Router fundamentals
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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.
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The document discusses the internal components of a router, including RAM, NVRAM, Flash, and ROM. RAM stores temporary configuration files and routing tables, while NVRAM stores backup configuration files. Flash holds the Cisco IOS operating system, and ROM contains the POST and bootstrap programs. Interfaces provide network connections for packets. When booted, the router loads the IOS from Flash into RAM, along with configuration files from NVRAM and routing tables. Status commands like "show version" and "show running-config" display information about the router's components, configuration, and protocols.
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3. Common router operating systems are Cisco IOS and Juniper JUNOS. Cisco IOS is customized for Cisco devices and provides tools for management, memory allocation, and file storage. Juniper JUNOS offers a modular architecture and policy-based traffic controls.
Basic about-router
A router is a networking device that operates at the network layer and connects different networks. It selects the best and shortest path for packet forwarding based on its routing table, and can filter traffic using access control lists. Routers have various ports including console, auxiliary, Ethernet LAN ports, and serial WAN ports used to connect to other routers and modems. The Cisco IOS software controls router functions and is loaded during bootup from flash memory or a TFTP server.
Basics to Configure NW Device
The document discusses Cisco IOS, the operating system used in Cisco networking devices. It describes Cisco IOS features like routing, switching and security services. It also covers Cisco IOS access methods such as console, Telnet, SSH and AUX ports. The document then discusses Cisco IOS modes like user EXEC, privileged EXEC and global configuration modes. It provides examples of basic IOS commands and configuration tasks like configuring device information, passwords, interfaces and testing connectivity.
CCNA3 Verson6 Chapter1
This document discusses designing scalable campus wired LANs and selecting network devices. It covers hierarchical LAN designs with access, distribution and core layers. When expanding networks, methods like redundancy, smaller failure domains and link aggregation are used. The document also discusses selecting switches and routers based on requirements, with considerations like port density, forwarding rates, wire speed, PoE and form factors. Basic device configuration and management commands are also outlined.
Ciscorouterasavpnserver 100218045815-phpapp01
Cisco routers can serve as VPN servers to provide secure remote access to internal networks. The router must be configured with AAA authentication and authorization, virtual templates to dynamically assign interfaces, and VPN protocols like IPSec or VPDN to encrypt traffic and establish secure tunnels. Example configurations showed setting IKE/IPSec policies, client pools, dynamic maps, and applying the crypto map to the external interface to enable VPN connectivity.
CCNA Icnd110 s04l01
The document discusses routers and routing. Routers contain components like a CPU, RAM, and network adapters. Routers maintain routing tables and determine the best path to forward packets between networks. The routing table contains different types of routes, including static, dynamic, and default routes. Distance vector and link-state routing protocols are used to dynamically determine routes and update routing tables.
scg basic
The document provides instructions for configuring basic parameters on Cisco Secure Router 520 Series routers, including global parameters, interfaces, static and dynamic routing, and command-line access. It describes the default configuration, required information for customization, and supported interfaces. Configuration examples are provided for global parameters, LAN/WAN interfaces, a loopback interface, and command-line access. The document also summarizes static route configuration.
router is a computer networking device that forwards
A router is a networking device that forwards data packets between computer networks. There are two main types of router interfaces: LAN interfaces connect the router to a local network, while WAN interfaces connect routers to external networks. Common types of routers include broadband routers for home networks, wireless routers that extend connectivity via WiFi, core routers that operate at high speeds in internet backbones, and edge routers that provide access to core networks. Routing protocols allow routers to share information and select the best paths between nodes on a network.
Cisco Certified Network Associate (CCNA) - R&S - Semester 2 Notes
One of the most basic networking courses is provided by Cisco Systems via the Cisco Networking Academy.
The academy provides a comprehensive program allowing students to get started in information technology and have multiple certifications.
Cisco created academies in 9,000 learning institutions spread across more than 170 countries that offer the Cisco Networking Academy curriculum.
The Associate level of Cisco Certifications can begin directly with CCNA for network installation, operations and troubleshooting or CCDA for network design. Think of the Associate Level as the foundation level of networking certification.
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router is a computer networking device that forwards
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Cisco Certified Network Associate (CCNA) - R&S - Semester 2 Notes
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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
- 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
- 17. THANK YOU