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Modern ISP Services and Demarcation Points Quiz

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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?

Application Layer (C) Signup and view all the answers

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

Adding specific information to user data at each layer (C) 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?

Data Link Layer (D) Signup and view all the answers

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

Serve primarily as transit providers (B) Signup and view all the answers

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

Internet Content Providers (D) Signup and view all the answers

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

Allow Internet traffic exchange between ISPs (C) Signup and view all the answers

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

Point of Presence (D) Signup and view all the answers

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

Tier 3 Service Providers (D) Signup and view all the answers

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

Purchase transit services from Tier 1 service providers (C) Signup and view all the answers

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

To provide a clear separation between the customer network and service provider network (C) Signup and view all the answers

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

Customer edge device (B) Signup and view all the answers

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

Provide access to the service provider network over a link to provider routers (D) Signup and view all the answers

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

In the service provider core network (D) Signup and view all the answers

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

To act as an entry point into the service provider's network (B) Signup and view all the answers