When creating an alias, you can choose different types. You can choose from the following options:

• Host(s): This option allows you to specify one or more IP addresses or hostnames. Hostnames will be periodically re-resolved.
• Network(s): You can specify a network by specifying the network portion of an IP address and the CIDR (for example, 172.16.0.0/16).
• Port(s): You can specify a port or a range of ports (the first and last port should be separated by a colon).
• URL (IPs): You can specify one or more URLs that, in turn point to text lists of IP addresses. Lists should be limited to 3,000 or fewer addresses.
• URL (Ports): You can specify one or more URLs that, in turn, point to text lists of ports. Lists should be limited to 3,000 entries.
• URL Table (IPs): Similar to URL (IPs), but you can only specify a single URL, and the text list loaded will be refreshed at an interval of your choosing. Lists can be longer than 3,000 addresses.
• URL Table (Ports): Similar to URL (Ports), but you can only specify a single URL, and the text list loaded will be refreshed at an interval of your choosing. As with URL Table (IPs), lists can be longer than 3,000 entries.

As you can see, there are several options, including options to have the alias utilize a list or lists of IPs or ports, which in turn can be edited. Another way we can organize our aliases is to nest them, so we have aliases of aliases. For example, we might have several identical printers, each with their own IP address. We can create an alias for each printer, and then create an alias that refers to all the printers.