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SWITCHING

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GUESTBOOK

4. Describe how switches facilitate Multicast Traffic

Multicast is a frame that will only be processed by multicast members on the broadcast domain.

By default, routers do not forward multicast traffic unless they are multicast capable and have a multicast routing protocol such as DVMRP (Distance Vector Multicast Routing Protocol) or PIM (Protocol Independent Multicast).

Important multicast addresses

224.0.0.1 - All multicast-capable hosts on the segment
224.0.0.2 - All multicast-capable routers on the segment
224.0.0.4 - All DVMRP routers on the segment
224.0.0.5 - All OSPF routers
224.0.0.6 - All OSPF DRs
224.0.0.9 - All RIPv2 routers
224.0.0.13 - All PIM routers

Configuring IP multicast routing process

Basic task
1. Enable IP multicast routing
2. Enable PIM on an interface
Optional advanced task
1. Configure a rendezvous point
2. Configure the TTL threshold
3. Joining the multicast group
4. Changing the IGMP version
5. Enable CGMP

Exam 4

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