How to install dd-wrt on a Linksys WRT54GL router

http://www.youtube.com/watch?v=Kesp4pgICrk

Point to Multipoint Connection

The layout is also frequently encountered network are point-to-multipoint. If some node2 speak to the center access, this is the application of point-to-multipoint. A typical example of the layout of the point-to-multipoint is the use of wireless access points that provide connectivity to multiple laptops. Laptops do not communicate with each other directly, but must be in the region access point to be able to use the network.

Network point-to-multipoint can also be applied to our previous example at the university. For example, a remote building on the hill is connected to the center of the campus using a point-to-point. Rather than setting up multiple connections point-to-point to distribute the Internet connection, an antenna can be used as long as seen by some of these remote buildings. This is a classic example of the wide area connection point (a remote area on the hill) to multipoint (many buildings in the valley).

Please note that there are some performance issues with the use of the connection point-to-multipoint for very long distances, which will be explained later in this chapter. Type of connection may be used in some circumstances, but not to make the classic mistake by installing a radio tower with a big power in the middle of the city and expect to serve thousands of customers, like you would do with an FM radio station. As we shall see, two-way data networks behave very differently from broadcast radio.

Ref : http://opensource.telkomspeedy.com/wiki/index.php/WNDW:_Point-to-multipoint

Point to Point Connection

Connection Point-to-point usually provides an Internet connection where other access is not available. One side of the connection point-to-point Internet connection, while others use the connection to reach the Internet. For example, a university might have a frame relay or VSAT connection is fast in the middle of campus, but unable to make the connection to the important buildings that are outside the campus. If the main building on campus has an open view to the outside of campus buildings, the connection point-to-point can be used to make the two buildings are connected. This can be either additional or even replace dial-up connection. With proper antennas and line of sight, the connection point-to-point exceeding thirty kilometers is possible.

Of course, once a connection is point-to-point is created, much can be done to expand the network further. If the building is much as in the example at the top of a high hill, may be able to see other important locations that can not be seen directly from the central campus. By installing the connection point-to-point in remote areas, other nodes can join the network and use the internet connection from the center.

Connection Point-to-point does not necessarily have to involve Internet access. Suppose you have to physically drive to a remote weather monitoring station, which is high in the hills, in order to collect data and record from time to time. You can link these places by using the connection point-to-point, which allows monitoring of data in realtime, without having to travel to the site. Wireless networks can provide a large enough bandwidth to carry large amounts of data (including audio and video) between two points that have connections to each, even without any direct connection to the internet.

Ref : http://opensource.telkomspeedy.com/wiki/index.php/WNDW:_Point-to-point