Router components allow the router to boot up and load its operating system. The router boot sequence requires all router components to start up. The Internetwork Operating System (IOS) acts as an interface between network devices and users, and is stored in the router's flash memory. Router administrative functions like assigning a hostname, banners, and passwords allow for easy troubleshooting and maintenance of routers.

1. Router Fundamentals

2. Chapter Objectives Explain router components Explain router installation Discuss router boot sequence Define Internetwork Operating System (IOS) Set hostname, banners and passwords for the router

3. Recall - I Different network devices include: Hubs Routers Switches Bridges Repeaters Different types of hubs include: Active Passive Hybrid

4. Recall - II Different WAN devices include: WAN Switch Access Server Modem Channel Service Unit ISDN Terminal Adapter

6. Routers decide the best possible route that a packet needs to take to reach its destination

8. Provide traffic management

9. Do not pass broadcast traffic

11. Router Boot Sequence The router requires all the router components during its boot up

12. Internetwork Operating System IOS acts as an interface between the network devices and the user It is stored in the flash memory of the router The Cisco IOS software requires the processor of the system for configuring and maintaining the network devices Different features of IOS include: Support for different technologies Scalability Security

13. Router Ports Router ports help to configure the router, verify its configuration and access Cisco IOS

14. Rear Panel of the Cisco Router Rear Panel of the Cisco Router

15. Router Administrative Functions Router administrative functions allow easy troubleshooting and maintenance of routers Router administrative function include: Assigning hostname Assigning banners setting password

16. Banners Banner is a message displayed to all the users when they access the router through Telnet, console and auxiliary ports It can be used to display information about the router itself or nay kind of security message Four types of banners available for the Cisco routers are: Message of the day banner Exec process creation banner Incoming terminal line banner Login banner

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