SOI QUESTION: 5.1 SA creation style: Cryptographic agreement

["Theodore Ts'o" <tytso@mit.edu>]

After taking a few days off for the July 4th holidays, I'm restarting
sending out SOI Questions.  There only a couple more for us to tackle!

Please discuss and answer this question: 

5. SA creation style

5.1 Cryptographic agreement

5.1.A)Is negotiation for the algorithm suite required or not?

5.1.B) Is there ever a case when you want the initiator to have the "last 
word"?

Implications from the scenarios:

[none]