As a Network Engineer in a large-sized company, you have to master the knowledge of the Cisco mobility solution. Which of the following statement most appropriately identifies the characteristics of it?（）

• A、It provides high-level integrated security from the wireless access point to the client and automatically encrypts voice and data in transit.
• B、It allows you to centralize management, automate repetitive tasks, and provision IP services easily.
• C、It centralizes your infrastructure and allows you to share resources more effectively by combining separate data centers into an interconnected SAN.
• D、It authenticates users and devices so that it is impossible for a rogue device to be connected to the network.