17 Questions
What is responsible for adding a header at each layer as a packet of information travels through in data encapsulation?
IP Encapsulation
Which TCP/IP layer is often referred to as Layer 3 and is responsible for end-to-end forwarding of datagrams?
Network Layer
What is the main purpose of the User Interface to the Network in the TCP/IP layers?
User applications like E-mail and FTP
Which layer of the TCP/IP model provides an application interface to the IP layer and deals with reliable/unreliable transfers?
Application Layer
In the context of TCP/IP, what does data encapsulation refer to?
Adding specific information to user data at each layer
Which TCP/IP layer is responsible for the physical transfer of data and is often referred to as Layer 2?
Data Link Layer
What is the main role of Tier 1 Service Providers in the Internet hierarchy?
Serve primarily as transit providers
Which type of organizations create or distribute content for the Internet?
Internet Content Providers
What is the function of an Internet Exchange Point (IXP)?
Allow Internet traffic exchange between ISPs
In the context of Internet terminology, what does POP stand for?
Point of Presence
Which tier of service providers resell services for various Tier 2 service providers to their customers?
Tier 3 Service Providers
What characterizes the main function of Tier 2 Service Providers in the Internet hierarchy?
Purchase transit services from Tier 1 service providers
What is the purpose of a Demarcation Point in ISP services?
To provide a clear separation between the customer network and service provider network
Which network component typically resides on the customer premises in ISP services?
Customer edge device
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
Where are Provider (P) routers typically located in ISP networks?
In the service provider core network
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
Test your knowledge on modern ISP services, demarcation points, service level agreements, and customer edge devices. Learn about the variety of services provided by ISPs to residential and enterprise customers.
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