer Option B

11. The transport layer protocol is connectionless.

A. NVT

B. FTP

C. TCP

D. UDP

E. None of the above

 Answer Option D

12. The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

A. universal accessibility for private network Data Terminal Equipment (DTE)

B. adequate cost control mechanisms for administration of the private networks

C. to assign address to private network DTEs

D. a and b both

E. None of the above

 Answer Option D

13. Communication between computers is almost always

A. serial

B. parallel

C. series parallel

D. direct

E. None of the above

 Answer Option A

14. Which of the following is considered a broadband communications channel?

A. coaxial cable

B. fiber optic cable

C. microwave circuits

D. satellites systems

E. All of the above

 Answer Option E

15. Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost.

A. P I (K + 1)

B. KIK (1 + F)

C. 1/ (1 - F)

D. K I (K - P)

E. None of the above

 Answer Option C

16. Which of the following characteristics is not true of NetBEUI?

A. Highly-customizable

B. Routable

C. Little configuration required

D. Fast for small networks to Self-tuning

 Answer Option B

17. The difference between a multiplexer and a statistical multiplexer is

A. Statistical multiplexers need buffers while multiplexers do not need buffers

B. Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol

C. Multiplexers often waste the output link capacity while statistical multiplexers optimize its use

D. Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

E. None of the above

 Answer Option A

18. You are trying to decide which type of network you will use at your office, and you want the type that will provide communication and avoid collisions on the cable. Which of the following is the best choice?

A. Token-Ring

B. CSMA/CD

C. Ethernet

D. CSMA/CA

E. ARCnet

 Answer Option A

19. Which of the following network access standard is used for connecting stations to a packet-switched network?

A. X.3

B. X.21

C. X.25

D. X.75

E. None of the above

 Answer Option C

20. Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

A. TCP/IP

B. Protocol

C. Open Systems

D. Internetwork processor

 Answer Option D

21. A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as

A. Attenuation

B. Amplitude

C. Aloha

D. Carrier

E. None of the above

 Answer Option A

22. The term "remote job entry" relates to

A. batch processing

B. realtime processing

C. transaction processing

D. distributed processing

E. None of the above

 Answer Option A

23. Which of the following performs modulation and demodulation?

A. fiber optic

B. satellite

C. coaxial cable

D. modem

E. None of the above

 Answer Option D

24. Data communications monitors available on the software market include

A. ENVIRON/1

B. TOTAL

C. BPL

D. Telenet

E. None of the above

 Answer Option A

25. Which of the following statement is correct?

A. A spin stabilized satellite used solar cells mounted on a cylinder body that continuously rotates so that 40 a time and it also uses gyroscopic action of a spinning satellite to maintain its orientation towards the earth and the sun.

B. A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun

C. Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations.

D. satellite transponders use a single frequency for reception and transmission from one point on earth to another

E. None of the above

 Answer Option A

26. What is the default subnet mask for a class A network?

A. 127.0.0.1

B. 255.0.0.0

C. 255.255.255.0.0

D. 255.255.255.0

E. None of the above

 Answer Option B

27. When using the loopback address, if TCP/IP is installed correctly, when should you receive a response?

A. Immediately

B. Only if the address fails

C. After the next host comes online

D. Within two minutes

E. None of the above

 Answer Option A

28. Which of the following statement is correct?

A. Satellite transponders contain a receiver and transmitter designed to relay microwave transmissions from one point on earth to another.

B. Satellite transponders contain a device that echos the radiation without change from one point on earth to another.

C. Satellite transponder contains devices that transform the message sent from one location on earth to a different code for transmission to another location.

D. Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations

E. None of the above

 Answer Option A

29. The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the best fit for answer:

A. Internetworked enterprise

B. Information super highway

C. Business applications of telecommunications

D. Client/Server networks

E. None of the above

 Answer Option A

30. The data communication support should include, but is not restricted to

A. file transfer and transaction processing

B. file and database access

C. terminal support, electronic mail and voice grams.

D. All of the above

 Answer Option D

31. MAC is

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

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

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

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

E. None of the above

 Answer Option A

32. What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

A. Teleport

B. Modem

C. Multiplexer

D. Concentrator

E. None of the above

 Answer Option B

33. You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

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

34. Which application allows a user to access and change remote files without actual transfer?

A. TELNET

B. NFS

C. FTP

D. DNS

E. None of the above

 Answer Option B

35. Parity bit 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 specific 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 errors in detected

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

E. None of the above

 Answer Option B

36. Which of the following file retrieval methods use hypermedia?

A. HTTP

B. WAIS

C. Veronica

D. Archie

E. None of the above

 Answer Option A

37. Which IP address class has few hosts per network?

A. D

B. C

C. B

D. A

E. None of the above

 Answer Option B

38. Microprogramming is

A. assembly language programming

B. programming of minicomputers

C. control unit programming

D. macro programming of microcomputers

E. None of the above

 Answer Option C

39. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 12 hosts and a maximum number of subnets?

A. 255.255.255.192

B. 255.255.255.224

C. 255.255.255. 240

D. 255.255.255.248

E. 255.255.255.252

 Answer Option C

40. Which of the following statements is incorrect?

A. Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.

B. HDLC is a standard synchronous communication protocol.

C. RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data.

D. RTS/CTS is the way the terminal indicates ringing

E. None of the above

 Answer Option D

41. If communication software can be called the "traffic cop" of a micro communication system, then what should the modem be called?

A. Park

B. Bridge

C. Interface

D. Link

E. None of the above

 Answer Option B

42. Which of the following specifies the network address and host address of the computer?

A. The IP address

B. The TCP address

C. The subnet mask

D. The default gateway

E. None of the above

 Answer Option A

43. For connecting modem, a computer must be equipped with a port that conforms to the RS-232 standard of the Electronic Industries Association of America. What do the letters 'RS' stand for?

A. Recognised standard

B. Random sequence

C. Recommended standard

D. Registered source

E. None of the above

 Answer Option C

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

A. bus network

B. ring network

C. star network

D. T-switched network

E. None of the above

 Answer Option D

45. What is the port number for POP3?

A. 110

B. 90

C. 80

D. 49

 Answer Option A

46. Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages selectively?

A. SMTP

B. DHCP

C. IMAP

D. POP3

 Answer Option D

47. On a class C network with a subnet mask of 192, how many subnets are available?

A. 254

B. 62

C. 30

D. 14

E. 2

 Answer Option E

48. Ethernet and Token-Ring are the two most commonly used network architectures in the world. Jim has heard of the different topologies for networks and wants to choose the architecture that will provide him with the most options. Which of the following would that be? Choose the most correct answer.

A. Token-Ring because it currently can run at both 4Mbps and 16Mbps. This means that it can be used in any topology

B. Ethernet, because it is cabled using fiber-optic cable

C. Token-Ring, because it uses a MAU

D. Ethernet, because it can be set up with most topologies and can use multiple transfer speeds

E. Neither Token-Ring nor Ethernet is the proper choice. Only ARCnet can be used in all topologies

 Answer Option D

49. A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.

A. 500 Kbps

B. 32 Kbps

C. 8 Kbps

D. 64 Kbps.

 Answer Option D

50. How can you see the address of the DHCP server from which a client received its IP address?

A. By using Advanced Properties of TCP/IP

B. By using IPCONFIG/ALL

C. By using DHCPINFO

D. By pinging DHCP

E. None of the above

 Answer Option B