Mechanisms for a multi-homed host to pick the best router

[LarrySheldon at cox.net (Laurence F. Sheldon, Jr.)]

Cayle Spandon wrote:

> I have a server which is multi-homed to N routers as shown below:
> 
>      +---+
> R1---|   |
>      |   |
> R2---|   |
> ...  | S |
>      |   |
> Rn---|   |
>      +---+
> 
> This server is a host; it is not a router in the sense that it will never
> forward any packets (but it might run routing protocols as discussed below).

This is going to be the stupid question of the day, but unless you have 
a route policy (in which case, what was the question again?) why would 
you not sent the reply out the same spigot you go the request on?