Cisco IOS

Cisco Internetwork Operating System (IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches

Basic commands

 * or  (includes uptime information)

Interfaces:
 * . To display the administrative and operational status of a switching (nonrouting) port
 * . To display the administrative and operational status of a switching (nonrouting) port
 * . To display the administrative and operational status of a switching (nonrouting) port


 * or
 * or  An enable mode command that displays the current configuration
 * or  Logs you into configuration mode


 * or
 * Logs into enable mode. Also known as user exec mode or privileged mode. See also:
 * Change to level 5
 * Logs into enable mode. Also known as user exec mode or privileged mode. See also:
 * Change to level 5


 * . Enables an interface (brings it up).
 * . Enables an interface (brings it up).
 * . Enables an interface (brings it up).






 * , similar to  linux command


 * or
 * or
 * or
 * or




 * or




 * Create and delete users





Access List
Configuring IP Access Lists: https://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html#acltypes

Types of ACLs: Standard ACLs, Extended ACLs, Lock and Key (Dynamic ACLs), IP Named ACLs, Reflexive ACLs, Time-Based ACLs Using Time Ranges, Commented IP ACL Entries, Context-Based Access Control, Authentication Proxy, Turbo ACLs, Distributed Time-Based ACLs, Receive ACLs, Infrastructure Protection ACLs, Transit ACLs.







Configuration Guides

 * /Cisco IOS DHCP Server configuration/
 * /Configure public RSA key authentication/:

Activities

 * 1) Read wikipedia article about Cisco Internetwork Operating System
 * 2) Read Cisco IOS command reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/command/Cisco_IOS_Configuration_Fundamentals_Command_Reference.pdf
 * 3) Read Cisco IOS Cheat Sheet: https://www.netwrix.com/cisco_commands_cheat_sheet.html
 * 4) Configure a user with public key access /Configure public RSA key authentication/
 * 5) /Associate a user with default higher privileges/ using   command