Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?()
- A、Secure access to company extranet
- B、Dedicated lines for high security data transfer
- C、Simple solution for high-quality digital video using coaxial cable
- D、Data and audio signals that share the same communications infrastructure
正确答案:D
答案解析:有
微信扫一扫手机做题