Exterior Gateway Protocol Border Gateway Protocol (BGP) Interior Gateway Protocol Routing Information Protocol (RIP) Enhanced Interior Gateway Protocol (EIGRP) Open Shortest Path First (OSPF) Intermediate System to Intermediate System (IS- IS)
A switch is a layer 2 (L2) device that is used to connect computers, printers and servers within a building or campus. L2 address is the Ethernet MAC address A switch contains physical interfaces called ports and communicates via frames. L2 switches make their forwarding decisions based on tables that store the mapping between MAC addresses and switch ports. Multilayer switches, making the forwarding decisions based on the L3.
Routers/Switches depend on two types of software for their operation: IOS and configuration file The Cisco Internetwork Operating System (IOS) is the system software in Cisco devices. Configuration files contain the Cisco IOS software commands used to customize the functionality of the Cisco device. A network administrator creates a configuration file that defines the desired functionality of a Cisco device.
The IOS is generally accessed using a Command Line Interface (CLI). (GUI – SDM, CCP) To access the CLI environment. Console - the default location for performing device management and configuration. VTY (virtual terminal line) – allows remote administration via Telnet or SSH AUX port (router only)