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

an error-detecting code based on a summation operation performed on the bits to be checked.

a check bit appended to an array of binary digits to make the sum of 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

Practice Networking Miscellaneous Multiple Choice Questions Quiz-10

Q.1

The channel in the data communication model can be

postal mail service
telephone lines
radio signals
All of the above
None of the above

Q.2

Which of the following is an important characteristic of LAN?

application independent interfaces
unlimited expansion
low cost access for low bandwidth channels
parallel transmission
None of the above

Q.3

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.4

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

2 seconds
20 seconds
120 seconds
12 seconds
None of the above

Q.5

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?

Handshaking
Modem options
Protocol
Duplexing
None of the above

Q.6

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

Fiber optic cables
Cellular phone systems
Telecommunications processors
Telecommunications software

Q.7

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

Ping the broadcast address
Ping the Microsoft Web site
Ping a distant router.
Ping the address of the local host
None of the above

Q.8

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

front-end processor
multiplexer
controller
concentrator
All of the above

Q.9

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

modem
interface card
special wires
telephone lines
None of the above

Q.10

Which utility is useful for troubleshooting NetBIOS name resolution problems?

NBTSTAT
Netstat
PING
Hostname
None of the above

Q.11

The EIA-232 interface has _____ pins.

20
24
25
30
None of the above

Q.12

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

An additional token is added for every 1,000 nodes
The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500
The network becomes less efficient
After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device
The network becomes more efficient

Q.13

A characteristic of a multiprogramming system is:

simultaneous execution of program instructions from two applications
concurrent processing of two or more programs
multiple CPUs
All the above
None of the above

Q.14

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

RARP
ARP
IGMP
ICMP
None of the above

Q.15

Which multiplexing technique shifts each signal to a different carrier frequency?

FDM
synchronous TDM
asynchronous TDM
All of the above

Q.16

Which of the following protocol is connection-oriented?

IPX
UDP
NetBEUI
TCP

Q.17

The loss in signal power as light travels down the fiber is called

attenuation
propagation
scattering
interruption
None of the above

Q.18

Operating system functions may include

input/output control
virtual storage
multiprogramming
All of the above
None of the above

Q.19

Which layer of international standard organization's OSI model is responsible for creating and recognizing frame boundaries?

physical layer
data link layer
transport layer
network layer
None of the above

Q.20

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.21

Bandlimited signal is

transmission of signals without modulation
a signal all of whose energy is contained within a finite frequency range
simultaneous transmission of data to a number of stations
All of the above
None of the above

Q.22

Computers in a LAN can be interconnected by radio and infrared technologies.

Wireless LANs
Network Topologies
Multiplexer
Modem
255.255.255.255

Q.23

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.24

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.25

Which of the following characteristics is not true of NetBEUI?

Highly-customizable
Routable
Little configuration required
Fast for small networks to Self-tuning
None of the above

Q.26

The difference between a multiplexer and a statistical multiplexer is

Statistical multiplexers need buffers while multiplexers do not need buffers
Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
None of the above

Q.27

Error rate is

an error-detecting code based on a summation operation performed on the bits to be checked.
a check bit appended to an array of binary digits to make the sum of 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
the ratio of the number of data units in error to the total number of data units
None of the above

Q.28

Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

Network Server
Virtual Private Network
Network operating system
OSI

Q.29

Which of the following is considered a broadband communications channel?

coaxial cable
fiber optic cable
microwave circuits
satellites systems
All of the above

Q.30

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