You are designing a strategy to ensure that all employees have Internet access. For each branch office，  what should you do？（）

• A、 Configure a DNS server to function as caching-only servers
• B、 Configure Internet Connection sharing on terminal servers.
• C、 Install and configure an Internet Security and Acceleration （ISA） Server Computer
• D、 Install and configure a server running Routing and Remote Acess to function as a VPN server