Quotes About IPv4

NTP Using a Loopback Interface for Better Availability An NTP server will accept NTP messages arriving to any of its IPv4 addresses by default. However, the clients reference a specific IP address on the NTP server. That creates an availability issue.

Routing – Enhances the environment for IPv4 unicast routing. VLAN – Supports the CAM table's growth to contain the maximum number of unicast MAC addresses. Very important: This template disables hardware routing.

Their Internet usage is growing very rapidly, and even they can do the math: If everyone in China needed an IPv4 address - just one - this country would use up one third of the entire public IP address space.