MCQ in Computer Network and Networking Part 18 | ECE Board Exam

This is the Multiple Choice Questions Part 18 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 18 of the Series

⇐ MCQ in Computer Network and Networking Part 17 | ECE Board Exam

Choose the letter of the best answer in each question.

851. The performance of a data communication network depends on

A. The number of users

B. The transmission media

C. The hardware and software

D. All of the above

852. 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. Transmission Control Protocol/Internet Protocol (TCP/IP)

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

A. Routing

B. Resolving

C. Caching

D. None of the above

854. 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

855. 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

856. 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

857. Internet-like networks within an enterprise.

A. Intranets

B. Switching alternating

C. Inter organizational networks

D. Extranets

858. 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

859. FDDI is a

A. ring network

B. star network

C. mesh network

D. bus-based network

860. Which address is the loopback address?

A. 0.0.0.1

B. 127.0.0.0

C. 127.0.0.1

D. 255.255.255.255

861. A modulator converts a signal to a(n) signal.

A. FSK; PSK

B. PSK; FSK

C. analog; digital

D. digital; analog

862. The birthplace of the World Wide Web is considered to be

A. the Department of Defense

B. CERN

C. ARPA

D. Netscape

863. What is the port number for HTTP?

A. 99

B. 86

C. 80

D. 23

864. The communication mode that supports data in both directions at the same time is

A. simplex

B. half-duplex

C. full-duplex

D. multiplex

865. The basic Ethernet design does not provide

A. access control

B. addressing

C. automatic retransmission of a message

D. multiple virtual networks

866. What does the acronym ISDN stand for?

A. Indian Standard Digital Network

B. Integrated Services Digital Network

C. Intelligent Services Digital Network

D. Integrated Services Data Network

867. 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

868. Who invented the modem?

A. Wang Laboratories Ltd.

B. AT & T Information Systems, USA

C. Apple Computers Inc.

D. Digital Equipment Corp

869. 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

870. Which utility is an all-purpose tool for troubleshooting TCP/IP problems?

A. NBTSTAT

B. Netstat

C. PING

D. Hostname

871. Which Layer is Responsible for Congestion Control?

A. Network Layer

B. Data link Layer

C. Transport Layer

D. Application layer

872. Pure ALOHA has a maximum throughput of ———–

A. 16.4 %

B. 18.4 %

C. 7.4 %

D. 1 %

873. Which of these is a feature of hubs?

A. Hubs amplifies the incoming signal.

B. Hubs understand frames, packets or headers

C. All lines coming into a Hub must operate at a same speed.

D. all of these

874. DSL stands for

A. data subscriber lines

B. dual subscriber lines

C. delay subscriber lines

D. digital subscriber lines

875. Which of the following is a MAC address?

A. 192.166.200.50

B. 00056A:01A01A5CCA7FF60

C. 568, Airport Road

D. 01:A5: BB: A7: FF: 60

876. The main difference between TCP and UDP is

A. UDP is connection oriented whereas TCP is datagram service

B. TCP is an Internet protocol whereas UDP is an ATM protocol

C. UDP is a datagram whereas TCP is a connection-oriented service

D. All of the above

877. What operates in the Data Link and the Network layer?

A. NIC

B. Bridge

C. Brouter

D. Router

878. Which file transfer protocol uses UDP?

A. NFS

B. TELNET

C. TFTP

D. FTP

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

A. X.3

B. X.21

C. X.25

D. X.75

880. In OSI model, which of the following layer provides error-free delivery of data?

A. Data link

B. Network

C. transport

D. Session

881. 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

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

A. 1 – 126

B. 192 – 255

C. 192 – 223

D. 1 – 127

883. 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

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

A. 128 – 255

B. 1 – 127

C. 192 – 223

D. 128 – 191

885. ARP (Address Resolution Protocol) is

A. a TCP/IP protocol used to dynamically bind a high-level IP Address to a low-level physical hardware address

B. a TCP/IP high level protocol for transferring files from one machine to another

C. a protocol used to monitor computers

D. a protocol that handles error and control messages

886. 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

887. Terminals are required for

A. real time, batch processing, and timesharing

B. real time, timesharing, and distributed processing

C. real time, distributed processing, and manager inquiry

D. real time, timesharing, and message switching

888. What OSI layer handles logical address to logical name resolution?

A. Transport

B. Physical

C. Presentation

D. Data Link

889. 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

890. 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

891. Which of the following system calls results in the sending of Syn packets?

A. socket

B. bind

C. listen

D. connect

892. 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

893. 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

894. A computer on a 10 Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2 Mbps. It is initially filled to capacity with 16 Megabits. What is the maximum duration for which the computer can transmit at the full 10Mbps?

A. 1.6 seconds

B. 2 seconds

C. 5 seconds

D. 8 seconds

895. In Ethernet when Manchester encoding is used, the bit rate is:

A. Half the baud rate.

B. Twice the baud rate.

C. Same as the baud rate.

D. none of the above

896. 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

897. Determine the maximum length of the cable (in km) for transmitting data at a rate of 500 Mbps in an Ethernet LAN with frames of size 10,000 bits. Assume the signal speed in the cable to be 2,00,000 km/s.

A. 1

B. 2

C. 2.5

D. 5

898. Let G(x) be the generator polynomial used for CRC checking. What is the condition that should be satisfied by G(x) to detect odd number of bits in error?

A. G(x) contains more than two terms

B. G(x) does not divide 1+x^k, for any k not exceeding the frame length

C. 1+x is a factor of G(x)

D. G(x) has an odd number of terms.

899. 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

900. 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

MCQ in Computer Fundamentals Series

Complete List of MCQ in Communications Engineering per topic

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