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  1. Junior Member
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    Jun 2015
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    #1

    Default WAN questions for ICDN 2

    Hey guys, I'm currently studying for my CCNA and I don't fully comprehending the WAN section. I'm currently using CCNA Routing and Switching 200-125 Official Cert Guide by Wendell Odom. I'll like to provide a brief overview of my understandings and will appreciate any feedback to fill in the gaps I'm missing.

    HDLC/PPP are layer 2 protocols and are only used with Leased Lines.
    - Are Leased Lines still popular in today? I tried a internet search for service providers but it did not yield any results in my area.

    eBPG - Is a layer 3 routing protocol between Customer/ISPs with different ASN.

    MetroE and MPLS are Private WAN services provided by a service provider.
    - What physical media is used with MPLS (Ethernet?)?

    GRE and PPPoe uses tunnels with encryption technology to keep the traffic secure over the Public WAN services.

    Thanks!
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  3. Went to the dark side.... Moderator networker050184's Avatar
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    #2
    Pretty much everything these days is going to be handed off via ethernet to the customer whether it's internet or MPLS. You'll still see some T1 stuff around using PPP, but not many people still buying that at this point.
    An expert is a man who has made all the mistakes which can be made.
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  4. Junior Member
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    #3
    GRE tunnels doesn't provide security as far as I know.
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  5. Senior Member Magic Johnson's Avatar
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    #4
    Where are you based? 'Leased Lines' in the UK commonly refer to private leased fibre connections and are therefore very, very popular.
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