Unix sysadmins routinely use the “ifconfig -a” command to list network parameters associated with their systems. In particular, they use this command to determine the IP address, netmask and broadcast ...

We just saw that the mask determines where the boundary between the network and host portions of the IP address lies. This boundary is important: If it is set too far to the right, there are lots of ...

If you are using Internet or almost any computer network you will likely using IPv4 packets. IPv4 uses 32-bit source and destination address fields. We are actually running out of addresses but have ...

Work is afoot to free up several internet protocol version 4 (IPv4) address ranges which have been unroutable as reserved, invalid or used for loopback networks since the 1980s. Seth Schoen, who ...

Popular npm library netmask has a critical networking vulnerability. netmask is frequently used by hundreds of thousands of applications to parse IPv4 addresses and CIDR blocks or compare them. The ...