Computer Networks - Internet Architecture & Application Layer Please answer the question Someone suggested to use a local file called hosts.txt on each machine instead of DNS. Discuss the advantages...

Computer Networks - Internet Architecture & Application Layer

Please answer the question

Someone suggested to use a local file called
hosts.txt
on each machine instead of DNS. Discuss the advantages (at least 2) and disadvantages (at least 2) of such suggestion. What is ‘saw-tooth’ behavior in TCP, and what is causing it?