1. 1. Changing the network arrangement all over the time.
   2. Potentially frequently network partitions.
   3. Every node can be mobile.
   4. Limited power capacity.
   5. Limited wireless bandwidth.
   6. Presence of varying channel quality.
   7.  No centralized entry – Distributed.
   8. How do we support routing?
   9. How do we support channel access?
   10. How do we deal with mobility?
   11. How do we conserve power?
   12. How do we use bandwidth efficiently?