An explanation, s'il vous plaitFollow

I've been away for a while.

A very long while. Like over a year. As I've said before, I just recently came back to FFXI because I finally have time enough to play. As I'm going along and leveling, I'm starting to get the feel of it again. But there's a lot of stuff that I've missed. Almost none of the people I had played with are online anymore, so I don't have any experienced friends to ask for directions. I need some things explained to me, cause I'm still a noob at this game it seems.

I know kind of get what Dynamis is, but what are things like Assault, Sea, Sky, Nyzul, and Salvage?

How does Besieged work?

What's the difference between KSNM, ZNM, ENM, and BCNM?

What are the different types of PvP?

And lastly, what are the level requirements for all of these?

Yes, it's a lot, and I don't expect any one person to answer all of this. I've only been back for a week and I'm enjoying it, but when someone says "<any above item> is really awesome when you get to it," I dunno what it is. Thanks in advance tho. Feel free to add to the list, if there's something I should know about that I didn't mention. Any help is welcome.

Thanks Matt :D

I don't know how I never had the idea to search for a FFXI database, haha. Looks like I'll be spending a lot of time on ffxiclopedia. It's unfortunate that people don't do much PvP on Diabolos, it seems like it would be interesting.

So many things to do in this game.. Seems a bit overwhelming XD

That's good to hear. Does anyone do CoP anymore, or rank missions? It seems like the older quests can be hard to get a group for as well, like Eco-Warrior and other events that require a large group.