Answer:
TACACS+
Explanation:
TACACS+ or terminal access controller access-control system plus is an open standard protocol developed by Cisco. It encrypts all communication in a network ( including the password and data sent) and supports a separate authentication, authorisation and accounting policies for access to a centralised database.
It also uses the transport layer protocol TCP for a reliable data communication.
Answer: D) Service Level Agreement.
Explanation: A service Level Agreement, also known by the acronym SLA, is a written agreement between a service provider and its customer in order to set the agreed level for the quality of such service. The SLA is a tool that helps both parties reach a consensus in terms of the level of service quality, in aspects such as response time, time availability, available documentation, personnel assigned to the service, among others.