Cisco Ethernet switch Manuale Utente Pagina 4

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© 2002, Cisco Systems, Inc. All rights reserved.
l2-security-bh.ppt
Host B
Why Worry about Layer 2 Security?
Host A
Physical Links
Physical Links
MAC Addresses
MAC Addresses
IP Addresses
IP Addresses
Protocols/Ports
Protocols/Ports
Application Stream
Application Stream
OSI Was Built to Allow Different Layers to Work without Knowledge of Each Other
Application
Application
Presentation
Presentation
Session
Session
Transport
Transport
Network
Network
Data Link
Data Link
Physical
Physical
Application
Application
Presentation
Presentation
Session
Session
Transport
Transport
Network
Network
Data Link
Data Link
Physical
Physical
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