ISO Network Management Model
Security Management
The objective of security management is to manage access to network assets as indicated by local rules with the goal that the system can't be disrupted (deliberately or accidentally. There are various strategies for controlling access to Cisco routers and Catalyst routers. Some of these approaches involve ACL (Access Control Lists), Operator identifications or 'passwords' nearby the device, TACACS. TACACS is utilized by Cisco to permit a better management over who may get to the Cisco device in non-advantaged and favored mode. Numerous TACACS servers can design for adaptation to non-critical failure. With TACACS empowered, the switch and switched the client promptly for a client name and password. Verification can arrange for login management or verify person commands.
The question is : Give more details about what is ACL and how does it work and what security problem it solve to support such security management?