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 ...

You might think that connecting anonymously to a public Wi-Fi network doesn’t reveal much about you. You might be using a VPN (virtual private network) to protect everything you do. Even if you aren’t ...

The 240/4 block of IPv4 addresses – the six percent of the available IPv4 space that is currently not available for public use – should be left alone rather than being added to the pool of available ...

Few people would argue the importance of IP addresses to network operations, but many don’t make managing them a priority in their environment, especially in tough economic times. Recent research from ...

Breaks down the five IP address classes in order to explain how they manipulate TCP/IP protocol functionality Before two or more computers can communicate with each other, a set of rules has to be in ...

Just ask any economist: When a commodity is in short supply, several things happen. The price goes up, rationing begins, and people start scrambling for substitutes. Globally unique Internet addresses ...

Although the Class A network has only 254 unique network addresses, it can contain approximately 17 million unique nodes, which can make subnetting such a network a nightmare. Getting up to speed with ...

A subnet is a subdivision of a local area network, created by applying a subnet mask to the IP addresses that make up the network. Subnets may or may not correspond to physical locations, as the ...

The phrase software-defined networking (SDN) was coined when it was necessary to distinguish the concept from the hardware-based variety. Since that time, "SDN" has come to mean the type of dynamic ...