Solution :
540520260322100307 Correct Answer : Compiler

Description -

Compiler is NOT a basic component of a computer network.

Why this is the correct answer:

• Compiler: This is a type of software development tool (specifically a program translator) that converts high-level programming code (like C++ or Java) into machine language that a computer's CPU can understand. It has nothing to do with connecting or transmitting data between devices.
• NIC (Network Interface Card): A critical hardware component installed in a computer that allows it to physically or wirelessly connect to a network.
• Router: A networking device that forwards data packets between different computer networks (like connecting your home network to the Internet).
• Switch: A device that links multiple hardware gadgets together on a single local network, intelligently routing data to the exact intended recipient device.

Solution :
327320260322100220 Correct Answer : Reduces collisions by selective forwarding

Description -

The main reason switches improve network performance compared to hubs is that they reduce collisions by selective forwarding.

Explanation

• Reduces collisions by selective forwarding: A network switch is smart. It maintains a MAC address table to learn which device is connected to which physical port. When it receives a data packet, it sends it only to the specific port of the destination device. This creates dedicated communication paths, separating each port into its own "collision domain" and drastically reducing network traffic and collisions.
• Why hubs degrade performance: A hub is a passive, unintelligent device. It does not know where data is supposed to go. When it receives data on one port, it blindly copies and broadcasts it to every single port on the network. This causes massive data traffic, frequent data collisions (where data packets bump into each other and get destroyed), and forces devices to constantly retransmit their data.
• Other choices explained: Switches are generally more expensive than hubs (not lower cost), they avoid broad broadcasting rather than making it faster, and they operate using digital signals processing frames at the Data Link layer (Layer 2) rather than raw analog signals.

Solution :
998920260322100139 Correct Answer : Router

Description -

The device that determines the best path for data transmission is the Router.

Explanation

• Router: This device operates at the Network Layer (Layer 3) of the OSI model. Its primary job is routing, which means inspecting the destination IP address of incoming data and using routing tables/protocols to determine the absolute best and most efficient path across different networks to get the data to its final destination.
• Switch: A switch only finds the best path within a local network (LAN) using MAC addresses. It connects devices together but does not route data across different, distinct networks or determine wide-area internet pathways.
• Hub: A hub is entirely unintelligent. It does not determine paths at all; it simply copies incoming data and broadcasts it to all connected devices.
• Repeater: A repeater is a physical-layer device that simply amplifies or regenerates weak signals so they can travel longer distances over a cable. It has no path-determination capability.

Solution :
981520260322100056 Correct Answer : Fiber-optic cable

Description -

The transmission media that provides the highest speed and least signal loss is the Fiber-optic cable.

Explanation

• Fiber-optic cable: This medium uses light pulses transmitted through ultra-thin strands of glass or plastic instead of electrical signals over metal. Because light travels incredibly fast and is completely immune to electromagnetic interference (EMI) or radio frequency interference (RFI), fiber-optic cables offer the highest bandwidth/speeds and the lowest signal attenuation (loss) over long distances.
• Twisted pair cable: Commonly used for local Ethernet connections (like Cat5e or Cat6). While efficient for short distances inside buildings, its electrical signals suffer from resistance and interference over longer spans, leading to higher signal loss and lower speeds than fiber.
• Coaxial cable: Often used for cable TV and high-speed internet setups. It is thicker and better shielded than standard twisted-pair copper, but it still relies on copper-based electrical signals, making it significantly slower and more prone to degradation over distance compared to light-based fiber.
• Copper wire: A broad category that includes both twisted pair and coaxial cables. All copper-based mediums rely on electrical currents, which naturally experience resistance (attenuation) and signal degradation much sooner than optical signals.

Solution :
242820260322100010 Correct Answer : Intelligent hub

Description -

The type of hub that has the ability to monitor network traffic and diagnose issues is the Intelligent hub.

Explanation

• Intelligent hub: These are advanced hubs that include management software and processing power. They support network management protocols (like SNMP), allowing administrators to monitor traffic passing through the hub, configure individual ports, track performance, and remotely diagnose network issues.
• Passive hub: This is a completely basic hardware device. It does not amplify or clean the electrical signal; it simply splits the signal to pass it along to other devices. It has no monitoring or intelligence capabilities whatsoever.
• Active hub: Unlike a passive hub, an active hub amplifies and cleans up the incoming electrical signal before broadcasting it to strengthen it over longer distances (acting like a multi-port repeater). However, it does not have traffic monitoring or diagnostics capabilities.
• Hybrid hub: This type of hub is used to connect different types of transmission cables together (for example, joining coaxial cables with twisted-pair cables). It deals with physical media compatibility rather than smart network monitoring.

Solution :
638720260322095916 Correct Answer : Converting digital to analog signals

Description -

A modem primarily performs the function of converting digital to analog signals (and vice versa).

Explanation

• Converting digital to analog signals: The word "modem" is a combination of Modulator-Dem Computers communicate internally using digital signals (discrete 1s and 0s), while traditional long-distance transmission lines (like telephone lines or cable systems) carry information as continuous analog waves. A modem modulates digital data into an analog signal for transmission and demodulates the incoming analog signal back into digital data for your computer.
• Routing packets: This is the primary function of a Router, which manages traffic and directs data packets between different networks using IP addresses.
• Amplifying signals: This is the job of a Repeater or an Active Hub, which boosts weak electrical signals so they can travel longer distances without degrading.
• Filtering MAC addresses: This is done by a Switch, which inspects Physical Layer/Data Link Layer (MAC) addresses to direct data to specific local devices.

Solution :
642120260322095829 Correct Answer : Gateway

Description -

The device that acts as a translator between networks using different protocols is the Gateway.

Explanation

• Gateway: A gateway is a specialized network node that connects two entirely different networks that use different communication protocols, data formats, or architectures. It operates at the higher layers of the OSI model (up to the Application Layer) and literally translates the data from one protocol format into another so the two distinct networks can understand each other.
• Router: A router connects different networks as well, but it generally joins networks that use the same underlying protocols (typically TCP/IP). It forwards data packets based on IP addresses but does not completely translate or convert different protocol architectures.
• Switch: A switch operates within a single local network (LAN) and moves data between devices using the same protocol by looking at MAC addresses. It has no capability to translate between conflicting protocols.
• Modem: A modem bridges the gap between digital and analog signals (modulating/demodulating) for internet access, but it does not perform protocol translation between different network architectures.

Solution :
367520260322095727 Correct Answer : It broadcasts data to all devices

Description -

The primary limitation of a hub in a network is that it broadcasts data to all devices.

Explanation

• It broadcasts data to all devices: A hub is an unintelligent physical layer device. When it receives data from one connected device, it cannot read the data's destination address. Instead, it blindly copies and broadcasts that data to every single device connected to its physical ports. This leads to massive amounts of unnecessary network traffic, severe security vulnerabilities (since any device can intercept the data), and a very high risk of data collisions.
• It cannot connect to the internet: While a hub alone cannot route internet traffic (you need a router for that), it can still be part of a network that connects to the internet, so this is not its primary inherent architectural flaw.
• It sends data only to one device: This is false. This describes how a switch works (unicast/selective forwarding). A hub does the exact opposite.
• It works only in full duplex: This is false. Hubs actually work only in half-duplex mode, meaning devices connected to a hub cannot send and receive data at the exact same time without causing collisions.

Solution :
273620260322095627 Correct Answer : Router

Description -

The device that operates at the Network Layer (Layer 3) of the OSI model is the Router.

Explanation

• Router: Routers operate at the Network Layer (Layer 3) because they deal directly with IP addresses (logical addressing) and routing protocols. Their primary function is to forward packets across different networks and determine the optimal path for data to travel from its source to its destination.
• Hub: A hub operates at the Physical Layer (Layer 1). It has no understanding of frames, packets, or addresses; it simply receives raw electrical bits on one port and copies them onto all other ports.
• Switch: A traditional standard switch operates at the Data Link Layer (Layer 2). It reads MAC addresses (physical hardware addresses) contained within data frames to selectively forward traffic within a local area network (LAN). (Note: Advanced Layer 3 switches exist, but in standard networking fundamentals, a switch is a Layer 2 device).
• NIC (Network Interface Card): An NIC acts as an interface at both the Physical Layer (Layer 1) and the Data Link Layer (Layer 2), as it handles the physical connection to the medium and houses the hardcoded MAC address.

Solution :
198320260322095359 Correct Answer : Switch

Description -

The device that forwards data only to the intended destination using MAC addresses is the Switch.

Explanation

• Switch: A network switch operates at the Data Link Layer (Layer 2) of the OSI model. It maintains an internal database called a MAC address table (or CAM table). When a data frame arrives, the switch reads its destination MAC address, checks its table, and forwards that data exclusively to the specific physical port where that recipient device is connected. This microsegmentation keeps your network fast and secure.
• Hub: A hub is an unintelligent physical layer device. It cannot read MAC addresses or make selective decisions; it simply blindly broadcasts incoming data to every single connected device.
• Router: A router operates at the Network Layer (Layer 3) and manages traffic between different networks using IP addresses, not MAC addresses.
• Gateway: A gateway acts as a protocol translator between completely different network architectures at higher layers of the OSI model, rather than forwarding local network traffic based on hardware addresses.

Solution :
869420260322095142 Correct Answer : Security and resource management are centralized

Description -

The correct statement about client-server networks is: Security and resource management are centralized

.

Explanation

• Security and resource management are centralized: In a client-server architecture, a dedicated server acts as a central repository for files, access credentials, and network configurations. This allows administrators to manage user access, enforce security policies, install software updates, and back up critical data all from one single location.
• All nodes share equal responsibility: This is false. This describes a Peer-to-Peer (P2P) network architecture where every computer (peer) acts as both a client and a server, sharing resources without a central authority.
• No dedicated server is required: This is false. A client-server network explicitly requires at least one dedicated server optimized to listen for and fulfill requests made by client machines.
• It is mainly used for very small networks only: This is false. Client-server networks are highly scalable and are the standard architecture used for medium, large, and enterprise-level networks (including the global Internet). Peer-to-peer networks are typically used for very small networks (like a small home or office setup with under 10 computers).

Solution :
377820260322095056 Correct Answer : Hybrid architecture

Description -

The correct architecture that combines both client-server and peer-to-peer models is the Hybrid architecture.

Explanation

• Hybrid architecture: This architecture merges the best features of both models. A classic example is a BitTorrent network or Spotify's original streaming system. It uses a centralized client-server model for tasks like user authentication, searching for files, and managing indexing, but switches to a peer-to-peer (P2P) model for the actual heavy data transfer or file sharing directly between the users (peers).
• Distributed architecture: While it distributes processing across multiple nodes, it refers broadly to any system where components located on networked computers communicate and coordinate their actions. It does not explicitly mean a combination of client-server and P2P structures.
• Centralized architecture: This relies entirely on a single central server or mainframe to process data and manage resources for all connected clients. It is the exact opposite of a peer-to-peer setup.
• Layered architecture: This is a software design pattern (like the OSI 7-layer model or a 3-tier application) where components are organized into horizontal layers with distinct roles, rather than a network model defining client and peer roles.

Solution :
29920260322095016 Correct Answer : Lack of centralized data backup and security issues

Description -

The major disadvantage of peer-to-peer networks is the Lack of centralized data backup and security issues.

Explanation

• Lack of centralized data backup and security issues: Because a Peer-to-Peer (P2P) network does not have a central, dedicated server, every individual computer (peer) is responsible for storing its own files and managing its own security settings. This means that if data needs to be backed up, an administrator must manually back up each machine. Security is also a major risk, as a virus or security breach on just one single machine can easily spread to infect the other peers on the network.
• High cost of setup: This is false. P2P networks are incredibly inexpensive because they don't require expensive server hardware, high-end operating system licenses, or specialized network administrators.
• Requires complex configuration: This is false. P2P networks are famous for being very easy and simple to set up, often requiring little more than connecting devices to a basic switch or router and enabling file sharing.
• Needs a powerful server: This is false. The fundamental definition of a P2P network is that it does not use a dedicated server; every computer shares the workload equally.

Solution :
364220260322094924 Correct Answer : Via the server which manages requests and responses

Description -

In a client-server architecture, communication typically occurs via the server which manages requests and responses.

Explanation

• Via the server which manages requests and responses: In a pure client-server network, clients do not recognize or trust each other directly. If Client A wants to send a message, share a file, or request data from Client B (for example, sending an instant message on WhatsApp or an email), Client A must send a request to the central server. The server processes that request, handles authentication and security checks, and then delivers the response or data to Client B.
• Direct communication without server involvement: This is false. Direct client-to-client communication is the hallmark of a Peer-to-Peer (P2P) network, not a client-server architecture.
• Through a switch only: While a physical hardware switch or router moves the raw data packets through local cables, it handles the low-level data routing. Architecturally, the logical communication and data processing still have to pass through and be authorized by the application server.
• Using peer-to-peer protocol: This is false. Client-server systems rely on structured request-response protocols (like HTTP/HTTPS, SMTP, or IMAP) designed specifically for centralized server management, rather than P2P protocols (like BitTorrent).

Solution :
364320260322094823 Correct Answer : Each node has equal privileges and responsibilities

Description -

The statement that best describes a peer-to-peer network architecture is: Each node has equal privileges and responsibilities.

Explanation

• Each node has equal privileges and responsibilities: In a Peer-to-Peer (P2P) network, there is no hierarchical structure or central master computer. Every connected computer (called a node or peer) acts as both a client and a server at the same time. Each computer can share its own local resources (like files, storage, or printers) and request resources directly from other peers.
• All nodes depend on a central server for communication: This is false. This describes a client-server In a P2P network, nodes communicate directly with one another without any middleman server.
• Data backup is centrally managed: This is false. Because there is no central server, data is scattered across all the individual machines. Backups must be performed independently on each individual computer.
• It requires a dedicated network administrator: This is false. P2P networks are designed to be simple and self-managing. Because they are typically used in small environments (like a home or small office), individual users manage their own systems without needing a professional network admin.

Solution :
769020260322094703 Correct Answer : Fiber Optic Cable

Description -

The transmission medium that uses light signals for high-speed data transfer is the Fiber Optic Cable.

Explanation

• Fiber Optic Cable: This medium is made of ultra-thin strands of glass or plastic. Instead of carrying electrical currents, it transmits data using pulses of light generated by lasers or LEDs. Because light travels incredibly fast and faces almost no electrical resistance, fiber optic cables provide the highest bandwidth and the least signal degradation over massive distances. They are also entirely immune to electromagnetic interference (EMI).
• Twisted Pair Cable: This is a copper-based cable commonly used for telephone and local networking. It relies on electrical signals, which naturally lose strength and suffer from interference over longer distances.
• Coaxial Cable: Frequently used for cable TV and broadband internet. Like twisted pair, it uses a central copper wire to transmit electrical signals. It is heavily shielded but still significantly slower and more limited in distance than fiber optic technology.
• Ethernet Cable: "Ethernet" is a broad networking standard rather than a specific physical material. While most local Ethernet cables (like Cat6) are made of copper twisted pairs, Ethernet protocols can also run over fiber optics.

Solution :
226320260322094607 Correct Answer : IMAP

Description -

The protocol responsible for retrieving emails and allowing access from multiple devices without deleting them from the server is IMAP (Internet Message Access Protocol).

Explanation

• IMAP: IMAP keeps your emails stored directly on the central mail server. When you open an email on your phone, laptop, or tablet, the device syncs with the server to view the message. Changes (like marking an email as read or organizing it into folders) are updated everywhere instantly. This makes it perfect for accessing your email from multiple devices without anything being deleted.
• POP3 (Post Office Protocol 3): This protocol downloads your emails directly to one specific device and, by default, immediately deletes them from the mail server. If you check your email on your computer using POP3, you will no longer be able to see those same emails if you try to open them later on your phone.
• SMTP (Simple Mail Transfer Protocol): SMTP is used exclusively for sending outgoing emails from a client to a server, or between servers. It cannot be used to fetch or retrieve emails.
• FTP (File Transfer Protocol): This is a generic network protocol used for uploading and downloading raw files between a client and a server on a computer network. It has nothing to do with email processing.

Solution :
439220260322094520 Correct Answer : VPN

Description -

The correct answer is VPN (Virtual Private Network).

Explanation

• VPN (Virtual Private Network): A VPN is a technology that creates a secure, encrypted connection (often called a tunnel) over a public and unsecure network, typically the Internet. It is defined entirely by its cryptography and access controls rather than its physical location. For example, an employee working from a cafe in India can securely access their company’s private network in New York as if they were physically sitting in the office.
• LAN (Local Area Network): A LAN is explicitly defined by geographical boundaries. It covers a small, limited physical area, such as a single room, a home, or an office building.
• WAN (Wide Area Network): A WAN is also defined by geographical boundaries, covering huge distances such as an entire country, continent, or even the whole globe (like the Internet).
• MAN (Metropolitan Area Network): A MAN covers a geographic area larger than a LAN but smaller than a WAN, typically spanning a single town or city (such as a city-wide cable television network).

Solution :
263220260322094420 Correct Answer : IP

Description -

The protocol/component responsible for assigning addresses and determining the best path for data transmission is IP (Internet Protocol).

Explanation

• IP (Internet Protocol): This is the core protocol of the Network Layer (Layer 3). It is strictly responsible for logical addressing (giving every device on a network a unique IP address) and packet routing. It determines how data packets are structured and decides the best structural path for data to travel across interconnected networks to reach its destination.
• TCP (Transmission Control Protocol): TCP operates at the Transport Layer (Layer 4). It does not handle addressing or path determination. Instead, it focuses on establishing a reliable connection, managing data packet sequencing, and ensuring error-free delivery.
• HTTP (Hypertext Transfer Protocol): This is an Application Layer (Layer 7) protocol used specifically for transferring web pages and web data across the internet. It relies entirely on IP to handle the underlying addressing and routing.
• FTP (File Transfer Protocol): This is also an Application Layer protocol designed purely for uploading and downloading raw files between a client and a server.

Solution :
925320260322094343 Correct Answer : Switch sends data directly to the destination device

Description -

The statement that best differentiates them is: Switch sends data directly to the destination device.

Explanation

• Switch sends data directly to the destination device: A switch is an intelligent device that operates at the Data Link Layer (Layer 2). It reads the unique hardware (MAC) address of any incoming data frame and forwards it only out of the specific physical port where the destination device is connected.
• Switch broadcasts data to all devices, while Hub sends to one device: This is completely reversed. A hub is the device that blindly broadcasts data to everyone, while a switch isolates traffic to the single intended destination.
• Hub sends data only to the intended device: This is false. Hubs are unintelligent physical layer (Layer 1) components that have no concept of addressing; they repeat incoming data signals across all active ports simultaneously.
• Both behave identically: This is false. They have fundamentally different architectural designs, performance outputs, and data handling methods.