General OSPF

Question 1

Does OSPF support Equal-cost load balancing?

Answer 1

Yes.

However it does not support unequal cost load balancing and EIGRP should be used instead if you want to use unequal cost load balancing.

Question 2

what are the OSPF neighbor states?

Answer 2

Down
init
2-way
exstart
exchange
loading
full

Question 3

do OSPF process IDs have to match?

Answer 3

No.

Question 4

Should OSPF router IDs match?

Answer 4

No. (Should be unique)