Which of the following configuration management tools uses agentless architecture for managing network devices?

(A) Ansible
(B) Puppet
(C) Chef
(D) Ansible and Puppet
(E) Puppet and Chef

Ansible is the correct answer.

Agentless architecture means that the configuration management tools do not rely on any code (agent) running on the network device. This is accomplished by communicating with the software that is already installed on the computer, including the operating system and natively installed components. Ansible uses Agentless architecture and relies on features typical in network devices, namely SSH and/or NETCONF, to make changes and extract information.