Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 634
What is the result of the ACME-Router(config)#login block-for 100 attempts 4 within 60 command on a Cisco IOS router?
Answer options
- A. If four failures occur in 60 seconds, the router goes to quiet mode for 100 seconds
- B. After four unsuccessful log in attempts the line is blocked for 100 seconds and only permit IP addresses are permitted in ACL 60
- C. After four unsuccessful log in attempts the line is blocked for 60 seconds and only permit IP addresses are permitted in ACL 100
- D. If four log in attempts fail in 100 seconds, wait for 60 seconds to next log in prompt
Correct answer: A
Explanation
The correct answer, A, accurately describes that if there are four failed login attempts within a 60-second window, the router will enter quiet mode for 100 seconds. Option B is incorrect because it misstates the duration of the block as 100 seconds instead of the correct 60 seconds. Option C incorrectly mentions that the block duration is 60 seconds and misattributes the ACL number. Option D misrepresents the timing and does not align with the command's function.