Ccie R&s Written Igmp

Front 1

IGMP

Back 1

Internet Group management protocol

Front 2

What is IGMP?

Back 2

Host to router protocol that allows hosts to request a join to the multicast group

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IGMP Version 1

Back 3

hosts drop off silently, inefficient

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IGMP Version 2

Back 4

Like Version 1, but with LEAVE GROUP message

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IGMP Version 3

Back 5

Makes source specific Multicast possible

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IGMP Version 2 host messages (3)

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Membership Report
Version 1 Membership Report
Leave Group

Front 7

IGMP Version 2 membership report

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sent when a host wants to join the group or in response to a Membership Query

Front 8

IGMP Version 2 two types of queries used by routers

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General Query
Group-Specific Query

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IGMP Version 2 General Query

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Any multicast capable groups and members

Front 10

IGMP Version 2 Group-specific query

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specific multicast group

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true or false, IGMP Version 2 is backwards compatible with Version 1

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True

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In the membership report, the destination address is the ______ address

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group

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IGMP version 2 features a ______Query

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group-specific

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New messages added to IGMP Version 3

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Group-and-source-specific query
other messages modified to include request for a specific source

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IGMP Version 3 creates a _______ relationship for a multicast app out what may have been a MANY to MANY model

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ONE to MANY

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IGMP Version 3 members can express...

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INCLUDE and EXCLUDE filter requests

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What is the default IGMP version on cisco routers?

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Version 2

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destination IP address used in an IGMP Leave Group Message

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224.0.0.2

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messages sent by a route running ICMP Version 2

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Group-specific Query
General Query

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destination IP address used in an IGMP General Query

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224.0.0.1

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router response after receiving an ICMP leave group message?

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Group-specific query

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router that is responsible for sending IGMP queries on LAN segment

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router with lowest IP address

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when DR receives (S,G) join request with the G address in SSM address range, it.....

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must initiate a (S,G) join

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new IGMP query created for IGMPv3

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Group and source specific query

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destination address used in an IGMPv3 membership report message

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224.0.0.22

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number of bits anycast RP address should use

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32

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in the event of Anycast RP failure

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IGP converges and another RP becomes activve for more devices in the area

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the ip pim autorp listener command causes 224.0.1.39 and 40 to operate in which mode

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dense

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default sparse mode keepalive interval (join messages)

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60 seconds

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the sparse mode join message lists

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all route entries for which the destination router is the previous hop router

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the ip pim message-interval can change..

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the default 60 second interval

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IGMP version 3 removed the membership report suppression feature from 1 and 2 because...

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-default holdtime is 4 minutes for sparse mode join messages
-a single membership report now bundles multicast group messages
-to simplify message processing for hosts