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NEW QUESTION # 451
A few employees report issues with sessions disconnecting frequently, buffering repeatedly, and performing poorly. Given the following information:
* Employees are in a multitenant office building.
* The Wi-Fi uses 2.4GHz.
* Wireless signals from users range between -50 to -65dBm.
* WPA2 is used.
Which of the following is the most likely cause of the issues?
Answer: A
Explanation:
The correct answer is A. Channel overlap . The signal strength numbers given, -50 to -65 dBm , are generally strong enough for normal client connectivity, so this does not point to weak coverage. The bigger clue is that the environment is a multitenant office building and the wireless network is using 2.4 GHz .
That band is well known for congestion and overlapping channels, especially where many nearby businesses or tenants have their own access points.
In the 2.4 GHz range, there are only a few non-overlapping channels commonly used. When many APs operate close together on overlapping channels, clients can experience interference, retransmissions, poor throughput, buffering, and connection instability. Those symptoms fit the scenario very well.
The other options are less convincing. Insufficient wireless coverage does not line up with the reported signal levels. AP antenna type could matter in some designs, but there is nothing in the question pointing to a directional or placement issue. WPA2 is not the cause of the performance symptoms here; while it is older than WPA3, it does not normally create repeated buffering and disconnections in this way.
This is really a wireless interference question, and in a crowded 2.4 GHz building, channel overlap is the most likely reason.
NEW QUESTION # 452
A network administrator needs to create a way to redirect a network resource that has been on the local network but is now hosted as a SaaS solution. Which of the following records should be used to accomplish the task?
Answer: D
Explanation:
To redirect a network resource that has moved from a local network to a Software-as-a-Service (SaaS) solution, the network administrator needs to configure a DNS record that maps an alias to the new canonical name (hostname) of the SaaS provider's server. The CNAME (Canonical Name) record is used to alias one domain name to another, effectively redirecting requests to the new hostname without needing to update the IP address directly. This is ideal for SaaS solutions, where the provider's server hostname is used, and the IP address may change dynamically.
Why not TXT? A TXT record is used to store arbitrary text data, such as SPF records for email authentication or verification strings, not for redirecting resources.
Why not AAA? There is no such thing as an "AAA" record in DNS. This might be a typo for AAAA (IPv6 address record), but AAAA maps a hostname to an IPv6 address, not an alias.
Why not PTR? A PTR record is used for reverse DNS lookups (mapping an IP address to a hostname), not for redirecting a resource to a new hostname.
Reference:CompTIA Network+ N10-009 Objective 1.5: Compare and contrast common network services and ports. The CNAME record is discussed under DNS configuration in the CompTIA Network+ Certification Study Guide (e.g., Mike Meyers' CompTIA Network+ Guide, Chapter 7: TCP/IP Applications). The guide explains that CNAME records are used to create aliases for hostnames, particularly useful for redirecting services to external providers like SaaS solutions.
NEW QUESTION # 453
Which of the following is a cost-effective advantage of a split-tunnel VPN?
Answer: C
Explanation:
A split-tunnel VPN allows some traffic to be routed through the VPN while other traffic goes directly to the internet. This setup offers several advantages, with a primary one being cost-effectiveness due to cloud-based traffic not consuming company bandwidth.
* Bandwidth Utilization: Split-tunnel VPNs reduce the amount of traffic passing through the company's network, freeing up bandwidth for other uses.
* Performance: By allowing internet-bound traffic to bypass the VPN, it can reduce latency and improve the performance for users accessing cloud services directly.
* Cost Savings: Reduced load on the company's VPN infrastructure can lead to lower costs in terms of both hardware and bandwidth.
Network References:
* CompTIA Network+ N10-007 Official Certification Guide: Covers VPN types, including split-tunnel configurations and their advantages.
* Cisco Networking Academy: Discusses VPN technologies and the benefits of split-tunneling.
* Network+ Certification All-in-One Exam Guide: Provides detailed information on VPN setups, including the cost-effectiveness of split-tunnel VPNs.
By allowing cloud-based traffic to flow outside the company's network, a split-tunnel VPN optimizes resource usage and enhances the overall network performance without incurring extra costs for bandwidth.
NEW QUESTION # 454
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 # 455
A network administrator wants to increase network security by preventing client devices from communicating directly with each other on the same subnet. Which of the following technologies should be implemented?
Answer: C
Explanation:
Private VLANs (PVLANs) are used to segment devices on the same subnet and switch so they cannot communicate with each other, while still accessing a shared resource like a router or gateway. This is often used in shared hosting or DMZ environments.
NEW QUESTION # 456
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