A.1-126/8 B.128-191/16 C.192-223/24 D.172.16.0.0-172.31.255.255
A.130 B.110 C.210 D.150
A.trunk允許除vlan10以外的其他vlan通過 B.trunk允許vlan10通過 C.vlan10只能從這個(gè)trunk通過 D.vlan10為默認(rèn)vlan