, , IT- . Private Virtual Local Area Network, PVLAN, .
PVLAN
, PVLAN . , . Host-, PVLAN, . . , , .

, ACL (Access Control List), . . , "".
?
, PVLAN:
- "Promiscuous" - . , , PVLAN.
- "Isolated" - . 2 ( Layer 2 , VLAN), , promiscuous. , PVLAN. , - .
- "Community" - . , host- , .
2 VLAN:
- (Primary) - . , ( - ).
- (Secondary) - VLAN, .
, , , . - PVLAN Nexus Catalyst Cisco ( , 3560).
PVLAN?
VLAN ( - QinQ), , , , .
, PVLAN:
- . , . VLAN , , . , , .
- . , , . IT- , . VLAN . .