 Each must forward traffic unrelated to its own use, and therefore be a router.The primary challenge in building a MANET is equipping each device to continuously maintain the information required to properly route traffic.This becomes harder as the scale of the MANET increases due to 1) the desire to route packets to/through every other node, 2) the percentage of overhead traffic needed to maintain real-time routing status, 3) each node has its own goodput to route independent and unaware of others needs, and 4) all must share limited communication bandwidth, such as a slice of radio spectrum.