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Information Security #3 - 2004

Information Security #3 - 2004

, , Cisco Systems

, .

, .

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, Ethernet-, , , (). . Ethernet.

-, . , . , . .

1. , , - . , - 5 . - , , . , , , , , , . .

2. , MAC- , , "". , , . , .

, , Port Security. , , -, "" . . MAC- .

ARP

ARP IP- MAC-. ARP .

1. ARP ARP- , . ARP " ". . , . ARP-, , IP- MAC- . ARP-, , IP- , Ethernet- , MAC- . , , IP-.

2. " ". ARP-, IP- MAC-.

3. ARP- , , " " ARP- . , , .

ARP- , Cisco Catalyst. ARP- DHCP (Dynamic ARP Inspection - DAI). IP- MAC-, DHCP. IP- MAC-, .

DHCP

DHCP TCP/IP . , , , . DHCP .

1. , , DHCP DHCP- DHCP- . DHCP- , " ". DHCP- , .

2. " " DHCP-. IP-, MAC- , DHCP-.

DHCP DHCP- DHCP Snooping, Cisco Catalyst. , DHCP- DHCP- (DHCP Relay). DHCP-, . , DHCP Snooping DHCP-, MAC- , MAC- Ethernet.

, DHCP, ARP- Dynamic ARP Inspection, IP- IP Source Guard.

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, . , , .

"Cisco SAFE: Security Architecture for Enterpise". " ", .

, , Cisco Catalyst . Port Security, BPDU Guard, Dynamic ARP Inspection, DHCP Snooping, IP Source Guard Control Plane Policing. , .




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