Network address translation and port address translation (NAT/PAT) originally were solutions for the depletion of the IPv4 addresses, and now are used by growing corporations to securely expand their ...

In the beginning, a packet-filtering router had the intelligence to look at each TCP/IP packet header and make decisions on whether to pass or drop the packet. Such a solution was often called a plain ...

In the last issue we started following a packet's journey from the wire up to the higher levels of network stack processing. We left the packet at the end of layer 3 processing, where IP has ...