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1.2 Classify Network Protocols and Communication. - Coggle Diagram
1.2 Classify Network Protocols and Communication.
Purpose of Cisco IOS
Known as Cisco Internetwork Operating System or Cisco IOS.
Embedded in all of cisco routers and operating system of catalyst switches.
Provide.
Basic routing and switching functions.
Reliable and secure access to networked resources.
Network scalability.
Router user interface
Cisco IOS software uses a command-line interface.
Accessible through several methods.
Console
Dialup
Telnet
Access Methods
Three common ways to access the ISO
Console part
Secure shell(SSH)
Telnet
Cisco IOS modes of operation
User EXEC Mode
Allows only limited number of basic monitoring commands.
Often refer as "view only" mode.
Does not allow any command that might change the configuration.
Can be identified by ">" prompt.
Privileged EXEC mode
Access all router commands.
Can be configure to require a password from user before accessing.
Configuration and management commands require network administrator to be at the privileged EXEC level.
Global configuration mode and all other mode can only be reached from the privileged EXEC mode.
Can be identified by "#" prompt.
Global Configuration mode
Allows users to modify the running system configuration.
To enter configuration, enter the command configure terminal from privileged mode.
Has various submodes, starting with global configuration mode, can be identified by (config)# prompt following the router name.
As the submodes change depending on what is being configured, the word inside the parentheses change.
For example the prompt changes to (config-if)# following the router name.
To exit, enter end or press CTRL-Z.
Configuration Command modes
the primary mode is global configuration or, global config.
use the configure terminal command to access.
changes made affect the operation of the device.
Specific sub configuration can be accesses from global configuration mode.
interface mode - to configure one of the network interfaces.
line mode - to configure the console, AUX, telnet, or SSH access.
Navigation between IOS modes
Various commands are used to move in and out of command prompts:
To move from user EXEC mode to privileged EXEC mode, use enable command.
Use return user EXEC mode, use disable command.
Various methods can be use to exit/quit configuration modes:
Exit
end
^z
How devices communicate across network media
End devices
Desktop Computer
Laptop
Printer
IP phone
Wireless tablet
Telepresence Endpoint
Intermediary Network Devices
Wireless Router
LAN Switch
Multilayer Switch
Router
Firewall Appliance
Network media
Copper
Fiber Optic
Wireless
Basic IOS command structure
Keyword
- a specific parameter defined in the operating system (ip protocols)
Argument
- not predefined a value or variable defined by the user. (192.168.10.5)