The OSI reference model consists of seven layers, three of which exist above the transport layer,...

   

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The OSI reference model consists of seven layers, three of which exist above the transport layer, whereas in TCP/IP all of the functionality of these three layers is delegated in a policy-free manner to a single layer, namely the application layer. You will recall that each layer exists to address a specific part of the problem of transferring data from one application to another on the network. In 2012 Google introduced QUIC, a protocol that would improve performance for web traffic. After some revisions the IETF has adopted it in a draft form as a proposed standard. QUIC follows a policy-free approach its functionality is implemented within the application layer, yet it is solving a problem that is really the job of the transport layer. a) [4 marks-1 page] In what ways does QUIC improve the performance of web traffic? b) [4 marks-1 page] What is it that QUIC does that leads to these improvements? c) If QUIC were to be implemented within the transport layer rather the application layer i) [4 marks-1 page] what benefits would this bring? ii) [4 marks-1 page] what would be the negative impacts? iii) [4 marks - -1 pagel given your responses above, why do you think the choice was made to implement QUIC in the application layer? The OSI reference model consists of seven layers, three of which exist above the transport layer, whereas in TCP/IP all of the functionality of these three layers is delegated in a policy-free manner to a single layer, namely the application layer. You will recall that each layer exists to address a specific part of the problem of transferring data from one application to another on the network. In 2012 Google introduced QUIC, a protocol that would improve performance for web traffic. After some revisions the IETF has adopted it in a draft form as a proposed standard. QUIC follows a policy-free approach its functionality is implemented within the application layer, yet it is solving a problem that is really the job of the transport layer. a) [4 marks-1 page] In what ways does QUIC improve the performance of web traffic? b) [4 marks-1 page] What is it that QUIC does that leads to these improvements? c) If QUIC were to be implemented within the transport layer rather the application layer i) [4 marks-1 page] what benefits would this bring? ii) [4 marks-1 page] what would be the negative impacts? iii) [4 marks - -1 pagel given your responses above, why do you think the choice was made to implement QUIC in the application layer?