Header compression is always mentioned in the same breath as QoS when we discuss supporting voice on an IP network. But it is not about QoS, it is about reducing bandwidth consumption. Header ...

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 ...

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 ...

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 ...

The current IP address scheme of 32-bit words is fast becoming inadequate. It would appear that 2 32 = 4 294 967 296 combinations of addresses should be enough for everybody, but in practice this is ...