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.