Cisco CCNA Service Provider Question of the Week

CCNASPofw01At what layer does IP protocol run in the legacy TCP/IP model?

    1. Transport
    2. Network
    3. Internet
    4. Session
    5. Application

The correct answer is 3.

The older TCP/IP model has 4 layers, network access, internet, transport and application. Internet layer is equivalent to the OSI model network layer.

Related Courses:
SPNGN1 – Building Cisco Service Provider Next-Generation Networks, Part 1
SPNGN2 – Building Cisco Service Provider Next-Generation Networks, Part 2

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2 comments

  1. Mike Gibson Reply

    The correct answer is not internet it is Network. The reason is because the TCP/IP model has changed.

    Application
    Transport
    Network
    DataLink
    Physical

    In which Application matches to Application,Presentation,and Session of the OSI model.

  2. Johnny Bass Reply

    That is true, but the question asks about the “legacy TCP/IP model”, which is referred to as Internet, not network. Within the CCNA SP (and CCNA R&S) there is a contrast of the legacy versus the OSI model, which redefines the layers. The OSI model redefines layer 3 to be Network.