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Multicast Listener Discovery
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<p>Multicast Listener Discovery (MLD) is a component of the <a href="/facts/Internet_Protocol_Version_6/d4dg7kIL">Internet Protocol Version 6</a> (IPv6) suite. MLD is used by IPv6 routers for discovering <a href="/facts/Multicast/D9IspSfl">multicast</a> listeners on a directly attached link, much like <a href="/facts/Internet_Group_Management_Protocol/MEzn1aTF">Internet Group Management Protocol</a> (IGMP) is used in <a href="/facts/IPv4/bnQ5MEqm">IPv4</a>. The protocol is embedded in <a href="/facts/ICMPv6/da3RlVb8">ICMPv6</a> instead of using a separate protocol. MLDv1 is similar to IGMPv2 and MLDv2 similar to IGMPv3. </p>