It appears that the local network connection (ethernet, Wi-Fi, etc.) is working but the gateway to the WAN is down.
Answer:
Overall, the main difference between the courses is the fact that AP classes require an AP exam, while Dual Enrollment classes just require a passing grade. This causes colleges to favor AP classes because they know exactly what you learned based on what you knew on the AP exam.
It really depends on the type of app. There are lots of free pieces of software but distribution is expensive.
Android - $20 one time fee
IOS - $99 per year
I believe the answer is Binary form.
Computers process 1's and 0's (binary)