CCNP - CGMP QUERY

Hi Ive been reading through one of my CCNP pamphlets and it mentions CGMP:

qns1. What does is stand for?
qns2. What is it about?
qns3. What is it for?
mikey250Asked:
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rochey2009Connect With a Mentor Commented:
Hi,

It stands for Cisco Group Management Protocol (CGMP). It is used to help a switch decide which switch ports are members of which multicast groups so that traffic for each multicast group is forwarded to the devices that have joined a particular multicast stream. It does the same thing as IGMP but in a different way.

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a00800b0871.shtml
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mikey250Author Commented:
I was thinking it was 'CG Multicast Group' - Presumably name change!!!
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Don JohnstonConnect With a Mentor InstructorCommented:
I usually tell people that it's the equivalent of IGMP snooping.

Although, with that "C" in front, you just know that it's pretty much a Cisco only thing. :-)
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