Computers CCNA exam success depends on knowing the details, and nowhere is this more true than knowing the various components of a Cisco router. This is also where you can quickly start drowning in acronyms! The terms "RAM" and "ROM" probably aren't new to you, but keeping up with "what goes where" with RAM, ROM, NVRAM, and Flash Memory can be quite a challenge! In this tutorial, we'll take a look at all four of these components and their contents.ROM stands for Read-Only Memory. ROM stores the router’s bootstrap startup program, operating system software, and power-on diagnostic test programs (the POST). Business - Directory of business/finance/loan/mortgage related partner sites more 1 2 3 4 5 Computers - Directory of computer hardware/software/peripheral related partner sites more 1 2 3 4 5 Internet - Directory of webhosting/webdesign/internet marketing related partner sites more 1 2 3 4 5 Software - Directory of software related partner sites more 1 2 3 4 5 Web Design - Directory of web design/development related partner sites more 1 2 3 4 5 Web Hosting - Directory of web hosting related partner sites more 1 2 3 4 5 Web Promotion - Directory of search engine optimization/internet marketing related partner sites more 1 2 3 4 5 Web Resources - Directory of other web related partner sites more 1 2 3 4 5 Recreation - Directory of travel/hotel/cruise related partner sites more 1 2 3 4 5 Casino - Directory of online gambling/poker/blackjack/roulette related partner sites more 1 2 3 4 5 Health - Directory of online pharmacy/hospital/health related partner sites more 1 2 3 4 5 Shopping - Directory of online shopping/gift related partner sites more 1 2 3 4 5 Miscellaneous - Directory of all other partner sites more 1 2 3 4 5 Flash memory is generally referred to as “flash” The Cisco Internetwork Operating System (IOS) images are held here. Flash is erasable and reprogrammable ROM. Flash memory content is retained by the router on power-down or reload.RAM is short for Random-Access Memory. RAM on a Cisco router stores operational information such as routing tables and the running configuration file. RAM contents are lost when the router is powered down or reloaded.NVRAM is non-volatile RAM. By "non-volatile", we mean that the contents of NVRAM are not lost when the router is powered down or reloaded.Success on the CCNA exam depends on keeping these terms straight and knowing their contents.

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