A Point-to-Point topology involves a direct link between two devices (this is also called a one-to-one connection). This type of connection is often utilized in WAN topologies, especially in some of the legacy Point-to-Point technologies like T1/E1 and T3/E3. Those types of connections go directly from one router to another router, as shown in Figure 17.3 below:
Figure 17.3 – Point-to-Point Topology
You will also see point-to-point connections between buildings in a campus, which are connected using fiber links that are directly attached to a network device on each side.