silly newbie question

[Y Ahn]

Hi all,

I am trying to learn how DNS works in the Net.  For the sake of argument,
let's suppose there is a LAN connected to the Net through an ISP.  The LAN
has (1) a Web server that serves up html pages to the general public on the
Net and (2) PCs that access the Net with Web browsers.  Now my questions: Do
I need two different DNS servers for (1) and (2)?  Or can I use just one DNS
server for both purposes?

Thanx in advance,
Ahn