Internet Connect During Remaster

Is it mandatory to connect to the internet during remaster? What is the purpose of the connection?

I just want to remove applications during remaster so why to connect to the net?

Of course it isn't mandatory, but if you want to update some programs from net you have to do it.

I can do the updating later when I am successful with my very first remaster.
The remaster itself is a bit daunting for a beginner like me so why complicate it with an internet update?
I wanted my own smaller knoppix,perhaps with only kde.(tried morphix but modem does not work,knoppixkde is ok but I am getting this file system read only error while accessing partitions.Besides it is outdated).