A.PAT技術(shù) B.isl C.trunk D.stp
A.1到99 B.1到199 C.1到299 D.1到399
A.10.0.0.0--10.255.255.255 B.172.16.0.0-172.31.255.255 C.192.168.0.0-192.168.255.255 D.100.0.0.0-100.255.255.255