Basics

Question 1

What is PIM?

Answer 1

Protocol independent multicast

Question 2

What type of protocol is PIM?

Answer 2

Multicast Routing Protocol

Question 3

What is the purpose of a multicast routing protocol?

Answer 3

A multicast routing protocol such as PIM provides a mechanism to forward packets sent to a multicast address to all members of the multicast group.

Question 4

What is the purpose of IGMP snooping?

Answer 4

IGMP snooping allows a switch to build a table of all addresses and interfaces that have sent IGMP requests and then use that to forward relevant multicast packets later.

Question 5

What is IGMP

Answer 5

Internet group management protocol

Question 6

Where do hosts need to send IGMP requests to to ask to join a group?

Answer 6

Their gateway router

Question 7

Is all multicast traffic TCP or UDP?

Answer 7

UDP

Question 8

What multicast address is All Hosts?

Answer 8

224.0.0.1

Question 9

What range do all multicast addresses exist within?

Answer 9

224.0.0.1 - 239.255.255.255

Question 10

Does IGMP use TCP or UDP

Answer 10

Neither, IGMP sits similiar to ICMP. It has an ip header and an igmp header, no UDP or TCP header.

Question 11

How does IGMPv2 allow devices to join a multicast group?

Answer 11

The device must send IGMP join messages to be added to the group.