LAN (Local Area Network)
A collection of standalone computers that transfer and share information with each other over a communication medium.
Local Area Networks (LAN) are usually used when the network objects reside in a similar geographic location (in close proximity), e.g.:
- Same university
- Same building
- Same office
- Home network
LAN networks scale
||Number of objects
(Computers, printers, servers)
||Average of 10-100 objects
||Average of 100-500 objects
||Average of 500+ objects
In addition, LANs networks are usually less expensive than WANs networks, the reason is the close proximity of the network objects.
To allow communicationб IT team can use a basic Hardware such has modems, wireless Modems, Hubs and regular communication cables.
WAN (Wide Area Network)
Think about LANs and multiply it.
Wide Area Networks is a combination of multiple LANs located in a different geographical location (in other words, we have few LANs located under a different physical location).
The connection between the LANs accomplished with a specific set of Hardware devices that cost much more that they once used to build the LAN network. Among those devices we can find Satellite links, communication lines (Phone lines, dedicated ISP lines and more) that allow the communication between different LANs.
The real power of WAN networks can be explained in a very simple way.
The Internet is a complex system built from massive amount of linked networks that exists worldwide and allow the users to communicate with other people (Remote login, Mail systems, Facebook, websites and more).
VPN (Virtual Private Network)
VPN network is a basic way to connect to your local network (LAN) from anywhere you desire.
VPN uses a technique called “Tunneling” used to send and receive any data across the public and private networks.
A VPN connection is usually established by creating a Virtual “Point-to-Point” using a dedicated connection (Tunneling, Encryption).
Using VPN you can access to your company resources with the same security as you work on your company personal computer. In addition, you can access the company services (Mail, dedicated application Etc.).
Wireless Local Area Networks (WLANs)
WLAN networks use the radio frequency (RF) technology to communicate and exchange data over the air (No need to use physical cables between the LANs).
WLAN have a great advantage over LANs because they allow the users to access the data without the need to connect a physical cable to the local LAN, which can save time and allow users to use different devices such as phones, tablets and any other objects that can work with RF technology.
This freedom does not come without a price: to access such devices users should authenticate against the LAN with a specific authentication protocol, the two main protocols that support such networks are WEP and WPA.