Describe TCP and IP$.$ How did we get from ARPAnet to the modern Internet? Why is the switch from IPv$4$ to IPv$6$ so difficult? $(2$ points$).$

How can the Internet consist of networks of such physically different transmission media$$cable$,$ fiber, and wireless and yet, work seamlessly as one network? $(1$ points$)$

Last$-$mile providers often advertise very fast speeds, but users rarely see speeds as high as advertised rates. We see both fiber optic and $5$G services for the home in the SF Bay Area. Which would you choose and why? $(2$ point$)$