Cisco, Huawei network equipment

One Simulator

Two Hardware composition of network equipment

1. Flash： Storage IOS Operating system and other files , The equivalent of a computer's hard disk
2. Nvram： Storage startup-config ( Startup profile )
3. Ram： Device memory , Equivalent to computer memory
4. Rom： read-only memory , Boot up , It's like a computer bios
   

3、 ... and Command mode

3.1 Cisco command mode

1. User mode ： Prompt > Limited viewing rights

2. Privilege mode ： Prompt # View all configurations

3. Global configuration mode ：config# Configure the device

4. Interface mode : config-if# Interface configuration

5. User mode goes into privilege mode ：enable

6. Privileged mode returns to user mode ： disable

7. The privileged mode enters the global configuration mode ：configure terminal

8. Global configuration mode returns to privileged mode ： exit

9. View the configuration in global configuration mode ：do command

3.2 Huawei command mode

1. User mode ： Check the configuration
2. System mode ： Check the configuration , Modify the configuration
3. From user mode to system mode ：system-view