MCQ Exam Test

Q1

What is the default subnet mask for a class A network?

A 127.0.0.1
B 255.0.0.0
C 255.255.255.0.0
D 255.255.255.0

Q2

A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as

A Attenuation
B Amplitude
C Aloha
D Carrier

Q3

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.

A P I (K + 1)
B KIK (1 + F)
C 1/ (1 - F)
D K I (K - P)

Q4

The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

A universal accessibility for private network Data Terminal Equipment (DTE)
B adequate cost control mechanisms for administration of the private networks
C to assign address to private network DTEs
D A and B both

Q5

Which of the following is considered a broadband communications channel?

A coaxial cable
B fiber optic cable
C microwave circuits
D All of the above

Q6

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?

A Token-Ring
B CSMA/CD
C Ethernet
D CSMA/CA

Q7

The data communication support should include, but is not restricted to

A file transfer and transaction processing
B file and database access
C terminal support, electronic mail and voice grams.
D All of the above

Q8

Which of the following statement is correct?

A 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 orientati
B A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun
C Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations.
D satellite transponders use a single frequency for reception and transmission from one point on earth to another

Q9

MAC is

A a method of determining which device has access to the transmission medium at any time
B a method access control technique or multiple-access transmission media
C a very common bit-oriented data link protocol issued to ISO.
D network access standard for connecting stations to a circuit-switched network

Q10

When using the loopback address, if TCP/IP is installed correctly, when should you receive a response?

A Immediately
B Only if the address fails
C After the next host comes online
D Within two minutes

Q11

Data communications monitors available on the software market include

A ENVIRON/1
B TOTAL
C BPL
D Telenet

Q12

The transport layer protocol is connectionless.

A NVT
B FTP
C TCP
D UDP

Q13

Error control is needed at the transport layer because of potential errors occurring _____.

A from transmission line noise
B in routers
C from out-of-sequence delivery
D from packet losses.

Q14

The difference between a multiplexer and a statistical multiplexer is

A Statistical multiplexers need buffers while multiplexers do not need buffers
B Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
C Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
D Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)

Q15

Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

A TCP/IP
B Protocol
C Open Systems
D Internetwork processor

Q16

What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

A Teleport
B Modem
C Multiplexer
D Concentrator

Q17

Which of the following characteristics is not true of NetBEUI?

A Highly-customizable
B Routable
C Little configuration required
D Fast for small networks to Self-tuning

Q18

Which of the following statement is correct?

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

Q19

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

A X.3
B X.21
C X.25
D X.75

Q20

Which of the following performs modulation and demodulation?

A fiber optic
B satellite
C coaxial cable
D modem

Q21

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

A on the item
B on the item and on the shelf
C in computer storage
D on the shelf and in computer storage

Q22

The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the best fit for answer:

A Internetworked enterprise
B Information super highway
C Business applications of telecommunications
D Client/Server networks

Q23

You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

A 255.255.192.0
B 255.255.224.0
C 255.255.240.0
D 255.255.252.0

Q24

Communication between computers is almost always

A serial
B parallel
C series parallel
D direct

Q25

The term "remote job entry" relates to

A batch processing
B realtime processing
C transaction processing
D distributed processing

computer-networking - Part 9

What is the default subnet mask for a class A network?

A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as

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.

The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

Which of the following is considered a broadband communications channel?

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?

The data communication support should include, but is not restricted to

Which of the following statement is correct?

MAC is

When using the loopback address, if TCP/IP is installed correctly, when should you receive a response?

Data communications monitors available on the software market include

The transport layer protocol is connectionless.

Error control is needed at the transport layer because of potential errors occurring _____.

The difference between a multiplexer and a statistical multiplexer is

Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

What is the name of the device that converts computer output into a form that can be transmitted over a telephone line?

Which of the following characteristics is not true of NetBEUI?

Which of the following statement is correct?

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

Which of the following performs modulation and demodulation?

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

The modern enterprise is interconnected internally and externally by the Internet, intranets, and other networks. Select the best fit for answer:

You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

Communication between computers is almost always

The term "remote job entry" relates to

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