$.$ Ports: Read about ports in the weekly reading assignment $($repeated from HW$6)$

a$.$ Why does the Transport Layer use ports?

b$.$ How many bits are allocated for ports?

c$.$ What are the port number ranges for:

i$.$ well$-$known ports

ii$.$ registered ports

iii. dynamic $($ephemeral$)$ ports

d$.$ Find an application that you use and list the port number that its server uses: e$.$ What is the purpose of the dynamic ports?