question about routing and ip addressing

Hello everyone, I have some questions about routing:
1. can i run different type of routing daemons simultaneously on one physical interface? does it have any practical meaning? and how do i mix the routes getting from different routing protocol together, is there any metric/distance transform i should do? (if possible,please refer to the corresponding rfc)

2. i know we can bind serval ip addresses to a single physical
interface and that is called alias,but can we bind severval physical
interface to one ip address ? and what is the practical meaning
of alias and severval physical interface with one ip address?
(if possible, please refer to the corresponding rfc)

3. which rfc documents the route redistribute discipline?

4. i don't have router in hand, just one PC, how can i test the
correctness of my implementation of the routing protocol?

Huu.....
Waiting for your kindness help.

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