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| Section | Weight | Objectives |
|---|---|---|
| Security Operations | 34% | - Tools for Determining Malicious Activity
|
| Reporting and Communication | 16% | - Security Operations and Incident Response Reporting and Communication
|
| Incident Response and Management | 24% | - Incident Response Process
|
| Vulnerability Management | 26% | - Vulnerability Scanning Methods
|
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NEW QUESTION # 136
A security operations center analyst is using the command line to display specific traffic.
The analyst uses the following command:
$tshark -r file.pcap -Y "http or udp"
Which of the following will the command line display?
Answer: C
Explanation:
The -r file.pcap argument instructs TShark to read packets from the specified capture file, while -Y applies a Wireshark display filter . The expression "http or udp" therefore displays packets recognized as HTTP or packets using UDP.
Traditional HTTP traffic is unencrypted and can be dissected directly as HTTP. HTTPS normally carries HTTP inside TLS encryption and therefore is not displayed merely because the filter specifies http. DNS commonly operates over UDP, particularly for standard queries and responses, so ordinary DNS traffic satisfies the udp portion of the expression. Consequently, B is the best answer in the context of the available choices.
A technical distinction is important: the expression does not mean "HTTP or DNS specifically." The udp portion matches UDP traffic generally, which can include protocols other than DNS. Nevertheless, within the examination scenario, the intended comparison is plaintext HTTP versus encrypted HTTPS together with standard UDP-based DNS.
Wireshark's documentation distinguishes display filters from capture filters, and TShark is the command-line network traffic analyzer within the Wireshark suite. CS0-004 places packet-analysis capabilities within Security Operations.
Study Guide Reference: Security Operations # Packet Analysis # Wireshark/TShark # PCAP Analysis # Display Filters # HTTP, UDP, and DNS.
NEW QUESTION # 137
Which of the following actions should an incident response analyst take during the recovery phase of the incident response process?
Answer: A
Explanation:
Reimaging the disk is a recovery activity because it restores the compromised endpoint to a trusted operational state after malicious activity has been identified and contained. Reimaging replaces the affected operating environment with a known-good system image, removing uncertainty about hidden persistence mechanisms, modified system files, unauthorized software, or other residual effects of compromise.
Verification that malicious activity occurred belongs to the detection and analysis stage. Taking the system offline is a containment measure intended to prevent additional propagation, command-and-control communication, or damage. Writing the final report occurs during post-incident documentation and lessons- learned activities rather than operational restoration.
NIST's Recover function focuses on restoring affected assets and operations and verifying that restored systems are suitable for return to normal business use. A clean reimage is particularly appropriate where the integrity of the compromised operating system cannot be reliably established through selective malware removal.
After rebuilding, analysts should verify configuration, patch levels, security controls, credentials, and monitoring before reconnecting the machine to production.
Study Guide Reference: Incident Response and Management # Recovery # Reimaging # Known-Good Baselines # Restoration Validation # Return to Production.
NEW QUESTION # 138
A security architect works with a client on security operations center (SOC) capabilities. The security architect wants to ensure the log correlation and investigation activities are accurate across the infrastructure.
Which of the following is the best for the client to implement?
Answer: A
Explanation:
Accurate time synchronization is essential for reliable log correlation, making Network Time Protocol the best answer. Security investigations routinely combine events from endpoints, servers, authentication infrastructure, firewalls, cloud services, intrusion-detection systems, and other platforms. If those systems maintain inconsistent clocks, the apparent order of events may be incorrect, making it difficult to reconstruct an attack timeline or correlate activity across multiple sources.
NTP is specifically designed to synchronize computer clocks across distributed systems. RFC 5905 defines NTPv4 as a protocol used to synchronize clocks across internet-connected systems. Synchronized timestamps enable the SOC to determine whether events occurring on separate systems actually belong to the same sequence-for example, authentication followed by process execution, lateral movement, and a subsequent network connection.
ZTNA controls access according to Zero Trust principles but does not synchronize timestamps. Account federation addresses identity interoperability. SASE combines network and security services for distributed environments. APIs can integrate tools and exchange information, but integrated data remains difficult to correlate accurately if each system's timestamps are inconsistent.
For forensic and operational analysis, a consistent time reference is therefore foundational to timeline reconstruction, event sequencing, SIEM correlation, and evidentiary accuracy .
Study Guide Reference: Security Operations # Logging and Monitoring # Time Synchronization # NTP # SIEM Correlation # Timeline Analysis.
NEW QUESTION # 139
An analyst needs to perform a baseline security evaluation of the company's cloud infrastructure.
Which of the following tools is most appropriate for this task?
Answer: D
Explanation:
ScoutSuite is a cloud security auditing tool that evaluates cloud configurations and identifies security risks across cloud environments. OpenVAS scans vulnerabilities, Nikto scans web servers, and Metasploit is primarily used for exploitation testing.
NEW QUESTION # 140
Customers are unable to upload files to an SFTP server. Firewall logs show the following activity sourced from multiple IP addresses in one geographic region:
The analyst reviewing the logs notices that the session_end_reason does not change for any of the log entries. Which of the following is the next step the analyst should take to determine what is occurring?
Answer: A
Explanation:
The firewall log shows TCP traffic to port 22 is being allowed, but the sessions consistently end with an "aged-out/incomplete" status. This commonly indicates that the TCP three-way handshake is not completing. Capturing packets to determine whether the server is responding properly and whether clients are completing the handshake is the appropriate next step to identify where the connection process is failing.
NEW QUESTION # 141
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