Uploaded May 2017 | Updated September 2026, 1 week ago

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CompTIA Network+ Tutorial: Network+ Exam N10-006, Objective 4.7

Given a scenario, troubleshoot and resolve common security issues.
• Misconfigured firewall
• Misconfigured ACLs/applications
• Malware
• DoS
• Open/closed ports
• ICMP-related issues
- Ping of death
- Unreachable default gateway
• Unpatched firmware/OSs
• Malicious users
- Trusted
- Untrusted users
- Packet sniffing
• Authentication issues
- TACACS/RADIUS misconfigurations
- Default passwords/settings
• Improper access/backdoor access
• ARP issues
• Banner grabbing/OUI/TCP ports
• Domain/local group configurations
• Jamming