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ConceptMulticast DNS / 多播DNS

mDNS

Multicast DNS, a protocol that allows local network devices to announce and discover services via multicast addresses without a central DNS server. It is the underlying protocol of Bonjour.

Timeline (last 90 days)

Oct 14

mDNS is the protocol behind Bonjour, allowing LAN devices without relying on a central DNS server to announce and discover their services via the multicast address 224.0.0.251 (IPv4) or ff02::fb (IPv6).

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Oct 14

Exo uses mDNS to broadcast hostname, IP and port under the service type _exo._tcp.local, letting nodes automatically form a peer-to-peer mesh network.

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Oct 14

Across subnets or on Wi-Fi with AP isolation enabled, multicast is often blocked, and Exo needs to switch to an explicit address list or ensure the network supports multicast.

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Sep 13

AppleTalk emphasizes a zero-configuration philosophy where devices joining a network can automatically negotiate addresses, an idea that influenced the later Bonjour/mDNS.

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Sep 9

Network discovery protocols UPnP and mDNS were originally designed for automatic device discovery and interconnection, but can also be used to collect device fingerprint information.

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Sep 9

Smart TVs scan home network devices via network discovery protocols such as UPnP, mDNS, and SSDP, and can collect information including device type, manufacturer, MAC address, and operating system version.

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All Facts (6)

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