response 13 of 13:

Jan 9 03:04 UTC 2007

Re resp:9: If you're only carrying IP, and only between two hosts, SLIP 
is indeed simpler.  (In fact, it's about as simple as it could possibly 
get.)  It gets messy in a hurry if you have to support multiple peers, 
though, because it has no support for things like automatically 
assigning IP addresses.