Modern ISP Services and Demarcation Points Quiz
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Questions and Answers

What is responsible for adding a header at each layer as a packet of information travels through in data encapsulation?

  • Application Encapsulation
  • Transport Encapsulation
  • Network Interface Encapsulation
  • IP Encapsulation (correct)

    • Which TCP/IP layer is often referred to as Layer 3 and is responsible for end-to-end forwarding of datagrams?

  • Data Link Layer
  • Transport Layer
  • Application Layer
  • Network Layer (correct)

    • What is the main purpose of the User Interface to the Network in the TCP/IP layers?

  • Unique network addressing scheme
  • End-to-end frame transfer
  • User applications like E-mail and FTP (correct)
  • Physical transfer of data

    • Which layer of the TCP/IP model provides an application interface to the IP layer and deals with reliable/unreliable transfers?

    <p>Application Layer</p> Signup and view all the answers

    In the context of TCP/IP, what does data encapsulation refer to?

    <p>Adding specific information to user data at each layer</p> Signup and view all the answers

    Which TCP/IP layer is responsible for the physical transfer of data and is often referred to as Layer 2?

    <p>Data Link Layer</p> Signup and view all the answers

    What is the main role of Tier 1 Service Providers in the Internet hierarchy?

    <p>Serve primarily as transit providers</p> Signup and view all the answers

    Which type of organizations create or distribute content for the Internet?

    <p>Internet Content Providers</p> Signup and view all the answers

    What is the function of an Internet Exchange Point (IXP)?

    <p>Allow Internet traffic exchange between ISPs</p> Signup and view all the answers

    In the context of Internet terminology, what does POP stand for?

    <p>Point of Presence</p> Signup and view all the answers

    Which tier of service providers resell services for various Tier 2 service providers to their customers?

    <p>Tier 3 Service Providers</p> Signup and view all the answers

    What characterizes the main function of Tier 2 Service Providers in the Internet hierarchy?

    <p>Purchase transit services from Tier 1 service providers</p> Signup and view all the answers

    What is the purpose of a Demarcation Point in ISP services?

    <p>To provide a clear separation between the customer network and service provider network</p> Signup and view all the answers

    Which network component typically resides on the customer premises in ISP services?

    <p>Customer edge device</p> Signup and view all the answers

    What is the main function of a Provider Edge (PE) device in ISP services?

    <p>Provide access to the service provider network over a link to provider routers</p> Signup and view all the answers

    Where are Provider (P) routers typically located in ISP networks?

    <p>In the service provider core network</p> Signup and view all the answers

    What is the key role of a Point of Presence (POP) in ISP services?

    <p>To act as an entry point into the service provider's network</p> Signup and view all the answers

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