This is a list of the world's largest armies, measured by the number of soldiers in uniform. This is not a list of the world's strongest armies, since military power is not simply a function of headcount.
Protocol is defined as the rules and customs of a group or a standard procedure. An example of protocol is the method by which a learning center must document their students' progress. YourDictionary definition and usage example.
'IP' (Internet Protocol) is the method used for sending and receiving information over the Internet. Any device that is required to communicate over the Internet is assigned a 32-bit number, its IP address, which uniquely identifies it to other devices.