The final two topologies we’re going to look at are the Point-to-Point and the Point-to-Multipoint topologies.
In a Point-to-Point topology you basically have two different nodes that are connected directly to each other with no intervening device. This topology is commonly used to connect two different ends of a WAN connection. Alternatively, it is also used to connect a computer or node directly to the switch. The connection between the switch and the computer is in reality a Point-to-Point connection. Additionally, Point-to-Point connections can be used to connect switches or routers to each other as well.
Another Point-to-Point connection you may see is a Cross-over cable connecting two different computers together enabling the two computers to talk to each other directly without having to use a hub or a switch. Point-to-Point topologies are often part of a hybrid system where the Point-to-Point connections will often form the bus connecting multiple connecting devices together. Such as multiple switches together, multiple routers together, that sort of thing. A variation on the Point-to-Point topology is the Point-to-Multipoint topology.
Basically it’s the same as a Point-to-Point topology, except instead of one device connecting directly to one other device you’ll have one device connecting directly to more than one device. This illustration shows what a Point-to-Point and a Point-to-Multipoint topology would look like. At the top you see a Point-to-Point topology where you have one switch connecting one computer, or one node. In the lower portion of the diagram you have a Point-to-Multipoint topology where you have one switch connecting three different nodes.
Now in this illustration each one of those nodes is a computer, but they can also switches, or routers, or other devices as well.
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