Which type of memory stores the configuration of a router or switch by default
Router memory Show Home Previous Up Next Q16. Where does the bootable IOS image (bootstrap code) is stored on a Cisco router? A. RAM B. ROM C. Flash memory D. NVRAM Correct Answer: B Explanation: Typically, a Cisco router has the following types of memory components: 1. RAM (or DRAM): This type of memory is used for working storage. This is where part of IOS image, routing tables, packets, and others are stored during normal working of a router. RAM is erased when the router is powered off. Home Previous Up Next It may often seem like nothing more than a sleek metal box on the outside, but the internal memory components of a Cisco router represent where much of the real magic takes place.Speak of a Cisco router is being really no more than a specialized computer running a custom operating system. In this case, it is a computer optimized to provide routing and related functions. Instead of relying on a hard disk for storage, a Cisco router relies on different types of memory, each with a different purpose. In this article we’ll take a look at each of these different storage areas, and the functions they’re responsible for. There are four main memory areas within a Cisco router that it’s important to be familiar with, namely Flash, RAM, ROM, and NVRAM. Flash Memory Flash memory for a Cisco 2500 series router ranges in size from a minimum of 4MB up to a maximum of 16MB. You might consider adding additional Flash memory to meet the space requirements of the IOS version that you have chosen to run. For a Cisco 2501, the base IP version of IOS 12.0 requires a minimum of 8MB of Flash memory. So, if you had a Cisco 2501 that shipped with only 4MB of Flash, you would require at least one additional 4MB SIMM. For IOS versions with more advanced feature sets, it is not uncommon to require at least 16MB of Flash. When installing or upgrading Flash using multiple SIMMs, it is important to note that they must be the same size. For example, if you already have 4MB of Flash and wish to upgrade, you can either replace the 4MB SIMM with an 8MB SIMM, or simply add a second 4MB SIMM. You cannot mix and match SIMMs with different storage capabilities. As such, you cannot have one 4MB and one 8MB SIMM installed at the same time – their storage capabilities must equal. RAM By default, RAM is broken up into two main areas – Main Processor Memory, and Shared I/O Memory. Main Processor Memory is where the routing table, ARP tables, and running configuration are stored. Shared I/O Memory is used as a buffer location for temporarily storing packets prior to processing. Most Cisco 2500 routers will have 2MB of RAM soldered to the system board (this amount, however, depends on the revision number of the router), along with one SIMM slot to add additional RAM. The maximum amount of RAM that can be added to a Cisco 2500 is 16MB. If 16MB is added, that provides a maximum of 18MB of available RAM. In cases where a RAM SIMM is installed, its capacity will be used as Main Processor Memory, while the onboard RAM (2MB) will be used as Shared I/O memory. If no SIMM chip is present, that 2MB of on-board RAM will be split between both areas, providing each with 1MB of working space. This should be avoided for performance reasons. ROM
NVRAM Knowing what’s going on where is an important part of not only understanding how a Cisco router operates, but will also help to determine the source of problems or issues, should the need arise. Remember – just because something can’t be seen, that doesn’t mean it’s not important. What type of memory is used to store the configuration of the router?2. Non-Volatile Random Access Memory (NVRAM) : NVRAM is used to store the startup configuration file. Startup configuration files are the copies of the Cisco Router Configuration file and they are retained after the router is restarted or rebooted.
What type of switch memory is used to store the configuration?Explanation. The running configuration is stored in the RAM (Random Access Memory).
What types of memories are used in the Cisco switch?In total, 4 different types of memory are found in Cisco devices.. RAM (DRAM). Flash Memory.. ROM (EPROM). NVRAM.. Which memory location on a Cisco router or switch stores the startup configuration file?The startup configuration file of a Cisco router or switch is stored in NVRAM, which is nonvolatile memory.
|