Introduction to Computer Networks

A computer network is a group of computers and peripheral devices linked together to share data and hardware resources.

Resource sharing and reduction in cost are two advantages of networking in organizations.

Resource sharing refers to the ability of all users in a network to access shared hardware and software resources like printers and files.

<p>Networking reduces costs by allowing multiple computers to share hardware resources, such as printers and scanners, instead of requiring individual devices for each computer.</p> Signup and view all the answers

<p>An example of a network in daily life is the communication network of the telephone system.</p> Signup and view all the answers

<p>A computer network transforms the world into a global village by enabling instant communication and data sharing across distances.</p> Signup and view all the answers

<p>The central computer in a network acts as a hub from which additional peripheral devices can be connected and accessed by all other computers.</p> Signup and view all the answers

<p>Common devices that can be shared include printers, scanners, modems, and fax machines.</p> Signup and view all the answers

<p>Users can store their files on remote computers within the network.</p> Signup and view all the answers

<p>Networking enables high-speed transfer of soft copies from one computer to another.</p> Signup and view all the answers

<p>A server can automate regular backups of data for all connected clients.</p> Signup and view all the answers

<p>Networking allows for file updates or deletions to be made at a single point, preventing mismatched copies.</p> Signup and view all the answers

<p>Data redundancy refers to the duplication of data; networking reduces it by using a central server for data storage.</p> Signup and view all the answers

<p>Users are assigned IDs and passwords for authentication to access data and resources.</p> Signup and view all the answers

<p>Managing a large network requires expertise and special training.</p> Signup and view all the answers

<p>If a server breaks down, all connected computers become isolated and unable to access resources.</p> Signup and view all the answers

<p>A network card physically attaches a computer to a network, enabling participation in network communication.</p> Signup and view all the answers

<p>Modern Ethernet cables are twisted pair cables with eight wires arranged in a specific order, using RJ-45 connectors at both ends for connections.</p> Signup and view all the answers

<p>A modem converts digital signals from a computer into analog signals for transmission over telephone lines and vice versa.</p> Signup and view all the answers

<p>A hub broadcasts messages to all connected computers, while a switch sends messages only to the specific destination based on physical addresses.</p> Signup and view all the answers

<p>A router connects different types of networks, such as LAN and WAN, and determines the best route for message transmission.</p> Signup and view all the answers

<p>When a computer sends a request to a hub, the hub transmits that request to all other computers in the network to identify the recipient.</p> Signup and view all the answers

<p>A switch enhances network speed by providing direct connections between the source and destination computers without unnecessary broadcasting.</p> Signup and view all the answers

<p>A modem establishes a connection over existing telephone lines to enable internet access.</p> Signup and view all the answers

<p>Wireless network cards are used to transmit data wirelessly instead of using Ethernet cables.</p> Signup and view all the answers

<p>Access points or routers increase the communication range of radio signals and can connect to wired networks.</p> Signup and view all the answers

<p>A PAN is a network created for individual use, typically covering a range of less than 10 meters.</p> Signup and view all the answers

<p>A LAN connects multiple devices within a small area and generally requires physical wiring, whereas a PAN is designed for individual use and can be wired or wireless.</p> Signup and view all the answers

<p>A MAN is a network that spans an entire city, commonly used for city cable networks or bank branches.</p> Signup and view all the answers

<p>WANs connect computers over long distances, often using public telecommunications media like satellite signals.</p> Signup and view all the answers

<p>Devices such as laptops, mobile phones, PDAs, and smartphones typically connect in a PAN.</p> Signup and view all the answers

<p>A LAN allows for high-speed data transmission and centralized control over the network.</p> Signup and view all the answers

<p>One major advantage is the presence of alternatives for data transfer in case one component fails.</p> Signup and view all the answers

<p>The significant challenge is the high cost associated with setting up and maintaining the network.</p> Signup and view all the answers

<p>The initial step is to double-click on the Network icon on the Desktop.</p> Signup and view all the answers

<p>Network security refers to protecting data and resources from unauthorized access.</p> Signup and view all the answers

<p>Login Security involves assigning a unique login name and password to users.</p> Signup and view all the answers

<p>Limiting access is essential to prevent unauthorized changes or deletions of sensitive information.</p> Signup and view all the answers

<p>Former employees may try to access or manipulate the company's confidential data.</p> Signup and view all the answers

<p>Computer networking is a group of interconnected computers and devices that share data and resources.</p> Signup and view all the answers

<p>Networking is the process of connecting computers and devices to share resources and information. Two advantages include resource sharing and improved communication.</p> Signup and view all the answers

<p>LAN (Local Area Network) is a network confined to a small geographic area, while WAN (Wide Area Network) spans a larger geographic distance, often connecting multiple LANs.</p> Signup and view all the answers

<p>Two advantages of Star topology are enhanced performance due to easy addition of new nodes, and improved fault tolerance since each device is individually connected.</p> Signup and view all the answers

<p>Client-Server architecture is a network model where clients request services and resources from centralized servers that process these requests. This structure allows for efficient resource management and data handling.</p> Signup and view all the answers

<p>A hub is a basic networking device that broadcasts data to all connected devices, while a switch intelligently directs data only to the specific device that needs it.</p> Signup and view all the answers