Almost every network has a DHCP (dynamic host control protocol) server that dynamically assigns unique IP addresses, most of which have a limited period of validity. The server also communicates information to clients about suitable gateways and to the DNS server for name resolution. It can be difficult to keep track of the IP addresses that a DHCP server assigns on the network, but tools like Arp, Fping, and Nmap help maintain an accurate overview.

It is important to the flawless operation of the system that the defined IP block reserved for the service allow a sufficient number of addresses to be continuously assigned to all of the devices. It is especially important to have an appropriately sized IP block when setting up a public WiFi network, because an inadequate IP block can quickly lead to bottlenecks in network access and ultimately to user dissatisfaction.

When public access is essential to a setting such as a cafÈ or a co-working space, it is important to know how much adaptation is necessary and when circumstances demand it. At the same time, it is a good idea to make sure that all computers in the network have suitable settings rather than static IP addresses that can obstruct concurrent clients.

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