What is CIDR notation and how does it relate to subnet masks?

• A. CIDR notation uses an IP address followed by /n, where n is the number of network prefix bits; it replaces dotted-decimal subnet masks and defines the network portion.
• B. CIDR notation uses a separate protocol for subnetting; the slash indicates the port number.
• C. CIDR uses dotted decimal; the prefix length denotes the host portion size.
• D. CIDR means classful addressing only.

Answer: (B)