Types of Router

• Edge router: Also called a Provider Edge router, is placed at the edge of an ISP network. The router uses External BGP to EBGP protocol routers in other ISPs, or a large enterprise Autonomous System.
• Subscriber edge router: Also called a Customer Edge router is located at the edge of the subscriber's network, it also uses EBGP protocol to its provider's Autonomous System. It is typically used in an (enterprise) organization.
• Inter-provider Border Router: This type of router is for Interconnecting ISPs, this is a BGP speaking router that maintains BGP sessions with other BGP speaking routers in other providers' ASes.

• Core Router: A router that resides within the middle or backbone of the LAN network rather than at its periphery. In some instances, a core router provides a step-down backbone, interconnecting the distribution routers from multiple building of a campus (LAN), or Large enterprise Location (WAN). They tend to be optimized for a high bandwidth.

• Wired and Wireless Routers:  Home and small office networking is becoming popular by day by the use of IP wired and wireless router. Wired and wireless routers are able to maintain routing and configuration information in their routing table. They also provide the service of filtering traffic of incoming and outgoing packets based on IP addresses.