what are the current products of the aforesaid mx-series?
A virtualized MX series 3D router, the vMX 3D
Juniper MX-Series
A virtualized MX series 3D router, the vMX 3D, was introduced in November 2014. 
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 when was it introduced ? Ethernet was developed between 1973 and 1974 who developed it? It was inspired by ALOHAnet what is its frame structure? The "frame" begins after the start frame delimiter with a frame header featuring source and destination MAC addresses and the EtherType field giving either the protocol type for the payload protocol or the length of the payload are there various varieties? Yes,such as  10BASE-T, 100BASE-TX, and 1000BASE-T what can you tell me about its evolution? Ethernet has evolved to include higher bandwidth, improved medium access control methods, and different physical media
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Juniper MX-Series [SEP] Recent developments
A suite of updates were announced in late 2015. New MPC line cards were introduced, which have a throughput of up to 1.6 Tbit/s. Simultaneously the Juniper Extension Toolkit (JET) was announced. JET is a programming interface for integrating third-party applications that automate provisioning, maintenance and other tasks. The Junos Telemetry Interface was also announced at the same time. It reports data to applications and other equipment to automate changes to the network in response to faults or in order optimize performance.