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BPSC TRE · Computer Science

Computer Networks Previous Year Questions

33 Computer Networks (Computer Science) questions asked in BPSC TRE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.

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Other Computer Science topics

DBMS & SQL 48Data Structures 44Digital Logic & Number Systems 30Computer Organization & Architecture 27OOP 18Programming in C/C++ 16Operating Systems 14Algorithms 9
Q1BPSC TRE 2.0 (2023) Computer Class 9-10
Which of the following is not a type of database?
  1. ANetwork
  2. BDistributed
  3. CDecentralized
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) Decentralized

Explanation

Network and distributed are standard database types; 'decentralized' is not a classical database type.

Q2BPSC TRE 2.0 (2023) Computer Class 9-10
The traditional storage of data organized by the customer, stored in separate folders in filing cabinets is an example of
  1. Arelational database management system
  2. Bnetwork database management system
  3. Chierarchical database management system
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) hierarchical database management system

Explanation

Folders inside filing cabinets form a tree of parent and child containers, which is the hierarchical model.

Q3BPSC TRE 2.0 (2023) Computer Class 9-10
Communication between a computer and a keyboard involves _____ transmission.
  1. Asimplex
  2. Bhalf-duplex
  3. Cfull-duplex
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) simplex

Explanation

Data flows only from the keyboard to the computer, which is simplex transmission.

Q4BPSC TRE 2.0 (2023) Computer Class 9-10
Wireless transmission of signals can be done via
  1. Aradio waves
  2. Bmicrowaves
  3. Cinfrared
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (D) More than one of the above

Explanation

Radio waves, microwaves and infrared are all wireless media, so more than one option is correct.

Q5BPSC TRE 2.0 (2023) Computer Class 9-10
Sniffers can be prevented by using
  1. Awired environment
  2. Bethernet LAN
  3. Cswitched network
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) switched network

Explanation

A switched network sends frames only to the intended port, which makes packet sniffing much harder than on a shared medium.

Q6BPSC TRE 2.0 (2023) Computer Class 9-10
Transmission control protocol
  1. Ais a connection-oriented protocol
  2. Buses a three-way handshake to establish a connection
  3. Creceives data from application as a single stream
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (D) More than one of the above

Explanation

TCP is connection-oriented, sets up a connection with a three-way handshake and takes data from the application as one stream, so A, B and C all hold.

Q7BPSC TRE 2.0 (2023) Computer Class 9-10
An endpoint of an inter-process communication flow across a computer network is called
  1. Asocket
  2. Bpipe
  3. Cport
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) socket

Explanation

The endpoint of a communication flow between processes over a network is a socket.

Q8BPSC TRE 2.0 (2023) Computer Class 9-10
Which transmission media provides the highest transmission speed in a network?
  1. ACoaxial cable
  2. BTwisted-pair cable
  3. COptical fiber
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) Optical fiber

Explanation

Optical fibre carries data as light and offers the highest speed and bandwidth of these media.

Q9BPSC TRE 3.0 (2024) Computer Science Class 11-12
Which of the following is a type of operating system?
  1. AReal-time operating system
  2. BEmbedded operating system
  3. CNetwork operating system
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (D) More than one of the above

Explanation

Real-time, embedded and network operating systems are all types of OS, so more than one option is correct.

Q10BPSC TRE 3.0 (2024) Computer Science Class 11-12
What is the primary function of a router in a computer network?
  1. ATo connect devices within the same network
  2. BTo connect multiple networks together
  3. CTo filter incoming traffic based on IP addresses
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) To connect multiple networks together

Explanation

A router connects separate networks and forwards packets between them using IP addresses. Devices within one LAN are connected by a switch.

Q11BPSC TRE 3.0 (2024) Computer Science Class 11-12
In the OSI model, which layer is responsible for routing and forwarding data packets?
  1. AData Link Layer
  2. BTransport Layer
  3. CPhysical Layer
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (E) None of the above

Explanation

Routing and forwarding packets is the job of the Network Layer (Layer 3), which is not among the options.

Q12BPSC TRE 3.0 (2024) Computer Science Class 11-12
Which device is used to connect multiple devices within the same local area network (LAN)?
  1. ARouter
  2. BSwitch
  3. CBridge
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) Switch

Explanation

A switch connects many devices within the same LAN and forwards frames to the correct port using MAC addresses. A router links different networks.

Q13BPSC TRE 3.0 (2024) Computer Science Class 11-12
Which protocol is used to send email over the Internet?
  1. AFTP
  2. BSMTP
  3. CHTTP
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) SMTP

Explanation

SMTP (Simple Mail Transfer Protocol) sends email between servers. FTP transfers files and HTTP serves web pages.

Q14BPSC TRE 3.0 (2024) Computer Science Class 11-12
What is the purpose of a subnet mask in TCP/IP networking?
  1. ATo identify the network portion of an IP address
  2. BTo identify the host portion of an IP address
  3. CTo convert IP addresses into domain names
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (D) More than one of the above

Explanation

The subnet mask separates an IP address into its network and host portions: the 1 bits mark the network part and the 0 bits mark the host part. So A and B are both correct.

Q15BPSC TRE 3.0 (2024) Computer Science Class 11-12
What is the maximum data rate of Bluetooth version 5.0?
  1. A1 Mbps
  2. B2 Mbps
  3. C5 Mbps
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) 2 Mbps

Explanation

Bluetooth 5.0 (Low Energy) supports a maximum data rate of 2 Mbps, twice the 1 Mbps of Bluetooth 4.x LE.

Q16BPSC TRE 3.0 (2024) Computer Science Class 11-12
Which wireless communication technology is commonly used in IoT devices for short-range communication?
  1. ABluetooth
  2. BWi-Fi
  3. C4G LTE
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) Bluetooth

Explanation

Bluetooth (including BLE) is a low-power, short-range wireless technology widely used in IoT devices. Wi-Fi and 4G cover longer ranges and use more power.

Q17BPSC TRE 3.0 (2024) Computer Science Class 11-12
Which of the following is an example of an IoT protocol used for device communication?
  1. AHTTP
  2. BFTP
  3. CMQTT
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) MQTT

Explanation

MQTT is a lightweight publish-subscribe messaging protocol designed for IoT device communication.

Q18BPSC TRE 1.0 (2023) Computer Science Class 11-12
What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interference?
  1. AUnshielded twisted pair
  2. BOptical fiber
  3. CCoaxial cable
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) Optical fiber

Explanation

Optical fiber carries data as light, so it is immune to electromagnetic interference. Twisted pair and coaxial cable carry electrical signals that interference can affect.

Q19BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which network topology requires a central controller or hub?
  1. AStar
  2. BMesh
  3. CRing
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) Star

Explanation

In a star topology every device is connected to a central hub or switch, which controls the communication.

Q20BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which of the following is not a step in the Header translation procedure?
  1. AThe IPv6 mapped address is changed to an IPv4 address by extracting the rightmost 32 bits
  2. BThe value of the IPv6 priority field is discarded
  3. CThe IPv6 flow label is considered
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) The IPv6 flow label is considered

Explanation

When an IPv6 header is translated to IPv4, the flow label is ignored. Using it is not part of the procedure, whereas extracting the rightmost 32 bits and dropping the priority are.

Q21BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which sublayer of the data link layer performs data link functions that depend upon the type of medium?
  1. ALogical link control sublayer
  2. BMedia access control sublayer
  3. CNetwork interface control sublayer
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) Media access control sublayer

Explanation

The MAC sublayer handles functions that depend on the medium, such as framing and access control for Ethernet or Wi-Fi. LLC is independent of the medium.

Q22BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which one of the following is not a network topology?
  1. APeer-to-peer
  2. BRing
  3. CBus
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) Peer-to-peer

Explanation

Peer-to-peer is a network architecture (model), not a topology. Ring and bus are physical topologies.

Q23BPSC TRE 1.0 (2023) Computer Science Class 11-12
When the mail server sends mail to other mail servers it becomes
  1. ASMTP client
  2. BSMTP server
  3. Cpeer
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) SMTP client

Explanation

When a mail server sends mail to another mail server, it acts as an SMTP client and the receiving server acts as the SMTP server.

Q24BPSC TRE 1.0 (2023) Computer Science Class 11-12
The length of an IPv6 address is
  1. A32 bits
  2. B64 bits
  3. C256 bits
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (E) None of the above

Explanation

An IPv6 address is 128 bits long. None of the listed sizes (32, 64, 256) is right; 32 bits is IPv4.

Q25BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which layer of the TCP/IP stack corresponds to the OSI model transport layer?
  1. AHost-to-host
  2. BApplication
  3. CInternet
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) Host-to-host

Explanation

The TCP/IP host-to-host (transport) layer matches the OSI transport layer and provides TCP and UDP.

Q26BPSC TRE 1.0 (2023) Computer Science Class 11-12
Which of the following is true with regard to the ping command?
  1. APing stands for Packet Internet Generator.
  2. BThe ping command checks the port level connectivity between source destinations endpoints.
  3. CPing summarizes the packet loss and round-trip delay between two IP endpoints.
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) Ping summarizes the packet loss and round-trip delay between two IP endpoints.

Explanation

Ping (Packet InterNet Groper) uses ICMP echo messages to report packet loss and round-trip time. It does not check ports.

Q27BPSC TRE 2.0 (2023) Computer Science Class 11-12
The topology with highest reliability is
  1. Astar
  2. Bring
  3. Cmesh
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) mesh

Explanation

In a mesh topology, every node has a dedicated link to every other node. If one link fails, other paths still exist, so mesh is the most reliable.

Q28BPSC TRE 2.0 (2023) Computer Science Class 11-12
End-to-end connectivity is provided from host-to-host in
  1. Anetwork layer
  2. Btransport layer
  3. Csession layer
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) transport layer

Explanation

The transport layer (for example TCP) provides end-to-end, process-to-process delivery between the source and destination hosts. The network layer only routes packets hop by hop.

Q29BPSC TRE 2.0 (2023) Computer Science Class 11-12
A high-speed communication equipment typically would not be needed for
  1. Ae-mail
  2. Btransferring large volume of data
  3. Csupporting communication between nodes in a LAN
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) e-mail

Explanation

E-mail sends small amounts of data and does not need to arrive instantly, so it does not need high-speed equipment. Bulk data transfer and LAN links do.

Q30BPSC TRE 2.0 (2023) Computer Science Class 11-12
A _____ topology uses a single connection to connect all devices together.
  1. Abus
  2. Bstar
  3. Cring
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) bus

Explanation

A bus topology connects all devices to one shared cable called the backbone.

Q31BPSC TRE 2.0 (2023) Computer Science Class 11-12
A _____ is used to connect networking devices that are in a very close geographic area such as a floor of a building.
  1. AWAN
  2. BLAN
  3. CMAN
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (B) LAN

Explanation

A LAN (local area network) covers a small area such as a room, a floor or a building. MAN covers a city and WAN covers large distances.

Q32BPSC TRE 2.0 (2023) Computer Science Class 11-12
In computer network, what is the size of IP address in IPv4?
  1. A8 bits
  2. B16 bits
  3. C32 bits
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) 32 bits

Explanation

An IPv4 address is 32 bits long, written as four 8-bit octets (for example 192.168.1.1). An IPv6 address is 128 bits.

Q33BPSC TRE 2.0 (2023) Computer Science Class 11-12
What is the size of MAC address in computer network?
  1. A32 bits
  2. B16 bits
  3. C48 bits
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (C) 48 bits

Explanation

A MAC address is a 48-bit (6-byte) hardware address, usually written as 12 hex digits, for example 00:1A:2B:3C:4D:5E.

How to use these BPSC TRE Computer Science questions

Every question here was asked in a real BPSC TRE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full BPSC TRE papers as timed tests to check your speed under exam conditions.

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