Patong na aplikasyon

Ang Patong na aplikasyon(application layer) ay isang patong ng TCI/IP at ang pampitong patong ng OSI model.

Sa TCP/IP ay naglalaman ng mga protokol at paraan na nahuhulog sa sakop ng proseso-sa-prosesong komunikasyon sa buong Protoko na Internet(Internet Protocol) na kabalikat.

Halimbawa 
 AFP, Appletalk Filing Protocol
 AIM, AOL Instant Messenger Protocol
 APPC, Advanced Program-to-Program Communication
 BitTorrent
 CFDP, Coherent File Distribution Protocol
 DHCP, Dynamic Host Configuration Protocol
 FTAM, File Transfer Access and Management
 FTP, File Transfer Protocol
 Gopher, Gopher protocol
 HTTP, HyperText Transfer Protocol
 IMAP, Internet Message Access Protocol
 IRC, Internet Relay Chat
 iTMS, iTunes Music Store Protocol
 LDAP, Lightweight Directory Access Protocol
 Modbus
 NNTP, Network News Transfer Protocol
 POP3, Post Office Protocol
 SIP, Session Initiation Protocol
 SMTP, Simple Mail Transfer Protocol
 SNMP Simple Network Management Protocol
 SSH, Secure Shell
 TELNET, TELEphone NETwork
 TFTP, Trivial File Transfer Protocol
 TSP, Time Stamp Protocol
 X.400
 X.500
 XMPP, Extensible Messaging and Presence Protocol

OSI protocols