MCQ Exam Test

Q1

The data-link layer, in reference to the OSI model, specifies

A data link procedures that provide for the exchange of data via frames that can be sent and received
B the interface between the X.25 network and packet mode device
C the virtual circuit interface to packet-switched service
D All of the above

Q2

A characteristic of a multiprogramming system is:

A simultaneous execution of program instructions from two applications
B concurrent processing of two or more programs
C multiple CPUs
D All the above

Q3

ASK, PSK, FSK, and QAM are examples of _____ encoding.

A digital-to-digital
B digital-to-analog
C analog-to-analog
D analog-to-digital

Q4

Different computers are connected to a LAN by a cable and a/an

A modem
B interface card
C special wires
D telephone lines

Q5

What frequency range is used for TV transmission and low power microwave applications?

A Very Low Frequency : 3 kHz to 30 kHz
B Medium Frequency : 300 kHz to 3 MHz
C Ultra High Frequency : 300 MHz to 3000 MHz
D Super High Frequency : 3000 MHz to 30000 MHz

Q6

Which of the following is a wrong example of network layer:

A Internet Protocol (IP) ARPANET
B X. 25 Packet Level Protocol (PLP) - ISO
C Source routing and Domain naming - Usenet
D X.25 level 2 - ISO

Q7

Which of the following might be used by a company to satisfy its growing communications needs?

A front-end processor
B multiplexer
C controller
D All of the above

Q8

We can receive data either through our television aerial or down our telephone lines and display this data on our television screen. What is the general name given to this process?

A Viewdata
B Teletext
C Telesoftware
D Videotex

Q9

The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer

A An additional token is added for every 1,000 nodes
B The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500
C The network becomes less efficient
D The network becomes more efficient

Q10

Telecommunications networks come in a wide range of speed and capacity capabilities. Select the best fit for answer:

A Bandwidth alternatives
B Switching alternating
C Inter organizational networks
D Extranets

Q11

In OSI model, which of the following layer transforms information from machine format into that understandable by user

A application
B presentation
C session
D physical

Q12

After you have verified that TCP/IP is installed correctly, what is the next step in verifying the TCP/IP configuration?

A Ping the broadcast address
B Ping the Microsoft Web site
C Ping a distant router.
D Ping the address of the local host

Q13

A 2000-character text file has to be transmitted by using a 1,200 baud modem. Can you tell how long will it take?

A 2 seconds
B 20 seconds
C 120 seconds
D 12 seconds

Q14

A modem is connected in between a telephone line and a

A network
B computer
C communication adapter
D serial port

Q15

You need to determine whether IP information has been assigned to your Windows NT. Which utility should you use?

A NBTSTAT
B NETSTAT
C IPCONFIG
D WINIPCFG

Q16

What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?

A Handshaking
B Modem options
C Protocol
D Duplexing

Q17

What function does a serial interface perform in data communication?

A Converts serial data into audio signals
B Converts analog signals into digital signals
C Converts parallel data into a stream of bits
D Decodes incoming signals into computer data

Q18

When a host knows its physical address but not its IP address, it can use _____.

A RARP
B ARP
C IGMP
D ICMP

Q19

Which of the following statements is correct?

A characteristic of the hub architecture of ARC-net is alternative routing.
B characteristic of LAN is unlimited expansion
C characteristic of LAN is low cost access for low bandwidth channels
D characteristic of the hub architecture of ARC-net is directionalized transmission

Q20

The EIA-232 interface has _____ pins.

A 20
B 24
C 25
D 30

Q21

A communications medium that uses pulses of laser light in glass fibers. Select the best fit for answer:

A Fiber optic cables
B Cellular phone systems
C Telecommunications processors
D Telecommunications software

Q22

Which utility is useful for troubleshooting NetBIOS name resolution problems?

A NBTSTAT
B Netstat
C PING
D Hostname

Q23

Which of the following statement is correct?

A Satellite transponders use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations.
B Satellite transponders contain a device that echos the radiation without change from one point on earth to another
C Satellite transponder contain devices that transform the message sent from one location on earth to a different code for transmission to another location
D satellite transponders us lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations

Q24

The channel in the data communication model can be

A postal mail service
B telephone lines
C radio signals
D All of the above

Q25

Which of the following is an important characteristic of LAN?

A application independent interfaces
B unlimited expansion
C low cost access for low bandwidth channels
D parallel transmission

basic - Part 18

The data-link layer, in reference to the OSI model, specifies

A characteristic of a multiprogramming system is:

ASK, PSK, FSK, and QAM are examples of _____ encoding.

Different computers are connected to a LAN by a cable and a/an

What frequency range is used for TV transmission and low power microwave applications?

Which of the following is a wrong example of network layer:

Which of the following might be used by a company to satisfy its growing communications needs?

We can receive data either through our television aerial or down our telephone lines and display this data on our television screen. What is the general name given to this process?

Telecommunications networks come in a wide range of speed and capacity capabilities. Select the best fit for answer:

In OSI model, which of the following layer transforms information from machine format into that understandable by user

After you have verified that TCP/IP is installed correctly, what is the next step in verifying the TCP/IP configuration?

A 2000-character text file has to be transmitted by using a 1,200 baud modem. Can you tell how long will it take?

A modem is connected in between a telephone line and a

You need to determine whether IP information has been assigned to your Windows NT. Which utility should you use?

What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end?

What function does a serial interface perform in data communication?

When a host knows its physical address but not its IP address, it can use _____.

Which of the following statements is correct?

The EIA-232 interface has _____ pins.

A communications medium that uses pulses of laser light in glass fibers. Select the best fit for answer:

Which utility is useful for troubleshooting NetBIOS name resolution problems?

Which of the following statement is correct?

The channel in the data communication model can be

Which of the following is an important characteristic of LAN?

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