probe for unspecified port

["Gisle Vanem" <giva () bgnett no>]

Why is this command
  nmap.exe -v -sS -p21 -O pcgv2

sending a ping and probes to port 80 and 21?
I didn't specify port 80. What did I miss?

Starting nmap 3.50 ( http://www.insecure.org/nmap ) at 2004-03-06 18:49 GMT
Host pcgv2 (10.0.0.3) appears to be up ... good.
Initiating SYN Stealth Scan against pcgv2 (10.0.0.3) at 18:49
Adding open port 21/tcp

(Win-XP, WinPcap 3.1)

--gv


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