LAN


 * LAN: Local Area Network**
 * Connecting computers close to each other using cables or wireless means.
 * Computers that are on the same LAN can share files, software, hard disks, hardware and can communicate with email. Data is transmitted very fast between computers on the same network.
 * **File servers** contain a collection of user accounts which can be accessed on any computer connected to the network with a username (identification of the correct files) and a password (ensures the accounts safety).


 * Types of LAN:**
 * **Client/Server networks.**
 * Client computers (any user’s computer) communicate with each other by connecting to a network which has servers.
 * The servers can be file servers, print servers, etc.
 * A server has a fast processor, more RAM and backing storage.
 * **Peer to peer networks.**
 * Networks which allow computers to communicate to each other directly.
 * Users can collect data from any computer on the network.


 * **Cabled LAN**
 * Machines on a network share files via cables.
 * The machines require a NIC (network interface card) and the network cable is plugged in to them.
 * **WLAN (Wireless LAN)**
 * Wireless access point.
 * Radio receiver, encryption, communication software.
 * Routers enable several computers on the access point.
 * Network interface cards (NIC) receives the wireless signals.