MCQ Exam Test

Q1

What is the main difference between DDCMP and SDLG?

A DDCMP does not need special hardware to final the beginning of a message.
B DDCMP has a message header
C SDLC has a IP address
D SDLC does not use CRC

Q2

A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

A Aloha
B Angle modulation
C Amplitude modulation
D modem

Q3

CSMA (Carrier Sense Multiple Access) is

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

Q4

End-to-end connectivity is provided from host-to-host in:

A Network layer
B Session layer
C Data link layer
D Transport layer

Q5

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

A compartment
B time-shared program
C divided core
D partition

Q6

Which of the following is not a standard synchronous communication protocol?

A SDLC
B SMTP
C SLIP
D PAS

Q7

RS-232-G

A is an interface between two data circuit terminating equipment as examplified by a local and remote modem
B is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
C specifies only the mechanical characteristics of an interface by providing a 25-pin connector
D requires only 7 pin out of 25 in order to transmit digital data over public telephone lines

Q8

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

A a set of physical layer standards developed by EIA and intended to replace RS-232-C.
B a check bit appended to an array of binary digits to make the sum of the all the binary digits
C 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
D the ratio of the number of data units in error to the total number of data units

Q9

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

A 2
B 6
C 30
D 62

Q10

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

A data link procedures that provide for the exchange of data via frames that can be sent and received
B the interface between the X.25 network and packet mode device
C the virtual circuit interface to packet-switched service
D All of the above

Q11

The standard suit of protocols used by the Internet, intranets, extranets, and some other networks.

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

Q12

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

A Computer
B Modem
C Printer
D Cable

Q13

Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of topology?

A Linear bus
B Modified star
C Modified ring
D Ring

Q14

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

A Codec
B Coder-decoder
C Checksum
D Attenuation

Q15

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

A 128 - 255
B 1 - 127
C 192 - 223
D 128 - 191

Q16

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

A narrowband channels
B simplex lines
C full-duplex lines
D mixed band channels

Q17

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

A transmitting computer
B receiving computer
C both A and B
D Start and stop bit

Q18

Which of the following digits are known as the area code of the Network User Address (NUA)?

A 05-Jul
B 01-Apr
C 08-Dec
D 13-14

Q19

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

A 1 - 126
B 192 - 255
C 192 - 223
D 1 - 127

Q20

Error detection at a data link level is achieved by

A bit stuffing
B cyclic redundancy codes
C Hamming codes
D equalization

Q21

In OSI network architecture, the routing is performed by

A network layer
B data link layer
C transport layer
D session layer

Q22

In a _____ topology, if there are n devices in a network, each device has n - 1 ports for cables.

A ring
B bus
C star
D mesh

Q23

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

A 10 characters per second
B 120 characters per second
C 120 characters per minute
D 1200 characters per minute

Q24

Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

A Network collisions occur
B Repeaters cannot increase the signal strength sufficiently
C Cable terminators do not reflect the signal properly
D Cable terminators do not absorb the signal properly

Q25

The 32-bit internet address 10000000 00001010 00000010 00011110 will be written in dotted decimal notation as

A 148.20.2.30
B 164.100.9.61
C 210.20.2.64
D 128.10.2.30

basic - Part 12

What is the main difference between DDCMP and SDLG?

A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

CSMA (Carrier Sense Multiple Access) is

End-to-end connectivity is provided from host-to-host in:

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

Which of the following is not a standard synchronous communication protocol?

RS-232-G

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

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

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

The standard suit of protocols used by the Internet, intranets, extranets, and some other networks.

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

Networks that follow the 802.5 standard appear to be in a star topology but are actually operating in what type of topology?

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

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

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

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

Which of the following digits are known as the area code of the Network User Address (NUA)?

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

Error detection at a data link level is achieved by

In OSI network architecture, the routing is performed by

In a _____ topology, if there are n devices in a network, each device has n - 1 ports for cables.

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

Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

The 32-bit internet address 10000000 00001010 00000010 00011110 will be written in dotted decimal notation as

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