What is the difference between TCP and UDP?

Properties of TCP

Delivery is in-order
Delivery is guaranteed (the sender knows if the packets weren’t delivered)
Throttling / flow control
An A+ answer will include a brief description of the sliding window and the ACK model

Properties of UDP

“Chuck-n-duck” delivery

What the difference is between http and https?
What happens when I open my browser and browse to a remote website?