Amazon Recommended Product "dns" Zeroconf Book Google Adsense Apple's Instant Messaging client, iChat , includes support for direct peer-to-peer chatting without communicating via a server, using an XMPP-like communication protocol . This mode, called "Bonjour Chat" in iChat, uses DNS-SD to discover peers with which to populate the Bonjour buddy list. This means that, unlike a conventional buddy list which you manage yourself, the Bonjour window gives you an automatically-created buddy list which can loosely be described as something like "people near me". By default, iChat specifies a domain of "local" when browsing for peers, which means it only finds peers on the local link which can be discovered using link-local Multicast DNS . However, Wide-Area DNS-SD makes it is possible also to discover services beyond the local link using the same DNS-SD APIs. To have iChat ...