In which layer of the OSI model does Real-Time Transport Protocol (RTP) operate ?

A. Network
B. Application
C. Transport
D. Session
Correct Answer: C
Section: Voice Video
Explanation
Explanation/Reference:
OSI MODEL, LAYERS & PROTOCOLS
7 Application
Web Browser, Email, Print Serivces, SIP, SSH and SCP, NFS, RTSP, Feed, XMPP, Whois, SMB; DNS; FTP; TFTP; BOOTP; SNMP;RLOGIN; SMTP; MIME; NFS;
FINGER; TELNET; NCP; APPC; AFP; SMB
6 Presentation
XDR, ASN.1, SMB, AFP, NCP, MIDI, HTML, GIF, TIFF, JPEG, ASCII, EBCDIC
5 Session
TLS, SSH, X.225, RPC, NetBIOS, ASP, Winsock, BSD
4 Transport
TCP, UDP, RTP, SCTP, SPX, ATP Gateway, Advanced Cable Tester, Brouter
3 Network
IP, ICMP, IGMP, BGP, OSPF, RIP, IGRP, EIGRP, ARP, RARP, X.25, NETBEUI Brouter, Router, Frame Relay Device, ATM Switch, Advanced Cable Tester, DDP
2 Data Link
Ethernet, Token ring, StarLAN, HDLC, Frame relay, ISDN, ATM, 802.11 WiFi, FDDI, PPP, Bridge, Switch, ISDN Router, Intelligent Hub, NIC, Advanced Cable
Tester, ARCNET, LocalTalk, FDDI, ATM. NIC Drivers: Open Datalink Interface (ODI), Network Independent Interface Specification (NDIS)
1 Physical
NIC, Twisted Pair, Coax, Fiber Optic, Wireless Media, Repeater, Multiplexer, Hubs, (Passive/Active), TDR, Oscilloscope, Amplifier, Carrier pigeon

TCP LAYERS
4 Application (OSI – Layers5 through 7)
HTTP, FTP, DNS (Routing protocols like BGP and RIP, which for a variety of reasons run over TCP and UDP respectively, may also be considered part of the
Internetwork layer)
3 Transport (OSI – Layers4 and 5)
TCP, UDP, RTP, SCTP (Routing protocols like OSPF, which run over IP, may also be considered part of the Internetwork layer)
2 Internetwork (OSI – Layer 3)
For TCP/IP this is the Internet Protocol (IP) (Required protocols like ICMP and IGMP run over IP, but may still be considered part of the Internetwork layer; ARP
does not run over IP)
1 Link (OSI – Layers 1 and 2)
Ethernet, Wi-Fi, MPLS, etc.

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