Q.1

The dialogue techniques for terminal use do not include

  • questions and answers
  • open-ended questions
  • form fillings
  • menu display
  • None of the above
Q.2

You are working with a network that has the network ID 172.16.0.and you requiresubnets for your company and an additionalfor the company that will merge with you within a month. Each network will contain approximatelynodes. What subnet mask should you assign?

  • 255.255.192.0
  • 255.255.224.0
  • 255.255.240.0
  • 255,255.248.0
  • 255.255.252.0
Q.3

Communication between computers is almost always

  • serial
  • parallel
  • series parallel
  • direct
  • None of the above
Q.4

Which of the following is considered a broadband communications channel?

  • coaxial cable
  • fiber optic cable
  • microwave circuits
  • satellites systems
  • All of the above
Q.5

What is the port number for POP3?

  • 110
  • 90
  • 80
  • 49
Q.6

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?

  • Token-Ring
  • CSMA/CD
  • Ethernet
  • CSMA/CA
  • ARCnet
Q.7

A teleprocessing system may consist of

  • user systems
  • communications systems
  • computer center systems
  • All of the above
  • None of the above
Q.8

You are working with a network that has the network ID 192.168.10.What subnet should you use that supports up tohosts and a maximum number of subnets?

  • 255.255.255.192
  • 255.255.255.224
  • 255.255.255. 240
  • 255.255.255.248
  • 255.255.255.252
Q.9

A distributed data processing configuration in which all activities must pass through a centrally located computer is called a:

  • ring network
  • spider network
  • hierarchical network
  • data control network
  • None of the above
Q.10

The main difference between TCP and UDP is

  • UDP is connection oriented where as TCP is datagram service
  • TCP is an Internet protocol where as UDP is an ATM protocol
  • UDP is a datagram where as TCP is a connection oriented service
  • All of the above
Q.11

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

  • on the item
  • on the item and on the shelf
  • in computer storage
  • on the shelf and in computer storage
  • None of the above
Q.12

Bulletin board system

  • is a public access message system
  • is a modem capable of accepting commands
  • converts analog signals to digital signals
  • converts digital signals to analog signals
  • None of the above
Q.13

A batch processing terminal would not include a

  • CPU
  • card reader
  • card punch
  • line printer
  • None of the above
Q.14

Data communications monitors available on the software market include

  • ENVIRON/1
  • TOTAL
  • BPL
  • Telenet
  • None of the above
Q.15

Which of the following statement is correct?

  • 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.
  • A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun
  • Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations.
  • satellite transponders use a single frequency for reception and transmission from one point on earth to another
  • None of the above
Q.16

Which of the following summation operation is performed on the bits to check an error-detecting code?

  • Codec
  • Coder-decoder
  • Checksum
  • Attenuation
  • None of the above
Q.17

You are working with a class C network. You are required to configure it for five subnets, each of which will supportnodes. What subnet should you use?

  • 255.255.255.0
  • 255.255.255.224
  • 255.255.255.240
  • 255.255.255.248
  • 255.255.255.252
Q.18

A network designer wants to connect 5 routers as point-to-point simplex line. Then the total number of lines required would be

  • 5
  • 10
  • 20
  • 32
  • None of the above
Q.19

Typewriter terminals can print computer-generated data at a rate of

  • 10 characters per second
  • 120 characters per second
  • 120 characters per minute
  • 1200 characters per minute
  • None of the above
Q.20

To avoid transmission errors, a check figure is calculated by the

  • transmitting computer
  • receiving computer
  • both (a) and (b)
  • Start and stop bit
  • None of the above
Q.21

Which of the following items is not used in Local Area Networks (LANs)?

  • Computer
  • Modem
  • Printer
  • Cable
  • None of the above
Q.22

The _____ layer is the layer closest to the transmission medium.

  • transport
  • network
  • data link
  • physical
  • None of the above
Q.23

What is the name of the device that connects two computers by means of a telephone line?

  • Tape
  • modem
  • bus
  • cable
  • None of the above
Q.24

The network layer, in reference to the OSI model, provide

  • data link procedures that provide for the exchange of data via frames that can be sent and received
  • the interface between the X.25 network and packet mode device
  • the virtual circuit interface to packet-switched service
  • All of the above
  • None of the above
Q.25

You have a network ID of 192.168.10.0 and require at leasthost IDs for each subnet, with the largest amount of subnets available. Which subnet mask should you assign?

  • 255.255.255.192
  • 255.255.255.224
  • 255.255.255.240
  • 255.255.255.248
  • 255.255.255.255
Q.26

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

  • TELNET
  • NFS
  • FTP
  • DNS
  • None of the above
Q.27

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.

  • P I (K + 1)
  • KIK (1 + F)
  • 1/ (1 - F)
  • K I (K - P)
  • None of the above
Q.28

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

  • Internet Protocol (IP) ARPANET
  • X. 25 Packet Level Protocol (PLP) - ISO
  • Source routing and Domain naming - Usenet
  • X.25 level 2 - ISO
  • None of the above
Q.29

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

  • X.3
  • X.21
  • X.25
  • X.75
  • None of the above
Q.30

Which of the following statements is incorrect?

  • Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.
  • HDLC is a standard synchronous communication protocol.
  • 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.
  • RTS/CTS is the way the terminal indicates ringing
  • None of the above
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