0. Logistics
   --> Please start assignment 1 (20 so far).
   --> Will add notes on propagation, transmission delay, capacity, etc.
   --> Will start with the transport layer today.
   --> Identify yourself somewhere in the repo.

1. The rules of the reliability game
   --> Arbitrary loss, reordering, or duplication
   --> No partition
   --> Preserve packet order (instead of byte order) for simplicity.

2. Stop And Wait
   --> Sender
   --> Receiver
   --> Throughput of Stop And Wait; hint towards sliding window

3. Retransmission timers
   --> Mean, variance, and tail probability
   --> Online estimation of mean and variance
   --> Lost retransmissions and exponential backoff