Types of memory on a Cisco device

Cisco devices usually have four types of memory that are being used for different purposes. These four types are:

  • ROM (Read-only memory) – stores a bootstrap program that is used to initialize a boot process. This is a read-only type of memory, so it can’t be altered.
  • RAM (Random Access Memory) – the running configuration and routing tables of the device are stored here. This type of memory loses its content when a device is restarted.
  • Flash memory – used to store IOS software images. Can also be used to store other files, for example backup configuration files.  Retains its content even after a device is restarted.
  • NVRAM (Nonvolatile RAM) – usually used to store a startup configuration file. This type of memory retains its content even after a device is powered down or restarted.

Prerequisites for 200-301

200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, and even some programming concepts. As with other Cisco certifications, you can take it at any of the Pearson VUE certification centers.

The recommended training program that can be taken at a Cisco academy is called Implementing and Administering Cisco Solutions (CCNA). The successful completion of a training course will get you a training badge.

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