Hi,
What is the purpose of mDNS ? It seems to be for multicast? Does that mean its usage would be to say send video to a group of workstations all at the same time? Like a corporate wide message from the CEO? What other use? It does not seem to be a unicast DNS system. That is a DNS system to find the IP address of a singular workstation/device on the network? https://en.wikipedia.org/wiki/Multicast_DNS By default, mDNS exclusively resolves hostnames ending with the .local top-level domain. This can cause problems if .local includes hosts that do not implement mDNS but that can be found via a conventional unicast DNS server. Resolving such conflicts requires network-configuration changes that mDNS was designed to avoid. https://wiki.archlinux.org/title/Avahi#Hostname_resolution 2.1.1 Configuring mDNS for custom TLD The mdns_minimal module handles queries for the .local TLD only. Note the [NOTFOUND=return], which specifies that if mdns_minimal cannot find *.local, it will not continue to search for it in dns, myhostname, etc. https://www.ncsc.gov.ie/emailsfrom/Shadowserver/DoS/mDNS/ DNS listens on port 53/UDP while mDNS listens on port 5353/UDP. DNS primarily uses point-to-point (unicast) communication with each DNS query sent to a specific IP address while mDNS uses point-to-multipoint (multicast) communication with the mDNS query sent to each devices on the local area network with the reserved mDNS multicast IPv4 address of 224.0.0.251. George.
