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.
Network Protocol is a set of rules that governs the communications between computers on a network. Rules of Network Protocol include guidelines that regulate the following characteristics of a network: access method, allowed physical topologies, types of cabling, and speed of data transfer.