1. Page 401: 3, 16, 21, 22, 23, 25, 26, 27
2. page 405, 7, 21 (make sure to show every step as done in class), 22 a, 24, 26, 27
3. Why does link-state routing only use links that are announced by both ends of the link?
4. Give an example where distance vector routing results in "count-to-infinity," and show how poisoned reverse fixes the problem.