#selfDoubt

Question

True or False:

The application layer (layer 7) is responsible for all the services that the internet will provide.

(if it is not the application layer then which layer?)

Comments

If all the services can be provides by only one layer then why we use different layers? 🤔

---

I believe it wants to ask:- using which layer do the applications access the INTERNET SERVICES eg. you are on the wikipedia page and you enter some topic in the search box of the wikipedia. As soon as you hit enter It will send the HTTPS request to the server(ignore the DNS request-response overhead). This request is one of the internet services provided by the application layer.

Other layers do provide services to their upper layers but they are not the “INTERNET” services.

Correct me if you find anything wrong

---

False.

The Application Layer  is responsible for providing network services directly to end-users or applications. It is not responsible for all the services that the internet provides. The services provided by the internet involve multiple layers of the OSI (Open Systems Interconnection) model.

The correct statement would be that the internet's services are a result of the collaboration of multiple OSI layers. For example:

• The Transport Layer (Layer 4) handles end-to-end communication and ensures data integrity.
• The Network Layer (Layer 3) is responsible for routing and forwarding data packets between devices across different networks.
• The Data Link Layer (Layer 2) deals with the framing of data for transmission over the physical medium.
• The Physical Layer (Layer 1) involves the actual hardware and transmission of raw binary data over the physical medium.

 

        while the Application Layer plays a crucial role, the internet's services are a combination of functionalities provided by multiple layers of the OSI model.