Routers are the most important traffic-regulating devices on large networks. While performing these basic functions, routers can also execute many other tasks that are covered in later chapters. A router can have many different types of interface ports. Figure shows a serial port which is a WAN connection. The graphic also shows the console port connection which allows direct connection to the router to be able to configure it.
Figure shows another port interface type.
The type shown is an Ethernet port which is a LAN connection. This particular router has both a 10BASE-T and AUI connector for the Ethernet connection.