Friday, July 23, 2010

BSCI - Study Pointers - Multicast

Multicast:

Disadvantages of Multicast:
  • Lack of congestion control results in increased network degradation as the volume of network traffic rises
  • Best effort delivery - can lead to packet drops affecting VOIP/Video delivery
  • Eavesdropping is a security issue due to the nature to the protocol
Further points:

  • 224.0.1.1 = NTP protocol
  • GLOP and Limited scope addresses are types of Multicast address
  • RP-Announce msgs sent to 224.0.1.39
  • RP-Discovery msgs  (group-to-RP mapping msgs) sent to 224.0.1.40

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