شعبي ميوزك: ديسمبر 2014

Computer Fundamental Multiple Choice Question set-6

1) Different components on the motherboard of a PC unit are linked together by sets of parallel electrical conducting lines. What are these lines called?

A. Conductor's

B. Buses

C. Connectors

D. Consecutively

2) The ARPANET helped to develop protocol called .....

A. TCP/IP

B. POPA

C. ARP

D. None

3) The ALU of central processing unit does the essential math work for the computer. What does the control unit do .....

A. Communicate its results

B. Activates the output device

C. Monitors the flow of information

D. Control the printer

4) The language that the computer can understand and execute is called ....

A. Machine language

B. Application software

C. System program

D. All of the above

5) Boot virus affects the ......... of the program of a system.

A. Boot recorded program

B. Booting computer

C. Boot halted

D. None

6) Which of the following is not characteristic of a relational database model?

A. Tables

B. Treelike Structure

C. Complex logical relationships

D. Records

7) Who designed the first electronics computer ENIAC?

A. Van neumann

B. Joseph M jackquard

C. J. Presper Eckers and John W Mouchley

D. All of the above

8) The process of rewriting parts of a file to continuous sectors on a hard disk to increase the speed of access and retrieval.

A. Fragmentation

B. Defragmentation

C. Both

D. None

9) A language used to express algorithms in computer understandable form is ....

A. Assembly language

B. Low level language

C. Algorithmic language

D. Programming language

10) Instructions and memory addresses are represented by ..

A. Character codes

B. Binary codes

C. Binary words

D. Parity bit

11) Scandisk is performed by using .....

A. Application software

B. Operating system software

C. Utility software

D. None

12) BCD is

A. Bit Coded digit

B. Binary Coded Decimal

C. Bit Code digit

D. Binary Coded Digit

13) What is the name of the computer terminal, which gives paper printout?

A. Display screen

B. Soft-copy terminal

C. Hard copy terminal

D. Plotter

14) Optical fibers are very reliable communication channels and they transmit data in ....

A. Analog

B. Both

C. Digital

D. None

15) Chief components of first generation computer was ...

A. Transistors

B. Vacuum Tubes and Valves

C. Integrated Circuits

D. None of the above

16) The function of CPU is ....

A. to provide a hard copy

B. to read, interprets and processes the information and instruction

C. to communicate with the operator

D. to provide external storage of text

17) Copying file from Internet Server to client computer is called .....

A. Telnet

B. FTP

C. Internet copy

D. Message copy

18) Fifth Generation of Computer is also known as ....

A. Knowledge information processing system

B. Very large scale Integration

C. Both of the above

D. None of the above

19) What is meant by the term RAM?

A. Memory which can only be read

B. Memory which can be both read and written to

C. Memory which is used for permanent storage

D. Memory which can only be written to

20) Which is not the network operating system?

A. LINUX

B. UNIX

C. XENIX

D. MS-DOS

Answers:

1) B. Buses

2) C. ARP

3) C. Monitors the flow of information

4) A. Machine language

5) A. Boot recorded program

6) B. Treelike Structure

7) C. J. Presper Eckers and John W Mouchley

8) A. Fragmentation

9) A. Assembly language

10) B. Binary codes

11) B. Operating system software

12) B. Binary Coded Decimal

13) C. Hard copy terminal

14) C. Digital

15) B. Vacuum Tubes and Valves

16) B. to read, interprets and processes the information and instruction

17) B. FTP

18) A. Knowledge information processing system

19) B. Memory which can be both read and written to

20) D. MS-DOS

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Objective Questions and Answers on Computer Basis set-5

1) A computer Programmer ........

A. does all the thinking for a computer

B. can enter input data quickly

C. can operate all types of computer equipment

D. can draws only flowchart.

2) The first calculating device is ..........

A. Slide rule

B. Mark I

C. Pascaline

D. Abacus

3) A printed circuit board that adds additional capabilities and functions to a computer's hardware is ....

A. Expansion Board

B. Mother Board

C. Integrated circuit

D. Extended Board

4) The difference between memory and storage is that memory is ..... and storage is ......

A. Temporary, permanent

B. Permanent, temporary

C. Slow, fast

D. All of the above

5) Fifth generation computers will have ....

A. Ordinary Intelligence

B. Common Intelligence

C. Natural Intelligence

D. Artificial Intelligence

6) Which of the following can be used to control the movement of a cursor on a video screen?

A. Mouse

B. OCR

C. Card Punch

D. Joystick

7) Which was the computer conceive by Babbage?

A. Analytical engine

B. Arithmetic machine

C. Donald Knuth

D. All of the above

8) Super computer is also known as .......

A. Number Counter

B. Number Cashier

C. Number Crunchier

D. Number Displayer

9) A local storage register, which contains the address of the next instruction to be executed, is

A. Accumulator

B. Address register

C. Buffer

D. Memory

10) Microprocessors can be used to make

A. Computers

B. Digital Systems

C. Calculators

D. All of the above

11) IBM PC was established in .......

A. 1924 AD

B. 1824 AD

C. 1942 AD

D. 1928 AD

12) Printers are categorized according to ....

A. Whether the image produced is formed by physical contact of the print mechanism with paper

B. The number of characters printed in a minute

C. The size of computer that the printer is linked to

D. The application software needs of the user

13) Serial access memories are useful in applications where

A. Data consists of numbers

B. Short access time is required

C. Each stored word is processed differently

D. Data naturally needs to flow in an out in serial form.

14) Transistors were used in ......... generation computer.

A. First

B. Third

C. Second

D. Fourth

15) Linkage between the CPU and the users is provided by ....

A. Peripheral devices

B. Storage

C. Control Unit

D. Software

16) Registers, which are partially visible to users and used to hold conditional, are known as ...

A. PC

B. Memory address registers

C. General purpose register

D. Flags

17) ......... unit acts as a combination channel between user and a computer.

A. Input

B. Processing

C. Output

D. Storage

18) What is the generation of the computers which are built with VLSI technology and microprocessors?

A. Third

B. Fourth

C. Second

D. First

19) An integrated circuit is ..

A. A complicated circuit

B. An integrating device

C. Much costlier than a single chip

D. Fabricated on a tiny silicon chip

20) Which is the connector of coaxial cable?

A. RJ 45

B. DIX

C. BNC

D. None

Answers:

1) A. does all the thinking for a computer
2) D. Abacus
3) B. Mother Board
4) A. Temporary, permanent
5) D. Artificial Intelligence
6) D. Joystick
7) A. Analytical engine
8) C. Number Crunchier
9) B. Address register
10) D. All of the above
11) A. 1924 AD
12) A. Whether the image produced is formed by physical contact of the print mechanism with paper
13) D. Data naturally needs to flow in an out in serial form
14) C. Second
15) A. Peripheral devices
16) D. Flags
17) A. Input
18) B. Fourth
19) D. Fabricated on a tiny silicon chip
20) C. BNC

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Objective Questions on Application Layer in OSI/TCP/IP Model set-3

1) In a/an ........... of DNS resolver, instead of supplying a name and asking for an IP address, the DNS client provides the IP address and requests the corresponding host name.

A. Recursive queries

B. Iterative queries

C. Reverse queries

D. Inverse queries

2) For each resolved query, the DNS resolver caches the returned information for a time that is specified in each resource record in the DNS response. This is known as .........

A. Positive caching

B. Time To Live

C. Negative Caching

D. Reverse Caching

3) As originally defined in RFC 1134, .............. negative caching is the caching of failed name resolutions.

A. Positive caching

B. Time To Live

C. Negative Caching

D. Round Robin Load Balancing

4) ............... can reduce response times for names that DNS cannot resolve for both the DNS client and DNS servers during an iterative query process.

A. Positive caching

B. Time To Live

C. Negative Caching

D. Round Robin Load Balancing

5) The amount of time in seconds to cache the record data is referred to as the .........

A. Time To Cache

B. Time To Live

C. Time For Record

D. Time To Save

6) Which of the following issues arises, when multiple resource records for the same resource record type exist.

A. For the DNS server, how to order the resource records in the DNS Name Query Response message.

B. For the DNS client, how to choose a specific resource record in the DNS Name Query Response message.

C. Both of the above

D. None of the above.

7) To address the issues arises when multiple resource records for the same resource record type exist, RFC 1794 describes a mechanism named ................. to share and distribute loads for network resources.

A. Positive caching

B. Time To Live

C. Negative Caching

D. Round Robin Load Balancing

8) A ............ gets the data for its zones from locally stored and maintained files.

A. primary name server

B. secondary name server

C. ternary name server

D. primary name client

9) A ............. gets the data for its zones across the network from another name server.

A. primary name server

B. secondary name server

C. ternary name server

D. primary name client

10) The process of obtaining zone information across the network is referred to as a .........

A. zone obtaining

B. zone transfer

C. zone information

D. zone extracting

11) Which of the following is/are the reasons to have secondary name servers within an enterprise network.

A. Redundancy

B. Remote locations

C. Load distribution

D. All of the above

12) The source of the zone information for a secondary name server is referred to as a ..........

A. Name server

B. Primary Name Server

C. Master Name Server

D. Secondary Name Server

13) In .......... , when a name server receives a DNS query that it cannot resolve through its own zone files, it sends a recursive query to its forwarder.

A. exclusive mode

B. non-exclusive mode

C. caching mode

D. zonal mode

14) Which of the following is not the work done by a name server using a forwarder in exclusive mode, when attempting to resolve a name.

A. Checks its local cache

B. Checks its zone files

C. Sends a recursive query to a forwarder

D. Attempts to resolve the name through iterative queries to other DNS servers.

15) In ..........., name servers rely on the name-resolving ability of the forwarders.

A. exclusive mode

B. non-exclusive mode

C. caching mode

D. zonal mode

16) Name servers in ........... make no attempt to resolve the query on their own if the forwarder is unable to satisfy the request.

A. exclusive mode

B. non-exclusive mode

C. caching mode

D. zonal mode

17) ........... are DNS servers that only perform queries, cache the answers, and return the results.

A. Querying only server

B. Results only server

C. Caching only server

D. Information only server

18) In DNS resource records, ............ indicate primary and secondary servers for the zone specified in the SOA resource record, and they indicate the servers for any delegated zones.

A. SOA records

B. A records

C. MX records

D. NS records

19) In DNS resource records,......... specifies a mail exchange server for a DNS domain name.

A. SRV

B. MX

C. PTR

D. NS

20) In DNS resource records, .......... specifies the IP addresses of servers of a specific service, protocol and DNS domain.

A. SRV

B. MX

C. PTR

D. NS

Answers:

1) C. Reverse queries
2) A. Positive caching
3) C. Negative Caching
4) C. Negative Caching
5) B. Time To Live
6) C. Both of the above
7) D. Round Robin Load Balancing
8) A. primary name server
9) B. secondary name server
10) B. zone transfer
11) D. All of the above
12) C. Master Name Server
13) B. non-exclusive mode
14) D. Attempts to resolve the name through iterative queries to other DNS servers.
15) A. exclusive mode
16) A. exclusive mode
17) C. Caching only server
18) D. NS records
19) B. MX
20) A. SRV

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Solved MCQ on Application Layer in OSI/TCP/IP Model set-2

1) In MIME header field, ............. is a world unique value identifying the content of this part of this message.

A. content-type

B. content-transfer-encoding

C. content-description

D. content-id

2) The Post Office Protocol, version 3, is a standard protocol with STD number 53 and it is described in .....

A. RFC 1939

B. RFC 0937

C. RFC 2821

D. RFC 2822

3) .............. is an electronic mail protocol with both client and server functions.

A. SMTP

B. MIME

C. POP

D. TCP

4) In authentication state of POP3 server, ............ is used to specify a mechanism by which both authentication and data protection can be provided.

A. USER

B. PASS

C. APOP

D. AUTH

5) In transaction state of POP3 commands, .......... retrieve the number of messages and total size of the messages.

A. STAT

B. LIST

C. RETR

D. DELE

6) A MIME compliant message must contain a header field with the ........ verbatim text.

A. MIME-version:1.0

B. MIME-version:1.1

C. MIME-version:2.0

D. MIME-version:2.1

7) In ......... name space, a name is assigned to an address. It is a sequence of characters without structure.

A. hierarchical

B. sequential

C. flat

D. addressed

8) The main disadvantage of a ......... name space is that it cannot be used in a large system such as the internet because it may be centrally controlled to avoid ambiguity and duplication.

A. hierarchical

B. sequential

C. flat

D. addressed

9) The ......... protocol defines a set of messages sent over either User Datagram Protocol(UDP) port53 or Transmission Control Protocol(TCP) port53.

A. Name space

B. DNS

C. Domain space

D. Zone transfer

10) Primary specifications for DNS are defined in which of the following Request for Comments(RFCs)?

A. 974

B. 1034

C. 1035

D. All of the above

11) Which of the following is/are the components of DNS defined by RFC 1034?

A. The domain namespace and resource records

B. Name servers

C. Resolvers

D. All of the above

12) ............ are records in the DNS database that can be used to configure the DNS database server or to contain information of different types of process client queries.

A. Domain namespace

B. Resource records

C. Name servers

D. Resolvers

13) ........... store resource records and information about the domain tree structure and attempt to resolve received client queries.

A. Domain namespace

B. DNS Names

C. Name servers

D. Resolvers

14) ............ are programs that run on DNS clients and DNS servers and that create queries to extract information from name servers.

A. Domain namespace

B. Resource records

C. Name servers

D. Resolvers

15) ........... have a very specific structure, which identifies the location of the name in the DNS namespace.

A. Domain namespace

B. DNS Names

C. Name servers

D. Resolvers

16) A ................... is a DNS domain name that has been constructed from its location relative to the root of the namespace is known as the root domain.

A. Fully Qualified Domain Name(FQDN)

B. Fully Structured Domain Name(FSDN)

C. Fully Constructed Domain Name(FCDN)

D. Fully Rooted Domain Name(FRDN)

17) State whether the following statements are True or False for the attributes of Fully Qualified Domain Name(FQDN).

i) FQDN are case-sensitive

ii) A period character separates each name.

iii) The entire FQDN can not be no more than 255 characters long.

A. i-True, ii-True, iii-False

B. i-True, ii-False, iii-True

C. i-False, ii-True, iii-True

D. i-False, ii-True, iii-False

18) A ...... is a contiguous portion of a domain of the DNS namespace whose database records exist and managed in a particular DNS database file stored on one or multiple DNS servers.

A. Subdomain

B. Zone

C. Sub DNS

D. Sub zone

19) In a/an ........... of DNS resolver, the queried name server is requested to respond with the requested data or with an error stating that data of the requested type or the specified domain name does not exist.

A. Recursive queries

B. Iterative queries

c. Reverse queries

D. Inverse queries

20) In MIME header field, ......... is a plain text description of the object within the body, which is useful when the object is not human-readable.

A. content-type

B. content-transfer-encoding

C. content-description

D.content-id

Answers:

1) D. content-id
2) A. RFC 1939
3) C. POP
4) D. AUTH
5) A. STAT
6) A. MIME-version:1.0
7) C. flat
8) C. flat
9) B. DNS
10) D. All of the above
11) D. All of the above
12) B. Resource records
13) C. Name servers
14) D. Resolvers
15) B. DNS Names
16) A. Fully Qualified Domain Name(FQDN)
17) C. i-False, ii-True, iii-True
18) B. Zone
19) A. Recursive queries
20) C. content-description

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MCQ Questions on Application Layer in OSI/TCP/IP Model set-1

1) Which of the following is/are the important applications of application layer?

A. Electronic mail

B. World Wide Web

C. USENET

D. All of the above

2) The TCP/IP ............. corresponds to the combined session, presentation, and application layers of the OSI model.

A. session layer

B. presentation layer

C. application layer

D. None of the above

3) The .......... protocol is based on end-to-end delivery.

A. SMTP

B. TCP

C. IP

D. SCTP

4) The well-known port of SMTP server is ........

A. 110

B. 25

C. 50

D. 20

5) In SMTP header field, ............. is a summary of the message being sent which is specified by the sender.

A. Reply-to

B. Return-path

C. Subject

D. From

6) In SMTP herder field, .......... is added by the final transport system that deilvers the mail.

A. Reply-to

B. Return-path

C. Subject

D. From

7) In SMTP mail transaction flow, the sender SMTP establishes a TCP connection with the destination SMTP and then waits for the server to send a ..........

A. 220 service ready message

B. 421 service not available message

C. Both of the above

D. None of the above

8) In SMTP mail transaction flow, .......... is sent, to which the receiver will identify itself by sending back its domain name.

A. HELO

B. MAIL FROM

C. RCPT TO

D. DATA

9) ............ is a command-line tool designed for most UNIX-like operating systems, which does not define a method of transferring mail, but rather acts as a client/server that supports multiple mail protocols.

A. Recieivemail

B. Sendmail

C. MIME

D. POP

10) Which of the following is/are the components of sendmail?

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. All of the above

11) The ............ is the interface through which a user can read and send mail.

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. Mail send agent(MSA)

12) The ............ acts like a mail router, accepting messages from both MTAs and MUAs.

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. Mail send agent(MSA)

13) .......... uses a queuing system to manage inbound and outbound mail.

A. Recieivemail

B. Sendmail

C. MIME

D. POP

14) The sender SMTP establishes a TCP connection with the destination SMTP and then waits for the server to send a ...... service ready message.

A. 421

B. 320

C. 220

D. 120

15) ............ is limited to 7-bit ASCII text, with a maximum line length of 1000 characters.

A. SMTP

B. MIME

C. POP

D. MTA

16) A ........... message is one which can be routed through any number of networks that are loosely compliant with RFC2821 or are capable of transmitting RFC2821 messages.

A. SMTP

B. MIME

C. POP

D. MTA

17) There are ....... number of standard content types in MIME.

A. 5

B. 7

C. 9

D. 4

18) In MIME header field, ......... describes how the object within the body is to be interpreted.

A. content-type

B. content-transfer-encoding

C. content-description

D. content-id

19) In MIME header field, ............ describes how the object within the body was encoded in order that it be included in the message using a mail-safe form.

A. content-type

B. content-transfer-encoding

C. content-description

D. content-id

20) In a/an ............ of DNS resolver, the queried name server can return the best answer it currently has back to the DNS resolver.

A. Recursive queries

B. Iterative queries

c. Reverse queries

D. Inverse queries

Answers:

1) D. All of the above

2) C. application layer

3) A. SMTP

4) B. 25

5) C. Subject

6) B. Return-path

7) C. Both of the above

8) A. HELO

9) B. Sendmail

10) D. All of the above

11) A. Mail user agent(MUA)

12) B. Mail transfer agent(MTA)

13) B. Sendmail

14) C. 220

15) A. SMTP

16) B. MIME

17) B. 7

18) A. content-type

19) B. content-transfer-encoding

20) B. Iterative queries

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Answers:

1) C. network layer
2) A. routing
3) A. Static or Non-adaptive
4) D. Dynamic or adaptive
5) B. Flooding
6) C. Distance Vector Routing
7) C. class B
8) D. Hierarchical Routing
9) B. Link state Routing
10) C. Distance Vector Routing
11) D. Hierarchical Routing
12) A. sink
13) C. Checksum
14) D. Time-to-Live(TTL)
15) B. Protocol
16) B. Destination IP Address
17) C. Broadcast
18) D. Hop Limit
19) C. Next Header
20) C. 32

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Solved Objective Questions on Data Link Layer in OSI Model set-1

1) The .......... layer provides a well defined service interface to the network layer, determining how the bits of the physical layer are grouped into frames.

A. Data Link

B. Physical

C. Network

D. Session

2) The service primitives provide a way for the data link layer on the requesting side to learn whether the request was successfully carried out.

A. Request

B. Indication

C. Response

D. Confirm

3) The different types of services provided by data link layer is/are ...

A. Unacknowledged connectionless service

B. Acknowledged connectionless service

C. Acknowledged connection oriented service

D. All of the above.

4) .......... is used by the network layer to ask the data link layer to do something.

A. Request

B. Indication

C. Response

D. Confirm

5) In ............... the source machine sends independent frames to the destination machine without having the destination machine acknowledge them.

A. Unacknowledged connectionless service

B. Acknowledged connectionless service

C. Acknowledged connection oriented service

D. Unacknowledged connection oriented service

6) ........... is the most sophisticated service provided by the data link layer to the network layer. The source and destination machines establish a connection before any data transfer takes place.

A. Unacknowledged connectionless service

B. Acknowledged connectionless service

C. Acknowledged connection oriented service

D. Unacknowledged connection oriented service

7) In .......... , there are still no connections used, but each frame sent is individually acknowledged.

A. Unacknowledged connectionless service

B. Acknowledged connectionless service

C. Acknowledged connection oriented service

D. Unacknowledged connection oriented service

8) ......... is used to indicate to the network layer that an event has happened, for example, establishment or release of a connection.

A. Request

B. Indication

C. Response

D. Confirm

9) .......... is used on the receiving side by the network layer to reply to a previous indication.

A. Request

B. Indication

C. Response

D. Confirm

10) In .......... we are looking only to see if any error has occurred. The answer is a simple yes or no.

A. error searching

B. error detection

C. error correction

D. error transmission

11) In ........... we need to know the exact number of bits that are corrected and more importantly, their location in the message.

A. error searching

B. error detection

C. error correction

D. error transmission

12) ............ is the process in which the receiver tries to guess the message by using redundant bits.

A. Forward error correction

B. Backward error correction

C. Transmission

D. Retransmission

13) ........... is the technique in which the receiver detects the occurrence of an error and asks the sender to resend the message.

A. Forward error correction

B. Backward error correction

C. Transmission

D. Retransmission

14) In block coding, we divide our message into blocks, each of k bits, called ........

A. Dataword

B. Generator

C. Codeword

D. Checker

15) ............ in the data link layer separates a message from one source to a destination, or from other messages to other destinations, by adding a sender address and a destination address.

A. Transforming

B. Framing

C. Separating

D. Messaging

16) In ............., there is no need for defining the boundaries of the frames; the size itself can be used a delimiter.

A. Standard Size Framing

B. Fixed Size Framing

C. Variable Size Framing

D. Constant Size Framing

17) ............ is prevalent in LANs, we need a way to define the end of the frame and the beginning of the next.

A. Standard Size Framing

B. Fixed Size Framing

C. Variable Size Framing

D. Constant Size Framing

18) Which of the following is/are the methods used for carrying out framing.

A. Character count

B. Starting and ending characters, with character stuffing.

C. Starting and ending flags with bit stuffing.

D. All of the above

19) In ............., the sender sends one frame, stops until it receives confirmation from the receiver, and then sends the next frame.

A. stop and wait protocol

B. simplest protocol

C. sliding window protocol

D. High level Data Link Control Protocol(HDLC)

20) In ......... , the sliding window is an abstract concept that defines the range of sequence numbers that is the concern of the sender and receiver.

A. stop and wait protocol

B. simplest protocol

C. sliding window protocol

D. High level Data Link Control Protocol(HDLC)

Answers:

1) A. Data Link
2) D. Confirm
3) D. All of the above
4) A. Request
5) A. Unacknowledged connectionless service
6) C. Acknowledged connection oriented service
7) B. Acknowledged connectionless service
8) B. Indication
9) B. Indication
10) B. error detection
11) C. error correction
12) A. Forward error correction
13) D. Retransmission
14) A. Dataword
15) B. Framing
16) B. Fixed Size Framing
17) C. Variable Size Framing
18) D. All of the above
19) A. stop and wait protocol
20) C. sliding window protocol

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Solved MCQ on Physical Layer in OSI Reference Model set-1

1) Which of the following is/are the applications of twisted pair cables ......

A. In the local loop

B. In the DSL line

C. In the ISDN Network

D. All of the above

2) .......... transmission systems are widely used in the backbone of networks.

A. Unshielded Twisted Pair(UTP)

B. Shielded Twisted Pair(STP)

C. Optical Fiber

D. Wireless

3) ........... has much lower attenuation and can carry signal to longer distances without using amplifiers and repeaters in between.

A. UTP cable

B. STP cable

C. Fiber Optic cable

D. All of the above

4) The major problem(s) suffered for transmission lines on physical layer is/are .........

A. Attenuation distortion

B. Delay distortion

C. Noise

D. All of the above

5) ......... is the lost of energy as the signal propagates outward.

A. Attenuation distortion

B. Delay distortion

C. Noise

D. None of the above

6) .......... is the unwanted energy from sources other than the transmitter.

A. Attenuation distortion

B. Delay distortion

C. Noise

D. Disturbance

7) Which of the following is not the sources of noise?

A. Thermal

B. Magnetic

C. Inter-modulation

D. Cross talk

8) Data rate in data communication depends on which of the following factors.

A. The bandwidth available

B. The level of the signals we use

C. The quality of the channel

D. All of the above

9) ........... is the physical path between the transmitter and receiver.

A. Transmission media

B. Physical media

C. Transmission path

D. Receiving path

10) The key concern in design of data transmission system is Data Rate and .........

A. Data Path

B. Data flow

C. Distance

D. Frequencies

11) A ............ network is none that establishes a dedicated circuit between nodes and terminals before the users may communicate.

A. Message switching

B. Physical switching

C. circuit switching

D. packet switching

12) Which of the following is not the phase involved in circuit switching network?

A. Connection start

B. Connection establishment

C. Data transfer

D. Termination

13) ........... is also known as store and forward switching since the messages are stored at intermediate nodes in route to their destinations.

A. Message switching

B. Physical switching

C. circuit switching

D. packet switching

14) State True or False for the following characteristics of optical fiber cables.

i) The cost of fiber optic cable is more compared to twisted pair and co-axial.

ii) The installation of fiber optic cable is much easier.

A. i-True, ii-True

B. i-False, ii-True

C. i-True, ii-False

D. i-False, ii-False

15) ............ splits traffic data into chunks.

A. Message switching

B. Linear switching

C. circuit switching

D. packet switching

16) ........... is used to optimize the use of the channel capacity available in a network, to minimize the transmission latency and to increase robustness of communication.

A. Message switching

B. Linear switching

C. circuit switching

D. packet switching

17) The term ......... describes the position of the waveform relative to time 0.

A. Frequency

B. Phase

C. Phase Shift

D. Time period

18) If the value of a signal changes over a very short span of time, it's frequency is .......

A. short

B. low

C. high

D. long

19) What is/are the services provided by ISDN?

i. Data applications

ii. Teletext services

iii. Videotext services

iv. Fascimile(FAX)

A. i, ii and iii only

B. ii, iii and iv only

C. i, iii and iv only

D. All i, ii, iii and iv

20) ............. used in telephone network for bi-directional, real time transfer between computers.

A. Message switching

B. Circuit switching

C. Packet switching

D. Circular switching

Answers:

1) D. All of the above
2) C. Optical Fiber
3) C. Fiber Optic cable
4) D. All of the above
5) A. Attenuation distortion
6) C. Noise
7) B. Magnetic
8) D. All of the above
9) A. Transmission media
10) C. Distance
11) C. circuit switching
12) A. Connection start
13) A. Message switching
14) C. i-True, ii-False
15) D. packet switching
16) D. packet switching
17) B. Phase
18) C. high
19) D. All i, ii, iii and iv
20) B. Circuit switching

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