when was it introduced ?
Ethernet was developed between 1973 and 1974
Ethernet
Ethernet was developed at Xerox PARC between 1973 and 1974
where does the pfe reside on an mx960 router UNANSWERABLE what is juniper mx-series? It is a family of ethernet routers and switches what is the meaning of the initial word? Ethernet is a family of computer networking technologies commonly used in local area networks (LAN),  and wide area networks (WAN) when was it standardized? In February 1980
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Ethernet [SEP] History
Ethernet was developed at Xerox PARC between 1973 and 1974. It was inspired by ALOHAnet, which Robert Metcalfe had studied as part of his PhD dissertation. The idea was first documented in a memo that Metcalfe wrote on May 22, 1973, where he named it after the luminiferous aether once postulated to exist as an "omnipresent, completely-passive medium for the propagation of electromagnetic waves." In 1975, Xerox filed a patent application listing Metcalfe, David Boggs, Chuck Thacker, and Butler Lampson as inventors. In 1976, after the system was deployed at PARC, Metcalfe and Boggs published a seminal paper. Yogen Dalal, Ron Crane, Bob Garner, and Roy Ogus facilitated the upgrade from the original 2.94 Mbit/s protocol to the 10 Mbit/s protocol, which was released to the market in 1980.