application-layer-protocol As a command 19 categories below application-layer-protocol Narrow by messaging-protocol 4 email-protocol 3 hypertext-transfer-protocol 3 act 2 activity 2 cognition 2 concept 2 cryptographic-protocol 2 event 2 idea 2 procedure 2 email-protocol 3hypertext-transfer-protocol 3messaging-protocol 4amqpdhcpfile-transfer-protocolhttp-2http-3httpsinternet-message-access-protocolldapmatrix-protocolmqttnetwork-time-protocolpost-office-protocolsecure-shellsimple-mail-transfer-protocolssh-file-transfer-protocolxmpp