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Question 363 - CS0-003 discussion

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After an upgrade to a new EDR, a security analyst received reports that several endpoints were not communicating with the SaaS provider to receive critical threat signatures. To comply with the incident response playbook, the security analyst was required to validate connectivity to ensure communications. The security analyst ran a command that provided the following output:

ComputerName: comptia007

RemotePort: 443

InterfaceAlias: Ethernet 3

TcpTestSucceeded: False

Which of the following did the analyst use to ensure connectivity?

A.

nmap

Answers
A.

nmap

B.

tnc

Answers
B.

tnc

C.

ping

Answers
C.

ping

D.

tracert

Answers
D.

tracert

Suggested answer: B

Explanation:

Comprehensive Detailed

The command output shown indicates that the analyst used a TCP connection test to check if communication on port 443 (usually HTTPS) succeeded. Here's why each option was or was not suitable:

A . nmap: While nmap can scan ports, it does not provide direct feedback on connection success or failure in the manner shown.

B . tnc (Test-NetConnection in PowerShell): This command in PowerShell is specifically designed to test connectivity to a specified port and IP address. The output (TcpTestSucceeded: False) is characteristic of the tnc command.

C . ping: The ping command only tests ICMP echo replies and does not indicate success or failure on specific ports.

D . tracert: tracert traces the path packets take to reach a host but does not provide a direct indication of port availability or success.

Microsoft PowerShell Documentation: Test-NetConnection cmdlet, which details TCP port testing.

NIST SP 800-115: Technical Guide to Information Security Testing and Assessment, covering connectivity testing methods.

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asked 15/11/2024
Martine Cornax
34 questions
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