H.323 Gatekeeper

A h.323 gatekeeper is like a security guard for a network. It controls which devices can communicate with each other over a network. It works by making sure that each device has the proper security credentials (like a password) before allowing any communication. It makes sure that devices can only communicate with each other if they have permission to do so. In other words, it is like a gatekeeper that makes sure that only the right people are allowed access to the network.