This sets the maximum time, in seconds, hosts are given to respond to an IGMP query before being considered to have left the group. Setting this too low on a satellite link with inherent round-trip latency risks prematurely dropping legitimate group members whose response was simply delayed by the link itself rather than the device actually having left. For example, an aggressively short response time on a high-latency satellite path could cause a still-watching IPTV set-top box to be incorrectly dropped from its multicast group mid-stream.