Did you ever receive a suspicious email you wanted to track down to know more about the sender? While modern email services do come with a lot of built-in security features, keeping a check on the ...

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 ...

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 ...