This section contains carefully selected MCQs and Previous Year Questions with explanations to help students understand concepts and prepare effectively for examinations, interviews, and competitive tests.
Q: 1Which of the following is not a type of Network Topology?
Option A
Network Topology refers to the physical or logical arrangement of computers and communication devices in a network. It defines how different devices are connected and how data travels in the network.
| Network Topology | Description |
|---|---|
| Bus Topology | In bus topology, all computers are connected to a single main communication cable called backbone cable. |
| Star Topology | In star topology, all computers are connected to a central hub or switch. |
| Ring Topology | In ring topology, each computer is connected to two neighboring computers forming a circular path. |
| Mesh Topology | In mesh topology, every computer is directly connected to every other computer in the network. |
| Tree Topology | In tree topology, multiple star networks are connected in a hierarchical structure. |
| Hybrid Topology | In hybrid topology, two or more different topologies are combined together. |
| Point-to-Point Topology | In point-to-point topology, two devices are directly connected with each other. |
| Daisy Chain Topology | In daisy chain topology, devices are connected one after another in a sequence. |
Q: 2Which of the following methods provides dedicated communication channel between two stations?
Option C
In Circuit Switching, a dedicated communication path is established between two stations before data transfer begins. This path remains reserved for the entire duration of the communication, ensuring a continuous and reliable connection. A common example is the traditional telephone network.
Q: 3Let us assume that there are four (4) network segments in Bus topologies A1—A2, B1—B2—B3, C1—C2 and D1—D2—D3. If A1, B1, C1 and D1 are interconnected in mesh, then how many mesh connections are required?
Option B
Given 4 network segments represented by points A1, B1, C1, and D1 interconnected in a mesh, we need to find the total number of mesh connections.
With 4 nodes the number of connections is [4(4-1)/2] = [4*3/2] = 12/2 = 6.
Q: 4Which of the following statements about twists in twisted pair cables is TRUE?
Option C
Twisted pair cables are a type of electrical cable commonly used in networking and telecommunications.
Twisted pair cables consist of two insulated copper conductors twisted together to reduce electromagnetic interference (EMI) and crosstalk between adjacent pairs and improves overall signal quality.
Q: 5Choose WRONG statement about packet switching
Option B
Packet Switching is a data transmission method where data is broken into small units called Packets, and each packet can travel independently across the network.
Q: 6What is an infrastructure network as per IEEE 802.11 standard?
Option B
In wireless networking, IEEE 802.11 is the standard that defines Wi-Fi networks. Under this standard, a Basic Service Set (BSS) is the fundamental building block of a wireless LAN. There are two primary types of network configurations:
Infrastructure Mode : This setup includes a central Access Point (AP) that coordinates communication between wireless devices (stations). Multiple BSS can be interconnected via access points.
Ad hoc Mode (Independent Basic Service Set (IBSS)) :This setup does not have an access point. Wireless devices communicate directly with each other, forming a temporary or decentralized network.
| Network Type | Access Point Present | Communication Type | Example |
|---|---|---|---|
| Infrastructure Network | Yes | Through Access Point. | Home Wi-Fi, Office Wi-Fi. |
| Ad hoc (IBSS) | No | Direct (Peer-to-Peer) | Temporary device-to-device sharing. |
Q: 7Token ring is standardized in 1989 as IEEE __________.
Option C
Token Ring is a LAN technology in which a token (special frame) is passed around a ring network, and only the device holding the token can transmit data. It was standardized by IEEE as 802.5 in 1989.
| IEEE Standard | Technology |
|---|---|
| 802.3 | Ethernet. |
| 802.4 | Token Bus. |
| 802.5 | Token Ring. |
| 802.11 | Wireless LAN (Wi-Fi). |
Q: 8Which of the following statement(s) is/are true regarding switching techniques in Data communication?
I. In circuit switching a dedicated path is identified between the sender and the receiver.
II. In packet switching each information to be transmitted between sender and receiver is broken down into smaller packets.
Option C
In data communication, switching techniques are used to transfer data from sender to receiver through a network. These techniques help determine how data travels between devices.
In Circuit Switching, a dedicated communication path is established between the sender and receiver before data transmission begins. This path remains reserved during the entire communication session.
E.g.:
In Packet Switching, the data or message is divided into smaller units called packets. Each packet travels independently through the network and may follow different routes before reaching the destination.
At the destination, all packets are reassembled to form the original message.
E.g.:
Q: 9In which topology, if there are n devices in a network each device has n-1 ports for connecting through cables
Option A
In computer networks, Topology defines how devices are connected to each other. Different topologies require different numbers of connections like ports and cables.
In a mesh topology, every device is directly connected to every other device. So, if there are n devices, each device must connect with (n-1) other devices. Therefore, each device needs (n-1) ports.
Q: 10Which standard is used to define protocol, host computer, port and path on the Internet?
Option B
When we access a webpage or any resource on the Internet, we use an address that tells the computer where to find it. This address is called a URL (Uniform Resource Locator). It includes several parts such as the protocol, host computer, port, and path.
URL example, https://www.surakuacademy.com/rpsc-vice-principal-iti-information-technology-paper-solution
| PART | DESCRIPTION | EXAMPLE |
|---|---|---|
| Protocol | Communication method such as HTTP, HTTPS, FTP. | https |
| Host | Domain name or IP address of the server. | www.surakuacademy.com |
| Port | Connection port, optional, tells which service or connection point to use. Common default ports are 80 for HTTP and 443 for HTTPS. | 443 |
| Path | The specific file or page inside the website. Specifies the exact location or file on the host server. | /rpsc-vice-principal-iti-information-technology-paper-solution |
Q: 11There are n stations in a slotted LAN. Each station attempts to transmit with a probability p in each time slot. What is the probability that only one station transmits in a given time slot?
Option C
In a slotted LAN, all n stations get a chance to send data in every time slot. Each station tries to send with a probability p. To find the probability that only one station sends data, we think about two things:
Because any one of the n stations could be the one that transmits successfully, we multiply by n. So, the probability that only one station transmits is n×p×(1−p)n−1.
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