Storage Classification of Cisco routers and password settings for four execution modes and different access modes

This article mainly introduces the Storage Classification of Cisco routers, as well as four execution modes and password settings for different access methods. I hope this article will help you.

Memory category:

1: RAM: Random Access to memory, equivalent to computer memory

2: ROM: read-only memory. Some microcodes used to start and maintain the router are resident in the ROM.

3: FLASH Memory, equivalent to a computer's hard disk, stores IOS file Images

4: NVRAM: used to store STARTUP configuration files

Four execution modes:

1: User Mode: You can view but cannot change the vro settings

2: privileged mode: You can use some privileged commands to view more messages and change certain vro settings.

3: Global mode: You can change the vro settings and update the settings being executed in RAM.

4. other configuration modes: You can change the specific sub-configuration settings of the vro and update the settings being executed in RAM.

Password settings for different access methods:

Console port password settings

Router (config) # line console 0

Router (config-line) # login

Router (config-line) # password 123

Virtual port remote login:

Router (config) # line vty 0 4

Router (config-line) # login

Router (config-line) # password 123

0 4 indicates that virtual remote terminals 0 to 4 are allowed.

AUX port

Router (config) # line aux 0

Router (config-line) # login

Router (config-line) # password 123