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200-201 An analyst sees these logs Practice Question

Exhibit

Refer to the exhibit.

%SEC-6-IPACCESSLOGP: list INBOUND denied tcp 10.0.0.1(12345) -> 192.168.1.1(22), 1 packet
%SEC-6-IPACCESSLOGP: list INBOUND denied tcp 10.0.0.2(54321) -> 192.168.1.1(22), 1 packet
%SEC-6-IPACCESSLOGP: list INBOUND denied tcp 10.0.0.3(11111) -> 192.168.1.1(22), 1 packet
%SEC-6-IPACCESSLOGP: list INBOUND denied tcp 10.0.0.4(22222) -> 192.168.1.1(22), 1 packet

An analyst sees these logs. What should be the immediate course of action?

⚠ Common exam trap

Cisco often tests the principle of 'verify before you act' to trap candidates who jump to reactive measures like blocking or changing ports without first confirming whether the traffic is authorized.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

Investigate whether these are legitimate SSH attempts from authorized remote administrators.

The logs show repeated SSH connection attempts from the 10.0.0.0/24 subnet. The immediate priority is to determine whether these are legitimate administrative activities or malicious brute-force attempts. Investigating first prevents unnecessary disruption to authorized remote administration, which is critical for maintaining network operations and security. Blocking or changing configurations without verification could inadvertently lock out legitimate administrators or violate change-control policies.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Investigate whether these are legitimate SSH attempts from authorized remote administrators.

    Why this is correct

    Verify before acting.

  • Change the SSH port to a non-standard port.

    Why it's wrong here

    Does not address the source.

  • Block all traffic from the 10.0.0.0/24 subnet.

    Why it's wrong here

    Could block legitimate traffic.

  • Add an ACL permit rule for SSH from these sources.

    Why it's wrong here

    May grant unauthorized access.

  • Disable SSH access to the router.

    Why it's wrong here

    Could disrupt management.

Visual reference

192.168.1.0 /24 256 addresses (254 usable) 192.168.1.0 /25 Subnet A 128 addr (126 usable) 192.168.1.128 /25 Subnet B 128 addr (126 usable) Borrowing 1 bit from host portion creates 2 subnets (/25)

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 200-201 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-201 exam.