When we receive a goodby packet about a host, and we have a cache entry about the host, we do not immediately remove the cache entry, but update it with TTL 1. See RFC 6762 section 10.1 and3755027c2c. If we receive a request soon after the goodby packet, previously the entry was included in the known answers section of the reply. But such information should not be appended. Follow-up for3755027c2c.
System and Service Manager
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