Q.1

An encyclopedic database

  • is an information utility that specializes in storing and searching information
  • is generally free
  • is easy for beginners to use
  • All of the above
  • None of the above
Q.2

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

  • FSK; PSK
  • PSK; FSK
  • analog; digital
  • digital; analog
  • None of the above
Q.3

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

  • auto-dialing
  • bulletin board
  • modem
  • terminal emulation
  • None of the above
Q.4

Bus is

  • one or more conductors that some as a common connection for a related group of devices
  • a continuous frequency capable of being modulated or impressed with a second signal
  • the condition when two or more stations attempt to use the same channel at the same time
  • a collection of interconnected functional units that provides a data communications service among stations attached to the network
  • None of the above
Q.5

Which of the following refers to the terms "residual error rate"?

  • the number of bit errors per twenty four hours of continuous operation on an asynchronous line
  • The probability that one or more errors will be undetected when an error detection scheme is used
  • the probability that one or more errors will be detected when an error detection mechanism is used
  • signal to noise ratio divided by the ratio of energy per bit to noise per hertz
  • None of the above
Q.6

Modem is used in data transmission. When was it invented and in which country?

  • 1963, USA
  • 1965, Germany
  • 1950, USA
  • 1950, Japan
  • None of the above
Q.7

What protocol is used between E-Mail servers?

  • FTP
  • SMTP
  • SNMP
  • POP3
Q.8

In a synchronous modem, the receive equalizer is known as

  • adaptive equalizer
  • impairment equalizer
  • statistical equalizer
  • compromise equalizer
  • None of the above
Q.9

Which of the following is an example of a client-server model?

  • TELNET
  • FTP
  • DNS
  • All of the above
  • None of the above
Q.10

The birthplace of the World Wide Web is considered to be

  • the Department of Defense
  • CERN
  • ARPA
  • Netscape
  • None of the above
Q.11

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?

  • Fast SCSI Wide
  • Token-Ring
  • ArcServe
  • Ethernet
  • None of the above
Q.12

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

  • Ring
  • Star
  • Tree
  • Mesh
  • None of the above
Q.13

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

  • Coaxial cable
  • optic fiber
  • CATV
  • UTP
  • None of the above
Q.14

In cyclic redundancy checking what is the CRC?

  • the divisor
  • the quotient
  • the dividend
  • the remainder
Q.15

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

  • Codec
  • Coder-decoder
  • Checksum
  • Attenuation
Q.16

The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband.

  • Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
  • Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
  • Baseband refers to local area networks, and broadband refers to wide area networks.
  • Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
  • Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Q.17

Which of the following technique is used for Time-To-Line (TTL)?

  • a technique used in best-effort delivery system to avoid endlessly looping packets.
  • a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame
  • One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size.
  • All of the above
  • None of the above
Q.18

Communication network is

  • one or more conductors that serve as a common connection for a related group of devices
  • a continuous frequency capable of being modulated or impressed with a second signal
  • the condition with two or more stations attempt to use the same channel at the same time
  • a collection of interconnected functional units that provides a data communications service among stations attached to the network
  • None of the above
Q.19

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.

  • Network Properties dialog box
  • Server Services dialog box
  • DHCPINFO command-line utility
  • Advanced Properties tab of TCP/ IP Info.
  • None of the above
Q.20

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

  • PC
  • synchronous port
  • crossover cable
  • asynchronous port
  • None of the above
Q.21

Alex is required to provide information on how many people are using the network at any one time. Which network will enable him to do so?

  • Server-based
  • Token-Ring
  • Ethernet
  • Star
  • Peer-to-peer
Q.22

Now-a-days computers all over the world can talk to each other. Which is one of the special accessories essential for this purpose?

  • Keyboard
  • Modem
  • Scanner
  • Fax
  • None of the above
Q.23

In CRC there is no error if the remainder at the receiver is _____.

  • the quotient at the sender
  • nonzero
  • zero
  • equal to the remainder at the sender
  • None of the above.
Q.24

A WATS arrangement

  • is always less expensive than flat-rate service
  • is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
  • is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
  • is never less expensive than flat-rate service
  • None of the above
Q.25

FDDI is a

  • ring network
  • star network
  • mesh network
  • bus based network
  • None of the above
Q.26

Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?

  • Interface
  • Modem
  • Attenuation
  • Teleprocessor
  • None of the above
Q.27

A 8-Mbps token ring has a token holding timer value ofmsec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?

  • 8000 B frame
  • 80,000 B frame
  • 8 x 105 bit frame
  • 10,000 B frame
Q.28

What is the loopback address?

  • 127.0.0.1
  • 255.0.0.0
  • 255.255.0.0
  • 255.255.255.255.0
  • None of the above
Q.29

An ROP would be attached to a

  • simplex channel
  • duplex channel
  • half duplex channel
  • full duplex channel
  • None of the above
Q.30

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

  • to detect problems in protocols
  • to determine the type of transmission used in a data link
  • to determine the type of switching used in a data link.
  • to determine the flow of data
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