Understanding MetroEthernet

If I understand companies that have multiple branches geographically spread over different areas can subscribe to a WAN service provider that will enable the branches to communicate with each other as if they were in one Network location.

Well from the Client Edge to Provider Edge I have heard of metroethernet , does that mean it is like connecting Cat5 or cat6 cable between CE and PE ?

if so, we still can use the term of MetroEthernet regardless of what technology the WAN provider is using inside the WAN ?
I initially thought there is a WAN technology call Metroethernet ,just like Frame-Relay and MPLS.

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First, just call it a MAN.  Cabling can be optical or copper.   MPLS is a type of MAN that uses ethernet (on your side) over MPLS over ethernet (at your service provider).   Your frame relay analogy is pretty good, yes, think of it as a dying method for accomplishing the same thing back in the age of dinosaurs ;)

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jskfanAuthor Commented:
So there is no WAN cloud called Metroethernet.
It is just the connection between CE and PE that is called Metroethernet

The only WAN clouds I have heard of are Frame Relay and MPLS
"Metroethernet" is not a trademarked term, so it does not make sense that a vendor would call their service "Metroethernet".  However, that doesn't mean a marketeer or misinformed salesperson won't try to give the impression that they are the only provider of "metroethernet".

Look, you're reading too much into this.  A MAN is the generic term for a metroethernet. Multiple vendors offer this type of a WAN (which is a MAN) that links your ethernet-based network with services at their ethernet-based network which is called  MAN because of the metroethernet endpoints.  MPLS is ONE means to providing the glue in the middle.  If the glue was something else frame relay you would say you have a WAN.
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Ethernet is cheap on customer, you dont know what sits at provider's end.
Frame Relay is almost non-existant nowadays.
jskfanAuthor Commented:
Thank you Guys!
by the way is Metroethernet faster than T1 or T3 line ?
Is Metroethernet faster than T1 or T3 line ?
Speed is a function of what you pay for.  It could be faster or slower.
What is faster? You can label 40GBit connection "Virtual DSL" and tell DSL is faster than optical internet...
jskfanAuthor Commented:
Thank you Guys!
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