Join Greg Sowell for an in-depth discussion in this video IGMP, part of Foundations of Networking: Protocols and CLI Tools.
- [Voiceover] Internet Group Management Protocol is used…by hosts and adjacent routers to join multicast groups.…It is used exclusively by IPv4 hosts,…as it was supplanted by Multicast Listener Discovery…in the ICMPv6 Suite for IPv6.…IGMP allows a host that wants to receive specific…multicast traffic to solicit a local router…to have that multicast traffic sent on an interface.…There are currently three versions of IGMP.…Version 2 added the ability for a host…to exit a multicast group.…
Version 3 added support for source-specific multicast.…The vast majority of networks don't have hosts…plugged directly into router ports;…instead, they go through a switch.…By default, when a switch receives a packet…destined for a multicast address,…it will flood that packet out all ports.…I say "destined" because traffic should never…be sourced from a multicast address.…If multiple switches are connected,…then the flooding continues.…If a network has high volumes of multicast traffic,…this could unnecessarily consume resources.…
Protocols are the lifeblood of modern communication. By the end of this course, you'll know what you need to troubleshoot any network connection and keep the communication flowing.
Note: This course maps to domain 3 of the MTA Networking Fundamentals exam.
- The role of protocols in networking
- Port addresses
- ARP and InARP
- DNS and NetBIOS
- HTTP and HTTPS
- Mail protocols
- Using command-line tools to troubleshoot protocols and routing