MCQ in Computer Network and Networking Part 10 | ECE Board Exam

(Last Updated On: January 7, 2023)

This is the Multiple Choice Questions Part 10 of the Series on Computer Network and Networking as one of the Communication Engineering (EST) and Electronics Engineering topics. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize with each and every question compiled here taken from various sources including but not limited to past Board Exam Questions in Communication Engineering and Electronics Engineering field, Communications Books, Electronics Books, Journals and other Communications and Electronics References.

Continue Practice Exam Test Questions Part 10 of the Series

⇐ MCQ in Computer Network and Networking Part 9 | ECE Board Exam

Choose the letter of the best answer in each question.

451. Which one of the following is not true?

A. telnet defines a network virtual terminal (nvt) standard

B. client programs interact with nvt

C. server translates nvt operations

D. client can transfer files using to remote server using nvt

452. All telnet operations are sent as ________

A. 4 bits

B. 8 bits

C. 16 bits

D. 32 bits

453. Absolute Telnet is a telnet client for _______ Operating system.

A. windows

B. linux

C. mac

D. ubuntu

454. The decimal code of Interpret as Command (IAC) character is _______

A. 252

B. 253

C. 254

D. 255

455. Which of the following is false with respect to TCP?

A. connection-oriented

B. process-to-process

C. transport layer protocol

D. unreliable

456. In TCP, sending and receiving data is done as _______

A. stream of bytes

B. sequence of characters

C. lines of data

D. packets

457. TCP groups a number of bytes together into a packet called _______

A. packet

B. buffer

C. segment

D. stack

458. Communication offered by TCP is ________

A. full-duplex

B. half-duplex

C. semi-duplex

D. byte by byte

459. The value of acknowledgement field in a segment defines _______

A. sequence number of the byte received previously

B. total number of bytes to receive

C. sequence number of the next byte to be received

D. sequence of zeros and ones

460. Size of TCP segment header ranges between ___________

A. 16 and 32 bytes

B. 16 and 32 bits

C. 20 and 60 bytes

D. 20 and 60 bits

461. Connection establishment in TCP is done by which mechanism?

A. flow control

B. three-way handshaking

C. forwarding

D. synchronization

462. SYNC flooding attack belongs to a type of security attack known as ___________

A. sync flooding attack

B. active attack

C. passive attack

D. denial-of-service attack

463. What allows TCP to detect lost segments and in turn recover from that loss?

A. sequence number

B. acknowledgment number

C. checksum

D. both sequence & acknowledgment number

464. Which of the following is false with respect to UDP?

A. connection-oriented

B. unreliable

C. transport layer protocol

D. low overhead

465. Return value of the UDP port “Chargen” is _______

A. string of characters

B. string of integers

C. array of characters with integers

D. array of zero’s and one’s

466. Beyond IP, UDP provides additional services such as _______

A. routing and switching

B. sending and receiving of packets

C. multiplexing and demultiplexing

D. demultiplexing and error checking

467. What is the main advantage of UDP?

A. more overload

B. reliable

C. low overhead

D. fast

468. Port number used by Network Time Protocol (NTP) with UDP is ________

A. 161

B. 123

C. 162

D. 124

469. What is the header size of a UDP packet?

A. 8 bytes

B. 8 bits

C. 16 bytes

D. 124 bytes

470. The port number is “ephemeral port number”, if the source host is _______

A. ntp

B. echo

C. server

D. client

471. “Total length” field in UDP packet header is the length of _________

A. only udp header

B. only data

C. only checksum

D. udp header plus data

472. Which is the correct expression for the length of UDP datagram?

A. udp length = ip length – ip header’s length

B. udp length = udp length – udp header’s length

C. udp length = ip length + ip header’s length

D. udp length = udp length + udp header’s length

473. The ______ field is used to detect errors over the entire user datagram.

A. udp header

B. checksum

C. source port

D. destination port

474. IPsec defines two protocols: _______ and ________

A. ah; ssl

B. pgp; esp

C. ah; esp

D. pgp; ssl

475. IP Security operates in which layer of the OSI model?

A. network

B. transport

C. application

D. physical

476. ESP does not provide ________

A. source authentication

B. data integrity

C. privacy

D. error control

477. Two broad categories of congestion control are

A. open-loop and closed-loop

B. open-control and closed-control

C. active control and passive control

D. active loop and passive loop

478. In open-loop control, policies are applied to __________

A. remove after congestion occurs

B. remove after sometime

C. prevent before congestion occurs

D. prevent before sending packets

479. Retransmission of packets must not be done when _______

A. packet is lost

B. packet is corrupted

C. packet is needed

D. packet is error-free

480. Discarding policy is mainly done by _______

A. sender

B. receiver

C. router

D. switch

481. Closed-Loop control mechanisms try to _________

A. remove after congestion occurs

B. remove after sometime

C. prevent before congestion occurs

D. prevent before sending packets

482. Backpressure technique can be applied only to _______

A. congestion networks

B. closed circuit networks

C. open circuit networks

D. virtual circuit networks

483. The packet sent by a node to the source to inform it of congestion is called _______

A. explicit

B. discard

C. choke

D. backpressure

484. Which of the following is not a characteristic of Virtual Circuit Network?

A. there are setup and teardown phases in addition to the data transfer phase

B. resources can be allocated during setup phase or on demand

C. all packets follow the same path established during the connection

D. virtual circuit network is implemented in application layer

485. Which of the following is not a phase of virtual circuit network?

A. setup phase

B. data transfer phase

C. termination phase

D. teardown phase

486. Steps required in setup process are ___________

A. setup request and acknowledgement

B. setup request and setup response

C. setup request and setup termination

D. setup and termination steps

487. Delay of the resource allocated during setup phase during data transfer is ________

A. constant

B. increases for each packet

C. same for each packet

D. different for each packet

488. Delay of the resource allocated on demand during data transfer is ________

A. constant

B. increases for each packet

C. same for each packet

D. different for each packet

489. In data transfer phase, how many columns does the table contain?

A. 1

B. 2

C. 3

D. 4

490. ATM and frame relay are ________

A. virtual circuit networks

B. datagram networks

C. virtual private networks

D. virtual public networks

491. ATM uses _______________

A. asynchronous frequency division multiplexing

B. asynchronous time division multiplexing

C. asynchronous space division multiplexing

D. asynchronous amplitude division multiplexing

492. ATM standard defines _______ layers.

A. 2

B. 3

C. 4

D. 5

493. ATM can be used for ________

A. local area network

B. wide area network

C. campus area network

D. networks covering any range

494. An ATM cell has the payload field of __________

A. 32 bytes

B. 48 bytes

C. 64 bytes

D. 128 bytes

495. Frame relay has error detection at the ______

A. physical layer

B. data link layer

C. network layer

D. transport layer

496. Virtual circuit identifier in frame relay is called ______

A. data link connection identifier

B. frame relay identifier

C. cell relay identifier

D. circuit connection identifier

497. Frame relay has _______

A. only physical layer

B. only data link layer

C. only network layer

D. both physical and data link layer

498. In frame relay networks, extended address is used _______

A. to increase the range of data link connection identifiers

B. for error detection

C. for encryption

D. for error recovery

499. What is FRAD in frame relay network?

A. frad assembles and disassembles the frames coming from other protocols

B. frad is used for modulation and demodulation

C. frad is used for error detection

D. frad is used for error recovery

500. Frame Relay is cheaper than other _____

A. lans

B. wans

C. mans

D. multipoint networks

MCQ in Computer Fundamentals Series

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