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Exam 100-105 All Questions

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Exam 100-105 topic 1 question 50 discussion

Actual exam question from Cisco's 100-105
Question #: 50
Topic #: 1
[All 100-105 Questions]

Refer to the exhibit.

If CDP is enabled on all devices and interfaces, which devices will appear in the output of a show cdp neighbors command issued from R2?

  • A. R1, S1, S2, R3 and S3
  • B. R2 and R3
  • C. R3 and S2
  • D. R1 and R3
  • E. R1, S1, S2, and R3
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Suggested Answer: C 🗳️
A Cisco device enabled with CDP sends out periodic interface updates to a multicast address in order to make itself known to neighbors. Since it is a layer two protocol, these packets are not routed. So the devices detected would be immediate connected neighbors.
by YR at Sept. 10, 2019, 9:31 a.m.

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YR
5 years, 9 months ago
show cdp neighbors Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone Device ID Local Intrfce Holdtme Capability Platform Port ID SW2 Fas 0/0 142 S 2960 Fas 0/1 R1 Fas 0/1 142 R C1841 Fas 0/1 R3 Ser 0/0/0 143 R C1841 Ser 0/0/0 Similar to the options in this question. So it's R3 and S2. It only shows directly connected devices as CDP works at Layer 2
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