Câu 189: N10-007: CompTIA Network+ 2018

A network administrator has signed up for service with a new ISP. The administrator was given the IP address of 172.17.10.254/30 to use on the external interface of the Internet-facing router. However, the network administrator cannot reach the Internet using that address. Which of the following is the MOST likely explanation?

1. A. The address provided by the ISP has a mask that is too small to be used and needs a larger mask.
2. B. The address provided by the ISP is a private IP address space and is not routable on the Internet. — đáp án hiện tại
3. C. The address provided by the ISP is the wrong one; they should be using 172.17.10.252/30.
4. D. The address provided by the ISP is part of the reserved loopback address space and cannot be used.