For managing Cisco devices, Ansible is generally considered the best-suited configuration management solution among the options provided.
Ansible is agentless, uses SSH for communication (which is common with Cisco devices), and has native modules specifically designed for managing network equipment, including Cisco IOS. It allows for streamlined automation of configuration tasks and is widely adopted in networking environments.
While Chef and Puppet are also strong configuration management tools, they are more commonly used for managing server environments and might require more setup to work with network devices. Cisco IOS is the operating system itself and not a configuration management solution.
Therefore, the best choice from the list would be Ansible.