What is LAN?
A LAN, or Local Area Network, is a network that is confined to a single building or site. It is used by organizations such as businesses, schools, or universities and can be either wired or wireless.
Benefits of LAN
The benefits of LAN include easier file sharing, sharing of hardware such as printers, easy installation and updating of software, shared internet connection among all devices, easy communication between LAN users, and the ability to store user accounts locally.
WAN Network Connections
WAN, or Wide Area Network, is a network that covers a wide area and can connect LANs in different locations. Organizations with multiple offices often use WAN to connect all their devices and enable communication.
WAN Connection Types
WAN connections can be established using fiber or copper telephone lines, satellite links, or radio links. Unlike LAN, WAN infrastructure is usually managed by external providers due to its high cost.
Network Hardware
To connect devices to a network, certain hardware components are needed. These include routers, switches, and Network Interface Controllers (NICs) for wired and wireless connections.
Client-Server Network Model
In a client-server network, files and software are centrally stored on a server. The client sends requests to the server, and the server responds, making it easier to manage centrally stored files, backups, security, and mass updates.
Peer-to-Peer Networks
Peer-to-peer networks do not rely on servers, and devices connect directly to each other. This type of network is commonly used in home settings and does not require expensive hardware.
The Internet as a Worldwide Collection of Computer Networks
The internet is a worldwide collection of computer networks that enables global communication based on the client-server model. Different types of web servers such as mail servers and media servers handle various functions, and hosting refers to the storing of files and data on web servers.
Domain Name Servers
Domain Name Servers enable users to access websites using domain names instead of network addresses. Every website has a network address, and domain name servers are distributed globally to translate domain names into network addresses.
The internet is a massive WAN, and understanding network topologies and hardware components is essential for building and managing modern computer networks. Understanding LAN and WAN connections, client-server networks, peer-to-peer networks, and the role of domain name servers is crucial for effective network management and communication. Whether it's a small LAN in a building or a global WAN connecting multiple sites, the underlying principles remain the same.
