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NEW QUESTION # 206
After installing a series of Cat 8 keystones, a data center architect notices higher than normal interference during tests. Which of the following steps should the architect take to troubleshoot the issue?
- A. Use passthrough modular crimping plugs instead of traditional crimping plugs.
- B. Run a speed test on a device that can only achieve 100Mbps speeds.
- C. Connect the RX/TX wires to different pins.
- D. Check to see if the end connections were wrapped in copper tape before terminating.
Answer: D
Explanation:
* Importance of Proper Termination:
* Cat 8 cabling requires precise termination practices to ensure signal integrity and reduce interference. One common requirement is to wrap the end connections in copper tape to maintain shielding and reduce electromagnetic interference (EMI).
* Interference Troubleshooting:
* Interference in high-frequency cables like Cat 8 can be caused by improper shielding or grounding. Checking the end connections for proper wrapping in copper tape is a crucial step.
* Why Other Options are Less Likely:
* Passthrough modular crimping plugs: Not specifically related to interference issues and are typically used for ease of cable assembly.
* Connecting RX/TX wires to different pins: Would likely result in no connection or incorrect data transmission rather than interference.
* Running a speed test on a device that can only achieve 100Mbps speeds: This would not diagnose interference and would not provide relevant information for Cat 8 cabling rated for
* higher speeds.
* Corrective Actions:
* Verify that all end connections are properly wrapped with copper tape before termination.
* Ensure that the shielding is continuous and properly grounded throughout the installation.
* Retest the cabling for interference after making corrections.
References:
* CompTIA Network+ study materials and structured cabling installation guides.
NEW QUESTION # 207
A user reports having intermittent connectivity issues to the company network. The network configuration for the user reveals the following:
IP address: 192.168.1.10
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254
The network switch shows the following ARP table:
Which of the following is the most likely cause of the user's connection issues?
- A. A port with incorrect VLAN assigned
- B. Another PC with manually configured IP
- C. A switch with spanning tree conflict
- D. A router with overlapping route tables
Answer: B
Explanation:
This scenario describes a duplicate IP address. The ARP table shows two different MAC addresses (0c00.
1134.0001 and 0c00.1298.d239) associated with the same IP address (192.168.1.10), which leads to ARP table conflicts and intermittent connectivity.
From Andrew Ramdayal's guide:
"Duplicate IP addresses occur when two devices on the same network are assigned the same IP address, causing network conflicts. Common issues include manual configuration errors or DHCP lease issues.
Resolution includes using IP management tools and avoiding overlaps in DHCP and static IP assignments."
NEW QUESTION # 208
A network administrator needs to deploy a subnet using an IP address range that can support at least
260 devices with the fewest wasted addresses. Which of the following subnets should the administrator use?
- A. 172.33.0.0/21
- B. 172.25.2.0/23
- C. 172.30.1.0/22
- D. 172.16.0.0/24
Answer: B
Explanation:
To support at least260 hosts, you need at least512 total IP addresses (accounting for network/broadcast overhead).
* /23 (255.255.254.0)gives510 usable IPs, ideal for 260 devices with minimal waste.
* /24 (255.255.255.0)gives only 254 usable - not enough.
* /22 (1022 usable)and/21 (2046 usable)would work but result insignificant address waste.
#Reference:
CompTIA Network+ N10-009 Official Objectives: 2.1 - Given a scenario, configure and apply IP addressing schemes.
NEW QUESTION # 209
Which of the following focuses on application delivery?
- A. IaaS
- B. DaaS
- C. SaaS
- D. PaaS
Answer: C
Explanation:
Platform as a Service (PaaS) focuses on application delivery. It provides a platform for developers to build, deploy, and manage their applications without having to worry about the underlying infrastructure. PaaS providers typically offer a variety of services, such as:
Operating system
Programming languages
Databases
Web servers
Application servers
Storage
Networking
Load balancing
Monitoring
PaaS can be a good option for businesses that want to develop and deploy applications quickly and easily, without having to worry about the underlying infrastructure.
NEW QUESTION # 210
Two companies successfully merged. Following the merger, a network administrator identified a connection bottleneck. The newly formed company plans to acquire a high-end 40GB switch and redesign the network from a three-tier model to a collapsed core. Which of the following should the administrator do until the new devices are acquired?
- A. Install a load balancer.
- B. Configure a route selection metric change.
- C. Enable link aggregation.
- D. Implement the FHRP.
Answer: C
Explanation:
*The issue described is a network bottleneck due to increased traffic after a merger.
*A collapsed core architecture consolidates the core and distribution layers into a single layer to improve efficiency and reduce latency.
*Until the 40GB switch is acquired, Link Aggregation (LAG) (IEEE 802.3ad / LACP) can be used to combine multiple physical links into a single logical link, increasing bandwidth and reducing bottlenecks.
*FHRP (First Hop Redundancy Protocol) (A) is used for gateway redundancy, not link aggregation.
*Route selection metric changes (B) help with routing decisions but don't address physical link congestion.
*Load balancers (C) distribute traffic for applications, not network links.
#Reference: CompTIA Network+ N10-009 Official Documentation - Network Architecture and Performance Optimization.
NEW QUESTION # 211
A network technician is troubleshooting network latency and has determined the issue to be occuring two network switches( Switch10 and Switch11). Symptoms reported included poor video performance and slow file copying. Given the following informtion:
Which of the following should the technician most likely do to resolve the issue?
- A. Disable automatic negotiation on Switch11.
- B. Modify Switch10 MTU value to 1500.
- C. Change the native VLAN on the ports.
- D. Configure STP on both switches.
Answer: B
NEW QUESTION # 212
Which of the following devices can operate in multiple layers of the OSI model?
- A. Switch
- B. Modem
- C. Transceiver
- D. Hub
Answer: A
Explanation:
* Understanding Switches:
* Layer 2 (Data Link Layer): Traditional switches operate primarily at Layer 2, where they use MAC addresses to forward frames within a local network.
* Layer 3 (Network Layer): Layer 3 switches, also known as multilayer switches, can perform routing functions using IP addresses to forward packets between different networks.
* Capabilities of Multilayer Switches:
* VLANs and Inter-VLAN Routing: Multilayer switches can handle VLAN (Virtual Local Area Network) configurations and perform inter-VLAN routing, enabling communication between different VLANs.
* Routing Protocols: They can run routing protocols like OSPF (Open Shortest Path First) and EIGRP (Enhanced Interior Gateway Routing Protocol) to manage traffic between networks.
* Comparison with Other Devices:
* Hub: Operates only at Layer 1 (Physical Layer) and simply repeats incoming signals to all ports.
* Transceiver: Also operates at Layer 1, converting electrical signals to optical signals and vice versa.
* Modem: Primarily operates at Layer 1 and Layer 2, modulating and demodulating signals for transmission over different types of media.
* Practical Application:
* Multilayer switches are commonly used in enterprise networks to optimize performance and manage complex routing and switching requirements within a single device.
References:
* CompTIA Network+ study materials on network devices and the OSI model.
NEW QUESTION # 213
A network administrator wants to implement an authentication process for temporary access to an organization's network. Which of the following technologies would facilitate this process?
- A. Enterprise authentication
- B. Captive portal
- C. WPA3
- D. Ad hoc network
Answer: B
Explanation:
A captive portal is a technology that facilitates the authentication process for temporary access to a network. It is commonly used in public Wi-Fi hotspots, hotels, airports, and other environments where temporary network access is provided. When users connect to the network, they are redirected to a captive portal page where they must authenticate or agree to terms and conditions before gaining access to the internet or other network resources.
NEW QUESTION # 214
A network architect of a stock exchange broker is implementing a disaster recovery (DR), high-availability plan. Which of the following approaches would be the best fit?
- A. Warm site
- B. Full mesh
- C. Active-active
- D. In-band
Answer: C
Explanation:
The correct answer is Active-active because a stock exchange broker requires extremely high availability, minimal downtime, and near-zero data loss. According to CompTIA Network+ (N10-009) objectives under high availability and disaster recovery concepts, an active-active configuration involves multiple systems or sites operating simultaneously and sharing the workload. If one system fails, the other continues processing traffic without service interruption.
This model provides the lowest Recovery Time Objective (RTO) and Recovery Point Objective (RPO), which is critical in financial trading environments where even seconds of downtime can result in major financial loss. Active-active architectures also support load balancing, redundancy, and continuous synchronization between systems.
A warm site (Option A) contains preconfigured hardware but may require data restoration and configuration before becoming fully operational, resulting in some downtime. A full mesh (Option C) is a network topology design and does not specifically address disaster recovery at the service level. In-band (Option D) refers to management traffic sharing the production network and is unrelated to DR strategy.
Therefore, an active-active approach is the most suitable solution for mission-critical financial operations.
NEW QUESTION # 215
Which of the following internal routing protocols is best characterized as having fast convergence and being loop-free?
- A. STP
- B. RIP
- C. OSPF
- D. BGP
Answer: C
Explanation:
The correct answer is OSPF (Open Shortest Path First). OSPF is a link-state routing protocol known for its fast convergence and use of the Dijkstra algorithm to calculate the shortest loop-free path. It efficiently scales to large enterprise networks and avoids routing loops by maintaining a complete topology map.
A . BGP is primarily an external routing protocol used between ISPs, not internal.
B . STP is not a routing protocol; it prevents loops at Layer 2.
D . RIP is an older distance-vector protocol with slower convergence and a maximum hop limit of 15.
OSPF's design makes it the preferred internal gateway protocol (IGP) for medium-to-large organizations requiring speed and loop-free reliability.
NEW QUESTION # 216
Which of the following attacks would most likely cause duplicate IP addresses in a network?
- A. Social engineering
- B. Denial-of-service
- C. Rogue DHCP server
- D. DNS poisoning
Answer: C
Explanation:
^p
Explanation:
Definition of a Rogue DHCP Server:
A rogue DHCP server is an unauthorized DHCP server on a network, which can assign IP addresses to devices without proper control, leading to IP address conflicts.
Impact of a Rogue DHCP Server:
IP Address Conflicts: Multiple devices may receive the same IP address from different DHCP servers, causing network connectivity issues.
Network Disruption: Devices may be assigned incorrect network configuration settings, disrupting network services and connectivity.
Comparison with Other Attacks:
DNS poisoning: Alters DNS records to redirect traffic to malicious sites, but does not cause IP address conflicts.
Social engineering: Involves manipulating individuals to gain unauthorized access or information, not directly related to IP address conflicts.
Denial-of-service (DoS): Floods a network or service with excessive traffic to disrupt operations, but does not cause duplicate IP addresses.
Prevention and Detection:
Implement network access control measures to prevent unauthorized devices from acting as DHCP servers.
Use DHCP snooping on switches to allow DHCP responses only from authorized DHCP servers.
Reference:
CompTIA Network+ study materials on network security threats and mitigation techniques.
NEW QUESTION # 217
A user notifies a network administrator about losing access to a remote file server. The network administrator is able to ping the server and verifies the current firewall rules do not block access to the network fileshare. Which of the following tools wold help identify which ports are open on the remote file server?
- A. Tracert
- B. nslookup
- C. Nmap
- D. Dig
Answer: C
Explanation:
Nmap (Network Mapper) is a powerful network scanning tool used to discover hosts and services on a computer network. It can be used to identify which ports are open on a remote server, which can help diagnose access issues to services like a remote file server.
Port Scanning: Nmap can perform comprehensive port scans to determine which ports are open and what services are running on those ports.
Network Discovery: It provides detailed information about the host's operating system, service versions, and network configuration.
Security Audits: Besides troubleshooting, Nmap is also used for security auditing and identifying potential vulnerabilities.
NEW QUESTION # 218
Network administrators are using the Telnet protocol to administer network devices that are on the 192.168.1.0/24 subnet. Which of the following tools should the administrator use to best identify the devices?
- A. telnet
- B. nmap
- C. tracert
- D. dig
Answer: B
Explanation:
nmap (Network Mapper) is the best tool in this scenario. It can scan the 192.168.1.0/24 subnet to discover live hosts, open ports (like Telnet on port 23), and device types. It's ideal for mapping and auditing the network.
A . dig is a DNS lookup tool; not useful for identifying hosts on a subnet.
C . tracert shows the path packets take to a destination, not for host discovery.
D . telnet is the protocol being used, not a tool for scanning or identifying devices.
Reference:
CompTIA Network+ N10-009 Official Objectives: 5.1 - Given a scenario, use the appropriate network troubleshooting tools.
NEW QUESTION # 219
What is the most likely cause of a workstation being able to access the internet and printers, but not internal servers?
- A. Incorrect default gateway
- B. Error-disabled port
- C. Duplicate IP address
- D. Wrong VLAN assignment
Answer: D
Explanation:
If a workstation can access the internet and printers (likely in another VLAN) but not internal servers, the port was likely placed into the wrong VLAN after the move. VLAN assignment controls Layer 2 segmentation, restricting access to resources on different VLANs.
* A. A wrong default gateway would prevent internet access.
* C. An error-disabled port would block all connectivity.
* D. A duplicate IP would cause general network issues, not just missing server access.
References (CompTIA Network+ N10-009):
* Domain: Network Troubleshooting - VLAN misconfiguration, connectivity issues.
NEW QUESTION # 220
A technician is troubleshooting a computer issue for a user who works in a new annex of an office building.
The user is reporting slow speeds and intermittent connectivity. The computer is connected via a Cat 6 cable to a distribution switch that is 492ft (150m) away. Which of the following should the technician implement to correct the issue?
- A. Increase the bandwidth allocation to the computer.
- B. Enable the computer to support jumbo frames.
- C. Run a Cat 7 cable from the computer to the distribution switch.
- D. Install an access switch in the annex and run fiber to the distribution switch.
Answer: D
Explanation:
The maximum recommended length for Ethernet cable runs is 100 meters (328 feet). At 150 meters, the Cat 6 cable is too long, causing signal degradation and connectivity issues. Running fiber from the distribution switch to an access switch in the annex will allow for reliable connectivity over longer distances, as fiber can cover greater distances without signal loss. (Reference: CompTIA Network+ Study Guide, Chapter on Network Cable Standards)
NEW QUESTION # 221
What type of filtering can block access to websites based on their domain or country code TLDs (e.g., .cn, .ru)?
- A. MAC filtering
- B. Content filtering
- C. URL filtering
- D. DNS poisoning
Answer: C
Explanation:
URL filtering can block access to websites based on their domain or country code TLDs (e.g., .cn, .ru). This is the correct method to block by location identifiers in URLs.
* B. Content filtering blocks based on keywords or categories within websites, not country code.
* C. DNS poisoning is an attack, not a control mechanism.
* D. MAC filtering restricts devices, not websites.
References (CompTIA Network+ N10-009):
* Domain: Network Security - Filtering technologies, URL vs content filtering.
NEW QUESTION # 222
A data center administrator is evaluating the use of jumbo frames within a storage environment. Which of the following describes the best reason to use jumbo frames in the storage environment?
- A. To report on the current root switch in the STP
- B. To increase drive throughput
- C. To improve routing convergence
- D. To reduce device overhead
Answer: D
Explanation:
Jumbo frames are Ethernet frames with a payload greater than the standard 1,500 bytes. Using jumbo frames reduces the number of frames transmitted over the network, thereby reducing the overhead associated with frame headers and processing. The document explains:
"Jumbo frames are used in storage networks to reduce device overhead by lowering the number of frames required for data transfer, which can increase overall throughput and performance."
NEW QUESTION # 223
A network administrator deployedwireless networkingin the office area. When users visit theoutdoor patio and try todownload emails with large attachments or stream training videos, they noticebuffering issues.
Which of the following is themost likely cause?
- A. Client disassociation
- B. Signal degradation
- C. Wireless interference
- D. Network congestion
Answer: B
Explanation:
Comprehensive and Detailed Explanation:
The mostlikely causeof buffering issues when moving outdoors issignal degradation. Wireless signals weaken as they travel through obstacles such as walls, glass, and air, leading toweaker connections and reduced data rates.
Breakdown of Options:
* A. Network congestion- While congestion can slow down network speeds, itaffects all users, not just those moving outdoors.
* B. Wireless interference- Interference is possible but ismore likely caused by other wireless signals rather than outdoor movement.
* C. Signal degradation-Correct answer.Wireless signals weaken withdistance and obstaclessuch as walls, reducing performance.
* D. Client disassociation- Disassociation occurs when clientslose connection to the AP, but the question states that usersexperience buffering, indicating they are still connected but with a weak signal.
NEW QUESTION # 224
A company is opening a new site that needs to be divided into subnets that accommodate 75 hosts each.
Which of the following is the most efficient subnet?
- A. 192.168.13.0/25
- B. 192.168.13.0/28
- C. 192.168.13.0/26
- D. 192.168.13.0/27
Answer: A
Explanation:
To support 75 hosts per subnet , you must choose a subnet size that provides at least 75 usable IP addresses.
In IPv4, usable hosts per subnet equals 2^(host bits) # 2 (subtracting network and broadcast). A /25 leaves 7 host bits (32-25 = 7), giving 2^7 # 2 = 128 # 2 = 126 usable hosts , which meets the requirement and is the smallest (most efficient) option listed that does so. A /26 leaves 6 host bits, giving 62 usable hosts , which is insufficient. A /27 gives 30 usable , and a /28 gives 14 usable , both far below 75. Network+ subnetting objectives emphasize selecting the smallest subnet that satisfies the host requirement to conserve address space while meeting growth and design constraints. Therefore, 192.168.13.0/25 is the most efficient option that accommodates at least 75 hosts per subnet.
NEW QUESTION # 225
A technician needs to identify a computer on the network that is reportedly downloading unauthorized content. Which of the following should the technician use?
- A. Packet capture
- B. Port mirroring
- C. Anomaly alerts
- D. Performance monitoring
Answer: A
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:
NEW QUESTION # 226
Which of the following can support a jumbo frame?
- A. Access point
- B. Switch
- C. Bridge
- D. Hub
Answer: B
Explanation:
* Definition of Jumbo Frames:
* Jumbo frames are Ethernet frames with more than 1500 bytes of payload, typically up to 9000 bytes. They are used to improve network performance by reducing the overhead caused by smaller frames.
* Why Switches Support Jumbo Frames:
* Switches are network devices designed to manage data packets and can be configured to support jumbo frames. This capability enhances throughput and efficiency, particularly in high- performance networks and data centers.
* Incompatibility of Other Devices:
* Access Point: Primarily handles wireless communications and does not typically support jumbo frames.
* Bridge: Connects different network segments but usually operates at standard Ethernet frame sizes.
* Hub: A simple network device that transmits packets to all ports without distinguishing between devices, incapable of handling jumbo frames.
* Practical Application:
* Enabling jumbo frames on switches helps in environments where large data transfers are common, such as in storage area networks (SANs) or large-scale virtualized environments.
NEW QUESTION # 227
A network administrator configured a router interface as 10.0.0.95 255.255.255.240. The administrator discovers that the router is not routing packets to a web server with IP 10.0.0.81/28. Which of the following is the best explanation?
- A. Theweb server Is In adifferent subnet.
- B. Therouter interface isa broadcast address.
- C. TheIP address spaceis a class A network.
- D. Thesubnet is in a private address space.
Answer: B
NEW QUESTION # 228
Which of the following steps in the troubleshooting methodology comes after using a top-to-top buttom examination of the OSI model to determine cause?
- A. Establish a plan of action
- B. Verify full system functionality
- C. Test in the theory
- D. Identify the problem
Answer: A
NEW QUESTION # 229
A network technician is troubleshooting a web application's poor performance. The office has two internet links that share the traffic load. Which of the following tools should the technician use to determine which link is being used for the web application?
- A. netstat
- B. ping
- C. nslookup
- D. tracert
Answer: D
Explanation:
Understanding Tracert:
Traceroute Tool: tracert (Windows) or traceroute (Linux) is a network diagnostic tool used to trace the path that packets take from a source to a destination. It lists all the intermediate routers the packets traverse.
Determining Traffic Path:
Path Identification: By running tracert to the web application's destination IP address, the technician can identify which route the traffic is taking and thereby determine which internet link is being used.
Load Balancing Insight: If the office uses load balancing for its internet links, tracert can help verify which link is currently handling the traffic for the web application.
NEW QUESTION # 230
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