[Part 1 of this article looks at the IP header, the IP checksum and fragmentation.] IPv6 The current IP address scheme of 32-bit words is fast becoming inadequate. It would appear that 2 32 = 4 294 ...

I had an assignment at university that dealt with the size of a message after being sent through two different types of networks with different packet sizes and network headers. That's all we were ...

This is causing me some grief, because it's resulting in SPF failures. The FQDN in the mail headers is correct, but the resolved IP is not. It appears to be a gateway address or something (last valid ...

Have you ever performed surgery on data packets? There are times when that may be the best way to troubleshoot and optimize your network. This edition of the Packet Professor will get you started in ...

Voice over IP (VoIP) is the descriptor for the technology used to carry digitised voice over an IP data network. VoIP requires two classes of protocols: a signaling protocol such as SIP, H.323 or MGCP ...

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) constitute the vast majority of packets the average Internet user sends and receives. Inevitably, errors will at some point work ...

IPv6 increases IP address space to 128 bits, thus increasing the pool of addresses from IPv4's 2^32 to 2^128, or 340,282,366,920,938,463,463,374,607,431,768,211,456 ...