Networks, Cables, OSI, and TCP Models
CSMA/CD, Switching, and VLANs
Trunking, DTP, and Inter-VLAN Routing
Router and Switch Security
Network Address Translation
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Now is as good a time as any to discuss Cisco Discovery Protocol. CDP is a hot exam topic because it provides a means to discover information about network devices before any configuration has been applied. This is a very useful troubleshooting tool; however, it also presents a security risk.