ccnav7 srwe skills assessment

ccnav7 srwe skills assessment.Like ROM-Like ROM, flash memory is a non-volatile memory, which means that the information in flash memory does not disappear when the router is shut down. The router stores the IOS image in flash memory, where other information, such as auxiliary configuration files, may also be stored. Note that some low-end Cisco routers run the IOS directly from flash memory, without loading it into RAM. Flash memory is slower than RAM, which can cause performance issues.NVRAM is similar to flash memory in that its contents do not disappear when the router is turned off, but is slightly different in that it uses a battery to ensure that the information stored in the Cisco device does not disappear when it is turned off. Routers (and switches) use NVRAM to store configuration files.The configuration register is a special register in the router where numerous boot and run options are determined, and this includes how the router looks for IOS images and configuration files. The configuration file takes up some of the storage space in NVRAM. As you will see later in this chapter, this register can be manipulated to affect how the router boots, and the command boot can be used to specify where to load the 10S and configuration files (this is discussed later in the section "Bootloader").Every router has at least one line and one physical interface. The line (port) is usually used to manage the device, which includes the console line and the secondary line. The interface is used to move traffic within the router and may contain a media type in its name, such as Ethernet, FastEthernet (FE), GigabitEthernet (GE \ serial, etc. These interfaces can also be used during bootup - it is possible to have the bootloader load the IOS from a remote Simple File Transfer Protocol (TFTP) server (instead of flash), provided the router contains a sufficient number of IP configurations.Exam Essentials Flash memory is used to store the operating system, while NVRAM is used to store the configuration files. Configuration registers are used to determine how the router will boot.Certification Objective 15.0215.2 Router Startup ProcessThe router will typically go through 6 steps in the boot process.The router loads and runs POST (located in ROM), which checks the hardware components including memory and interfaces. 2. The bootloader is loaded and executed.Check the configuration registers and decide how to boot (where to look for the IOS image and configuration file).