5.2.2: On Days 20 and 18 we discussed private addressing in reference to network address translation (NAT) and IP addressing. The following key points summarize the operation and benefits of public and private addressing:
• A device directly connected to the Internet has a public IP address. This address is routable, and other devices on the Internet can identify, locate, and request services from a device that has a public IP address.
• The number of public IP addresses is limited, so RFC 1918 reserved Class A, B, and C networks for private use on an internal network. These address ranges can be reused for multiple internal networks because the networks are not visible to the Internet or each other.
• A router running ...