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Exam 200-301 topic 1 question 609 discussion

Actual exam question from Cisco's 200-301
Question #: 609
Topic #: 1
[All 200-301 Questions]

Refer to the exhibit. Which two statements about the interface that generated the output are true? (Choose two.)

  • A. learned MAC addresses are deleted after five minutes of inactivity
  • B. the interface is error-disabled if packets arrive from a new unknown source address
  • C. it has dynamically learned two secure MAC addresses
  • D. it has dynamically learned three secure MAC addresses
  • E. the security violation counter increments if packets arrive from a new unknown source address
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Suggested Answer: AC 🗳️

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Chupacabro
Highly Voted 3 years, 4 months ago
B - wrong. only shuts int when violation mode is "shutdown" D - wrong. dynamically learned only 2 MACADD using sticky command E - wrong. only increments on "restrict" and "shutdown" violation mode Answer - A, C
upvoted 12 times
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Joshua25
Most Recent 6 months, 2 weeks ago
Selected Answer: C
Only C is correct. A is wrong, because STICKY is enabled. Dynamically learned addresses are added to running-config, and remain in the mac table. They do not age out. This is tested on a Cisco switch. I disconnected the devices, waited for 10 minutes, and then checked learned addresses. The dynamically learned addresses are still there.
upvoted 1 times
MinSun600
3 months ago
could be true but the A is the most close to right as the rest are not except C
upvoted 1 times
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[Removed]
1 year, 1 month ago
Selected Answer: AC
A & C are correct
upvoted 1 times
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Sal34
2 years, 11 months ago
Selected Answer: AC
The answer is 100% a and c
upvoted 2 times
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Hodicek
3 years, 5 months ago
aging time is 5 minutes sticky is automatically 2 MACs
upvoted 3 times
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Hodicek
3 years, 5 months ago
B-D-E ARE INCORRECT ANSWERS FOR SURE
upvoted 2 times
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sp123
3 years, 7 months ago
There really isn't a good second answer here. Technically sticky mac addresses are considered static. That being said, I guess the provided answers are the best choices anyways. From the Official Cert Guide: Example 6-4 proves the point. It shows two commands about interface F0/2 from the port security example shown in Figure 6-2 and Example 6-1. In that example, port security was configured on F0/2 with sticky learning, so from a literal sense, the switch learned a MAC address off that port (0200.2222.2222). However, the show mac address-table dynamic command does not list the address and port because IOS considers that MAC table entry to be a static entry. The show mac address-table secure command does list the address and port.
upvoted 2 times
dave1992
3 years, 6 months ago
You’re misunderstanding the text. Sticky mac learning works by DYNAMICALLY learning the MAC address traffic is received on the port, the book is saying that the show MAC address table dynamic command doesn’t list it because it’s configured on port security. The MAC address can be seen if you type in the “show MAC address table secure command” Sticky MAC addresses NOT static. They ARE dynamic.
upvoted 4 times
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syanev
3 years, 9 months ago
I have a question - does the statically configured mac address also diappear after 5 mins of inactivity or just the two dynamically learned?
upvoted 2 times
DaBest
3 years, 7 months ago
it dose only if you use the STATIC commend like this: "switchport port-security aging static time 5 type inactivity"
upvoted 1 times
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Sicko
4 years ago
https://community.cisco.com/t5/switching/what-exactly-does-mac-address-sticky-do/td-p/857804 Given Answers are correct. Sticky MAC ADRESS means that when you reload the Switch the Switch stills save the mac address that was learned DYNAMICALLY.
upvoted 2 times
CiscoTerminator
3 years, 9 months ago
that is not TRUE entirely - if you don't copy run start after the switch has learnt the MACs, and reboot the switch - it will not save them and wont be available after reload.
upvoted 4 times
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Kareemelkh
4 years, 2 months ago
C state that it learned two MACs dynamically . Output showed Sticky MAC addresses : 2
upvoted 3 times
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ttomer
4 years, 2 months ago
How did it learned DYNAMICALLY? 2 Sticky MACs and 1 configured... Therefore I conclude they weren't dynamically learned, am I wrong?
upvoted 2 times
imo90s
4 years ago
1) Configured means the 1 mac address that was statically configured 2) Sticky means the 2 dynamically learnt
upvoted 11 times
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A (35%)
C (25%)
B (20%)
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