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| Section | Objectives |
|---|---|
| Networking Concepts | - Ports, protocols, and services - IPv4 and IPv6 addressing - Network topologies and types (LAN, WAN, WLAN) - OSI model and TCP/IP model |
| Network Operations | - Monitoring and optimization - Network documentation and diagrams - Business continuity and disaster recovery |
| Network Troubleshooting | - Troubleshooting methodology - Common network issues - Tools and diagnostic techniques |
| Network Implementation | - Switching technologies - Wireless networking - Network storage and virtualization - Routing technologies |
| Network Security | - Network hardening techniques - Access control and authentication - Security concepts and threats |
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NEW QUESTION # 562
Which of the following is considered a valid second factor for multi-factor authentication (MFA)?
Answer: D
Explanation:
Multi-factor authentication (MFA) requires two or more different categories of authentication factors:
* Something you know (password, PIN)
* Something you have (smart card, hardware token)
* Something you are (biometric)
The only valid second factor here is a hard token (e.g., a key fob generating one-time codes).
* A. PIN is still "something you know," the same category as a password.
* B. Favorite color is a weak knowledge-based factor, not a true second factor.
* D. Mother's maiden name is also "something you know" and insecure.
References (CompTIA Network+ N10-009):
* Domain: Network Security - Authentication methods, MFA factor categories.
NEW QUESTION # 563
What environmental factor is critical to monitor when switches are installed in sealed enclosures to prevent overheating?
Answer: B
Explanation:
Switches in sealed enclosures are at risk of overheating because airflow is restricted. The temperature factor is critical since heat buildup can damage components, shorten device lifespan, and cause outages. Proper cooling or ventilation must be ensured.
* A. Fire suppression is important for data centers but not the primary concern in a sealed box.
* B. Power budget applies to PoE allocations, not environmental safety.
* D. Humidity matters, but overheating is far more immediate in sealed environments.
References (CompTIA Network+ N10-009):
* Domain: Network Infrastructure - Environmental considerations, switch installation, temperature control.
NEW QUESTION # 564
A technician needs to identify a computer on the network that is reportedly downloading unauthorized content. Which of the following should the technician use?
Answer: C
Explanation:
Packet Capture: This method captures and inspects network traffic to identify unauthorized downloads or malicious behavior. It provides detailed insight into the data being transmitted, making it the best tool for this scenario.
Anomaly alerts (A): Alerts may indicate unusual activity but do not provide detailed traffic analysis.
Port mirroring (B): Port mirroring can redirect traffic for analysis but requires a packet capture tool for deeper inspection.
Performance monitoring (C): Focuses on system performance metrics, not detailed traffic content.
Reference: CompTIA Network+ Official Study Guide, Domain 4.3 (Network Monitoring Tools).
NEW QUESTION # 565
A network administrator is troubleshooting a connectivity issue between two devices on two different subnets.
The administrator verifies that both devices can successfully ping other devices on the same subnet. Which of the following is the most likely cause of the connectivity issue?
Answer: C
Explanation:
When two devices on different subnets are unable to communicate, but can communicate with other devices on their own subnet, the issue is most often related torouting. Devices on different subnets require adefault gatewayto route traffic between networks.
* If thedefault gateway is incorrectly configured, the device won't know how to reach other subnets.
* Faulty cables (Option B) or duplex mismatches (Option C) would likely cause connectivity issues even within the local subnet, which is not the case here.
* VLAN mismatches (Option D) are typically issues with switch port configurations and would likely cause total loss of connectivity, including within the same subnet.
#So, the most probable andlogical causeis anincorrect default gateway.
NEW QUESTION # 566
After a security incident, a technician reveals that company data was stolen. During the investigation, it is discovered that a host disguised itself as a switch. Which of the following best describes the attack that occurred?
Answer: B
Explanation:
VLAN hopping occurs when an attacker tricks a switch into believing the host is another switch by generating tagged frames or exploiting trunk negotiation (DTP). This allows the attacker to access traffic from multiple VLANs, potentially stealing sensitive data.
B). Evil twin is a rogue wireless AP attack, unrelated to switch impersonation.
C). DNS poisoning corrupts name resolution, not VLAN access.
D). ARP spoofing is a Layer 2 on-path attack, not masquerading as a switch.
References (CompTIA Network+ N10-009):
Domain: Network Security - VLAN hopping attacks, switch spoofing techniques.
NEW QUESTION # 567
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