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 ...

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 ...

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 ...

If you use Office 365's webmail interface to prevent email recipients from seeing your local IP address, you are out of luck. When sending email through Office 365, your local IP address will be ...

The purpose of the network layer is to help route messages between different local networks. Central to this layer is the concept of exclusive network addresses, where every terminal connected to the ...

Whether it’s wired or wireless, most data communications today happens by way of packets of information travelling over one or more networks. But before these networks can work together, though, they ...