Chapter 1 - Routing CCNA Exploration Semester 2 Chapter 1...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
1 22 Sep 2009 Routing CCNA Exploration Semester 2 Chapter 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 22 Sep 2009 Topics Identify a router as a computer with specialised hardware and operating system designed for routing Give a router a basic configuration including IP addresses Routing tables Router activities – finding the best paths and switching packets
Background image of page 2
3 22 Sep 2009 Router functions Connect networks together Find best routes Switch packets from one network to another Do this efficiently 24/7 Provide security by permitting or denying specified types of packet Separates broadcast domains Provide quality of service by prioritising packets
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 22 Sep 2009 Router as a computer CPU: control unit handles instructions, ALU for calculations RAM: volatile working storage ROM: permanent storage for POST and start- up instructions Operating System: software that runs the computer System bus, Power supply
Background image of page 4
5 22 Sep 2009 Router differences Long term storage is Flash and NVRAM, not hard disk Range of different interfaces all on different networks No input/output peripherals. Connect via a console PC and use PC’s keyboard and screen
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 22 Sep 2009 RAM Dynamic random access memory: as in a PC Temporary memory while the router is on Loses content when the router loses power or is restarted Holds running configuration Holds routing tables Holds ARP cache Holds fast-switching cache etc.
Background image of page 6
7 False True or False Ram permanently stores the configuration file.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 22 Sep 2009 NVRAM Non-volatile RAM: keeps its contents when the router is off Stores the startup configuration file When you have configured a router, you must save your configuration to NVRAM if you want to keep it
Background image of page 8
9 22 Sep 2009 Flash Electronically erasable, programmable ROM (EEPROM) Keeps its contents when the router is off Holds the operating system image (IOS) Allows the IOS to be updated Can store multiple versions of IOS software if it has enough capacity Can be upgraded by adding SIMMs
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 22 Sep 2009 ROM Permanent memory: cannot be upgraded without replacing the chip Holds power-on self test (POST) instructions Stores bootstrap program Stores ROM monitor software (for emergency download of IOS, for password recovery) May store basic IOS for emergency use (less common than it was)
Background image of page 10
11 22 Sep 2009 Router storage ROM Permanent Holds POST, boot instructions, basic IOS Flash Keeps contents Holds IOS image NVRAM Keeps contents Holds startup configuration file RAM Volatile Holds runnning config, tables, queues etc
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12 22 Sep 2009 Interfaces Can be attached directly to the motherboard (like our Fast Ethernet interfaces) Can be on removable and interchangeable modules (like our serial interfaces) Modules for different serial connections
Background image of page 12
13 22 Sep 2009 Operating system As specialised computers, routers and switches need operating systems.
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/12/2012 for the course NETWORKING 2083 taught by Professor Cathymarak during the Winter '12 term at NorthWest Arkansas Community College.

Page1 / 62

Chapter 1 - Routing CCNA Exploration Semester 2 Chapter 1...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online