September 2008
Intermediate to advanced
384 pages
9h 5m
English
Content preview from Voice over IP Security
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This chapter covers the security profiles in the following VoIP protocols:
• H.323
• Session Initiation Protocol (SIP)
• Media Gateway Control Protocol (MGCP)
CHAPTER 3Security Profiles in VoIP Protocols
Three protocols are dominating in VoIP network today: H.323, Session Initiation Protocol (SIP), and Media Gateway Control Protocol (MGCP). SIP and H.323 are peer-to-peer session protocols that are necessary for global VoIP service, especially interconnecting heterogeneous service networks. MGCP is a device control protocol that provides a simple and centralized mechanism of controlling media gateways. Similar control protocols are H.248 (Megaco), Network-based Call Signaling Protocol Specification (NCS), and Skinny Call Control Protocol ...