Zonealarm on windows 2000 pro client

I have a workstation with zonealarm installed. Workstation uses the internet via lan modem. Network is win2000. I am receiving the following internet alerts from zonealarm. Please tell me what each means and if I should answer yes or no to access internet/server. Thank you.

1. Do you want to allow LSA executable and server dll [export version] to access the local area network. LSASS.EXE
2. CBA – PING DISCOVERY, PDS.EXE