Unicast vs Multicast

  • Routed via PIM ( Protocol Independent Multicast ).
  • Always UDP-Based ( Video, Audiostreams, some kinds of data ).
  • Typical network challenges ( QoS, Security, Bandwidth consumption).
  • Began as a ‘speciality’ technology, becoming heavily adopted in modern times.

Multicast Addresses

  • Multicast group members receive all data center to a group.
  • Multicast IPv4 Range: [ 224.0.0.0  239.255.255.255 ]
    • Filtering tip:
      • Last 23 bits of IP mapped to MAC
        • Can lead to overlapping addresses

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