EtherTalk, Apple’s implementation of the 10 megabit per second (Mbps) Ethernet architecture. Two versions of EtherTalk exist. The earlier one, EtherTalk Phase 1, is modelled on the Blue Book Ethernet 2.0 (as opposed to the version specified in the IEEE 802.3 documentation). Its successor, Phase 2, is modelled on the IEEE 802.3 standard. Because these two variants of Ethernet define packets somewhat differently, Phase 1 and Phase 2 nodes cannot communicate directly with each other. EtherTalk has replaced LocalTalk as the default networking capability in newer Macintosh models.