Ch. 14 – WAN Architecture

Today in stead of simply complaining online about a problem I had that I was sweeping under the rug, I decided to take some initiative and learn. It’s important to take the reins of your future in your hands instead of blaming other people or allowing other people to blame other people. That get’s fairly embarrassing quickly and then the entire world starts to fall apart in a violent upheaval because you insist your a leader but yet don’t lead any thing. I’m just kidding it’s not really exactly that serious in most cases nor are there peoples lives on the line. Anyway, I really got to get focused more on this but somewhere between music, the gym and studying, I seem to have a lot going on. Which requires more than just chit chat about how your pants don’t match. Congratulations on all you’ve done.

Time for some questions. If I worked hard this week, I could get the book done and then start into the VCE.

Im not sure what e-tree is. Lets look that up

Carrier Ethernet Services

Cisco endorses Metro Ethernet Forum (MEF) Carrier Ethernet (CE) 2.0 services:

  • E-LINE: An E-Line is a point-to-point Ethernet service that connects exactly 2 UNIs.
  • E-LAN: An E-LAN is a multipoint-to-multipoint service that connects a number of UNIs (2 or more) providing full mesh connectivity for those sites.
  • E-TREE: An E-Tree is a rooted multipoint service that connects a number of UNIs providing sites with hub and spoke multipoint connectivity.
  • E-ACCESS: An E-Access Service is an OVC-based service with at least one UNI OVC End Point and one ENNI End Point.

What’s a Carrier Ethernet Service? Its what your ISP provides to you. Per looking at google, I think the answer is C as nothing else is mentioned

We are kind of getting into some confusing terms as B is likely but isn’t Ethernet? So I’m not sure.

Good to know!

I would say B for sure makes logical sense and probably D. It could be A but its probably easier to manage each location as its own subnet in terms of things configured on static IPs.

Honestly, I would say the same thing unless I’m missing something obvious here.

Hummm… MPLS… here is some non – technical commentary on it

This is from wikipedia and I found it much more useful information

Multiprotocol Label Switching (MPLS) is a routing technique in telecommunications networks that directs data from one node to the next based on short path labels rather than long network addresses, thus avoiding complex lookups in a routing table and speeding traffic flows.[1] The labels identify virtual links (paths) between distant nodes rather than endpoints. MPLS can encapsulate packets of various network protocols, hence the “multiprotocol” reference on its name. MPLS supports a range of access technologies, including T1/E1ATMFrame Relay, and DSL.

Now I still don’t know the answer but it appears to be D.

No idea what PE-CE is

what does pe ce mean

I know what that is but obviously this graph does not provide the answer we are seeking.

Good to know. There is no answer hahaha. Its really where ever…?

Lol, I feel like I should very strongly know this, yet my best guess is B.

Trying to get a few more of these done today and maybe finally arrange this track that I have a ton of parts recorded for. We will see how it goes!

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