Internet apps: their protocols and transport protocols

Application

e-mail

remote terminal access

Web

file transfer

streaming multimedia

remote file server

Internet telephony

Application

layer protocol

smtp [RFC 821]

telnet [RFC 854]

http [RFC 2068]

ftp [RFC 959]

proprietary

(e.g. RealNetworks)

NSF

proprietary

(e.g., Vocaltec)

Underlying

transport protocol

TCP

TCP

TCP

TCP

TCP or UDP

TCP or UDP

typically UDP

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