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Figure 6-7 shown a CDP Collecting Information Process

                        You use the show cdp neighbors command to display information about the networks
                directly connected to the router. CDP provides information about each CDP neighbor device by
                transmitting  Type  Length  Values  (TLVs).  TLVs  are  blocks  of  information  embedded  in  CDP
                advertisements. Device TLVs displayed by the show cdp neighbors command, and as shown in
                the following example, include the following:
                           •  Device ID


                           •  Local Interface

                           •  Hold time

                           •  Capability

                           •  Platform

                           •  Port ID

                           •  VTP Management Domain Name (CDPv2 only)

                           •  Native VLAN (CDPv2 only)


                           •  Full/Half-Duplex (CDPv2 only)
                        6.5 Routed Protocols Versus Routing Protocols

                        Because of the similarity of the two terms, confusion often exists regarding the routed
                protocol and the routing protocol, see Figure 6-8 shown a Routed and Routing Protocols.

                        The following provides some clarification:








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