MCQ in Computer Network and Networking Part 20 | ECE Board Exam

(Last Updated On: January 7, 2023)

This is the Multiple Choice Questions Part 20 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 yourself 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 20 of the Series

⇐ MCQ in Computer Network and Networking Part 19 | ECE Board Exam

Choose the letter of the best answer in each question.

951. The combination of an IP address and a port number is known as ___________.

A. network number

B. socket address

C. subnet mask number

D. MAC address

952. The Internet Control Message Protocol (ICMP)

A. allows gateways to send error a control messages to other gateways or hosts

B. provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another

C. reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem

D. All of the above

953. Your company has a LAN in its downtown office and has now set up a LAN in the manufacturing plant in the suburbs. To enable everyone to share data and resources between the two LANs, what type of device(s) are needed to connect them? Choose the most correct answer.

A. Modem

B. Cable

C. Hub

D. Router

954. Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?

A. FTP

B. SNMP

C. SMTP

D. RPC

955. Which of the following device is used to connect two systems, especially if the systems use different protocols?

A. hub

B. bridge

C. gateway

D. repeater

956. _______ can detect burst error of length less than or equal to degree of the polynomial and detects burst errors that affect odd number of bits.

A. Hamming Code

B. CRC

C. VRC

D. None of the above

957. The PSTN is an example of a ………………… network.

A. packet switched

B. circuit switched

C. message switched

D. None of these

958. A subset of a network that includes all the routers but contains no loops is called:

A. spanning tree

B. spider structure

C. spider tree

D. none of the mentioned

959. An endpoint of an inter-process communication flow across a computer network is called:

A. socket

B. pipe

C. port

D. none of the mentioned

960. In an Ethernet local area network, which one of the following statements is TRUE?

A. A station stops to sense the channel once it starts transmitting a frame.

B. The purpose of the jamming signal is to pad the frames that are smaller than the minimum frame size.

C. A station continues to transmit the packet even after the collision is detected.

D. The exponential back off mechanism reduces the probability of collision on retransmissions

961. A small network making up the Internet and also having a small number of computers within it is called

A. Host

B. Address

C. Subdomain

D. None of the above

962. If a file consisting of 50,000 characters takes 40 seconds to send, then the data rate is __________.

A. 1 kbps

B. 1.25 kbps

C. 2 kbps

D. 10 kbps

963. In CRC there is no error if the remainder at the receiver is _____.

A. equal to the remainder at the sender

B. zero

C. nonzero

D. the quotient at the sender

964. A modulator converts a _____ signal to a(n) _____ signal.

A. FSK; PSK

B. PSK; FSK

C. analog; digital

D. digital; analog

965. ASK, PSK, FSK, and QAM are examples of _____ encoding.

A. digital-to-digital

B. digital-to-analog

C. analog-to-analog

D. analog-to-digital

966. With an IP address of 201.142.23.12, what is your default subnet mask?

A. 0.0.0.0

B. 255.0.0.0

C. 255.255.0.0

D. 255.255.255.0

967. DSL stands for ________.

A. data subscriber lines

B. dual subscriber lines

C. delay subscriber lines

D. digital subscriber lines

968. The 802.5 standard implements a way for preventing collisions on the network. How are collisions prevented when using this standard?

A. CSMA/CD

B. Token passing

C. Collision detection

D. Time sharing

969. One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field?

A. It can be used to prioritize packets

B. It can be used to reduce delays

C. It can be used to optimize throughput

D. It can be used to prevent packet looping

970. Which of the following system calls results in the sending of SYN packets?

A. socket

B. bind

C. listen

D. connect

971. What is the maximum size of data that the application layer can pass on to the TCP layer below?

A. Any size

B. 2^16 bytes-size of TCP header

C. 2^16 bytes

D. 1500 bytes

972. Station A needs to send a message consisting of 9 packets to Station B using a sliding window (window size 3) and go-back-n error control strategy. All packets are ready and immediately available for transmission. If every 5th packet that A transmits gets lost (but no acks from B ever get lost), then what is the number of packets that A will transmit for sending the message to B?

A. 12

B. 14

C. 16

D. 18

973. Which one of the following statements is FALSE?

A. Packet switching leads to better utilization of bandwidth resources than circuit switching.

B. Packet switching results in less variation in delay than circuit switching.

C. Packet switching requires more per packet processing than circuit switching

D. Packet switching can lead to reordering unlike in circuit switching

974. In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is ________.

A. 2 bytes

B. 1 bytes

C. 4 bytes

D. 5 bytes

975. In Ethernet CSMA/CD, the special bit sequence transmitted by media access management to handle collision is called

A. Preamble

B. Post amble

C. Jam

D. None of the above

976. How many digits of the DNIC (Data Network Identification Code) identify the country?

A. First three

B. First four

C. First five

D. First six

977. Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?

A. FTP

B. SNMP

C. SMTP

D. RPC

978. Which of the following device is used to connect two systems, especially if the systems use different protocols?

A. hub

B. bridge

C. gateway

D. repeater

979. _______ can detect burst error of length less than or equal to degree of the polynomial and detects burst errors that affect odd number of bits.

A. Hamming Code

B. CRC

C. VRC

D. None of the above

980. If 5 files are transferred from server A to client B in the same session. The number of TCP connection between A and B is:

A. 5

B. 10

C. 2

D. 6

981. In an Ethernet local area network, which one of the following statements is TRUE?

A. A station stops to sense the channel once it starts transmitting a frame.

B. The purpose of the jamming signal is to pad the frames that are smaller than the minimum frame size.

C. A station continues to transmit the packet even after the collision is detected.

D. The exponential back off mechanism reduces the probability of collision on retransmission

982. Which of the following to keep track of the individual units of data (called packets) that a message is divided into for efficient routing through the Internet.

A. Address Resolution Protocol (ARP)

B. Internet Protocol (IP)

C. Hypertext transfer Protocol (HTTP)

D. Tr

983. If a file consisting of 50,000 characters takes 40 seconds to send, then the data rate is __________.

A. 1 kbps

B. 1.25 kbps

C. 2 kbps

D. 10 kbps

984. Sending a file from your personal computer’s primary memory or disk to another computer is called

A. uploading

B. downloading

C. logging on

D. hangs on

985. Consider different activities related to email.

m1:Send an email from a mail client to mail server

m2:Download an email from mailbox server to a mail client

m3:Checking email in a web browser

Which is the applicable level protocol user in each activity?

A. m1:HTTP, m2:SMTP, m3:POP

B. m1:SMTP, m2:FTP, m3:HTTP

C. m1:SMTP, m2:POP, m3:HTTP

D. m1:POP, m2:SMTP, m3:IMAP

986. In the slow start phase of the TCP congestion control algorithm, the size of the congestion window

A. does not increase

B. increases linearly

C. increases quadratically

D. increases exponentially

987. Match the following:

(P) SMTP (1) Application layer

(Q) BGP (2) Transport layer

(R) TCP (3) Data link layer

(S) PPP (4) Network layer

(5) Physical layer

A. P – 2 Q – 1 R – 3 S – 5

B. P – 1 Q – 4 R – 2 S – 3

C. P – 1 Q – 4 R – 2 S – 5

D. P – 2 Q – 4 R – 1 S – 3

988. In serial data transmission, every byte of data is padded with a ‘0’ in the beginning and one or two ‘1’ s at the end of byte because

A. Receiver is to be synchronized for byte reception

B. Receiver recovers lost ‘0’ and ‘1’s from these padded bits

C. Padded bits are useful in parity computation

D. None of these

989. What will be the efficiency of a Stop and Wait protocol, if the transmission time for a frame is 20ns and the propagation time is 30ns?

A. 20%

B. 25%

C. 40%

D. 66%

990. Which of the situations might not require multiple routing protocols in a network?

A. when a new layer 2-only switch is added to the network

B. when you are migrating from one routing protocol to another

C. when you are using routers from multiple vendors

D. when there are host-based routers from multiple vendors

991. The number of layers in ISO OSI reference model is __________

A. 4

B. 5

C. 6

D. 7

992. can detect burst error of length less than or equal to degree of the polynomial and detects burst errors that affect odd number of bits.

A. Hamming Code

B. CRC

C. VRC

D. None of the above

993. Firewalls are often configured to block

A. udp traffic

B. tcp traffic

C. both of the mentioned

D. none of the mentioned

994. A proxy firewall filters at _________

A. physical layer

B. data link layer

C. network layer

D. application layer

995. 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

996. In this topology there is a central controller or hub

A. star

B. mesh

C. ring

D. bus

997. In 10base2, 10base5, what do 2 and 5 stand for?

A. Speed in Mbps

B. Number of segments

C. Length of segment

D. Size of segment

998. The process of keeping addresses in memory for future use is called

A. Routing

B. Resolving

C. Caching

D. None of the above

999. Which layer links the network support layers and user support layers

A. session layer

B. data link layer

C. transport layer

D. network layer

1000. If a server has no clue about where to find the address for a hostname, then _______

A. server asks to the root server

B. server asks to its adjacent server

C. request is not processed

D. none of the mentioned

MCQ in Computer Fundamentals Series

Complete List of MCQ in Communications Engineering per topic

Complete List of MCQ in Electronics Engineering per topic