Q.1

Which of the following allows devices on one network to communicate with devices on another network?

  • multiplexer
  • gateway
  • t-switch
  • modern
  • None of the above
Q.2

An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined binary number, is known as

  • Cyclic redundancy check
  • Checksum
  • Error detecting code
  • Error rate
  • None of the above
Q.3

A 4 KHz noise less channel with one sample everper sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?

  • 32 kbps
  • 8 kbps
  • 128 kbps
  • 64 kbps.
Q.4

A communications device that combines transmissions from severalO devices into one line is a:

  • concentrator
  • modifier
  • multiplexer
  • full-duplex line
  • None of the above
Q.5

Business meeting and conferences can be held by linking distantly located people through a computer network. Not only the participants exchange information but are able to see each other. What is it called?

  • Telemeeting
  • Telemailing
  • Teleconferencing
  • Teletalking
  • None of the above
Q.6

A communication network which is used by large organizations over regional, national or global area is called

  • LAN
  • WAN
  • MAN
  • Intranet
  • None of the above
Q.7

An information utility can offer a user

  • instant bonds and stock quotations
  • news stories from wire services
  • complete airline schedules for all domestic flights
  • All of the above
  • None of the above
Q.8

A subdivision of main storage created by operational software is referred to as a:

  • compartment
  • time-shared program
  • divided core
  • partition
  • None of the above
Q.9

On a class B network, how many subnets are available with a subnet mask of 248?

  • 2
  • 6
  • 30
  • 62
  • 126
Q.10

Which of the following communications lines is best suited to interactive processing applications?

  • narrowband channels
  • simplex lines
  • full-duplex lines
  • mixed band channels
  • None of the above
Q.11

Devices on one network can communicate with devices on another network via a

  • file server
  • utility server
  • printer server
  • gateway
  • None of the above
Q.12

In OSI network architecture, the dialogue control and token management are responsibilities of

  • session layer
  • network layer
  • transport layer
  • data link layer
  • None of the above
Q.13

A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?

  • hot potato routing
  • flooding
  • static routing
  • delta routing
  • None of the above
Q.14

A proposed network infrastructure of interconnected local, regional, and global networks that would support universal interactive multimedia communications. Select the best fit for answer:

  • Internetworked enterprise
  • Information super highway
  • Business applications of telecommunications
  • Client/Server networks
Q.15

Which of the following data transmission media has the largest terrestrial range without the use of repeaters or other devices?

  • Hardwiring
  • Microwave
  • Satellite
  • Laser
  • None of the above
Q.16

The CCITT Recommendation X.specifies three layers of communications:

  • application, presentation and session
  • Session, transport and network
  • physical datalink and network
  • datalink, network and transport
Q.17

Which of the following uses network address translation?

  • Routers
  • Network adapter drivers
  • Hubs
  • Windows 95
Q.18

RS-449/442-A/423-A is

  • a set of physical layer standards developed by EIA and intended to replace RS-232-C.
  • a check bit appended to an array of binary digits to make the sum of the all the binary digits
  • 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 is detected
  • the ratio of the number of data units in error to the total number of data units
  • None of the above
Q.19

Eight stations are competing for the use of the shared channel using the modified Adaptive free walk protocol by Gallager. If the stations 7 and 8 are suddenly become ready at once, how many bit slots are needed to resolve the contention?

  • 1 slots
  • 5 slots
  • 10 slots
  • 14 slots
Q.20

Which transmission mode is used for data communication along telephone lines?

  • Parallel
  • Serial
  • Synchronous
  • Asynchronous
  • None of the above
Q.21

UDP is:

  • Not a part of the TCP/IP suite
  • Connection oriented and unreliable
  • Connection orientated and reliable
  • Connectionless and unreliable
Q.22

The interactive transmission of data within a time sharing system may be best suited to

  • simplex lines
  • half-duplex lines
  • full-duplex lines
  • biflex-line
  • None of the above
Q.23

The main difference between synchronous and asynchronous transmission is

  • the clocking is derived from the data in synchronous transmission
  • the clocking is mixed with the data in asynchronous transmission
  • the pulse height is different.
  • the bandwidth required is different
  • None of the above
Q.24

What frequency range is used for microwave communications, satellite and radar?

  • Low Frequency : 30 kHz to 300 kHz
  • Medium Frequency : 300 kHz to 3 MHz
  • Super High Frequency : 3000 MHz to 30000 MHz
  • Extremely High Frequency :30,000 MHz
  • None of the above
Q.25

Which of the following statements is incorrect?

  • The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission
  • Half-duplex line is a communication line in which data can move in two directions, but not at the same time.
  • Teleprocessing combines telecommunications and DP techniques in online activities.
  • Batch processing is the preferred processing mode for telecommunication operations
  • None of the above
Q.26

Information systems with common hardware, software, and network standards that provide easy access for end users and their networked computer systems. Select the best fit for answer:

  • TCP/IP
  • Protocol
  • Open Systems
  • Internetwork processor
Q.27

Which of the following TCP/IP protocol is used for file transfer with minimal capability and minimal overhead?

  • RARP
  • FTP
  • TFTP
  • TELNET
  • None of the above
Q.28

An international standard, multilevel set of protocols to promote compatibility among telecommunications networks. Select the best fit for answer:

  • Network Server
  • Virtual Private Network
  • Network operating system
  • OSI
Q.29

Many large organizations with their offices in different countries of the world connect their computers through telecommunication satellites and telephone lines. Such a communication network is called

  • LAN
  • WAN
  • ECONET
  • EITHERNET
  • None of the above
Q.30

What is the first octet range for a class B IP address?

  • 128 - 255
  • 1 - 127
  • 192 - 223
  • 128 - 191
  • 127 - 191
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