Exam 300-115 topic 5 question 209 discussion

Actual exam question from Cisco's 300-115

Question #: 209
Topic #: 5

[All 300-115 Questions]

In which two circumstances does a port security violation occur? (Choose two.)

A. when sticky MAC address learning is enabled and the port has a link-down condition
B. when a port with a secure MAC address attempts to use a different port in the same VLAN
C. when the same MAC addresses enters a port more than once
D. when the CAM table overflows with dynamically learned MAC addresses
E. when the port has received more MAC addresses than allowed

Show Suggested Answer

Suggested Answer: BE 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/port_sec.pdf

by Bastex at Nov. 20, 2019, 7:59 a.m.

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Bastex

5 years, 7 months ago

But another Cisco document has nuance: "If a secure MAC address is secured on a port, that MAC address is not allowed to enter on any other port off that VLAN. If it does, the packet is dropped unnoticed in the hardware. Other than through the interface or port counters, you do not receive a log message reflecting this fact. Be aware that this condition does not trigger a violation. Dropping these packets in the hardware is more efficient and can be done without putting additional load on the CPU." https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/31sg/configuration/guide/conf/port_sec.pdf

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