Types of Network - SkyNet-SH

Hello and welcome to another post here at 'SkyNet-SH'. Today I will be explaining the different types of networks; LAN, WAN and Wireless. I will be giving a definition and then I will be supplying a clear diagram, showing basically how each network functions. 

LAN (Local Area Network)

Figure 1. LAN Diagram (Thecustomizewindows.com, 2013)

LAN stands for Local Area Network and is a network used for small area, such as; small offices and homes. Data is transmitted through the telephone line and radio-waves and can arrive at fast rates. A group of two or more LAN networks is known as a WAN (explained below).

The Ethernet cable is the most common type of LAN for a PC, whereas AppleTalk is the alternative for Apple systems.

WAN (Wide Area Network)

Figure 2. WAN Diagram (Domainshane.com, 2012)

WAN stands for Wide Area Network and can generally span over large geographical locations. This network consists of two or more LAN networks. Computer systems and devices are connected through public networks, such as the telephone line. 

An example of a globally large scale WAN would be the Internet due to it covering almost all land-mass in the world.

TCP/IP is the protocol used for a WAN network in combination with devices and computer systems, such as; routers, switches, firewalls and modems. 

Wireless Network (WI-FI)

 Figure 3. Wireless Diagram (A248.e.akamai.net, 2014)

WI-FI is a rapid growing, popular wireless network that transmits data through radio-waves. Due to security reasons sometimes a password is needed in order to gain access to that network, therefore the Internet. Wireless networks are available in public places, such as; cafés and restaurants and also generally busy, populated areas, but are connected to at the user's risk, due to the insecure encryption allowing the possibility of an authorised, unknown person browsing through confidential files and information, while sitting at their own separate device. Although new devices come pre-built with wireless functionality, some old devices may not be able to connect to the wireless network, meaning that a wireless card may be needed. 

FACT: The common misconception of WI-FI is that means 'Wireless Fidelity', however this is untrue and WI-FI is just a trademarked phrase that means 'IEEE 802.11x'. (Webopedia, 2014.)