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| Section | Weight | Objectives |
|---|---|---|
| Network Security | 14% | - Threats, vulnerabilities, and mitigation - Authentication and access control - Network hardening and secure configuration - Segmentation and traffic protection - Security concepts and frameworks |
| Network Operations | 19% | - Business continuity and disaster recovery - Network monitoring and documentation - High availability and redundancy - Performance management and optimization - Infrastructure automation basics |
| Network Implementations | 20% | - Physical network installation - Wireless standards and deployment - Network services configuration - Switching technologies and configurations - Routing concepts and protocols |
| Network Troubleshooting | 24% | - Performance and latency problems - Tools and command-line utilities - Connectivity issues - Wireless and security troubleshooting - Troubleshooting methodology |
| Networking Fundamentals | 23% | - OSI and TCP/IP models - IP addressing and subnetting - Network devices and cabling - Network topologies and types - Ports, protocols, and services |
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NEW QUESTION # 174
A network administrator is implementing dynamic routing protocols for a large enterprise network that has several vendor devices. Which of the following is the best choice for an enterprise network with multiple locations and high-bandwidth requirements?
Answer: B
Explanation:
This environment matches the strengths of OSPF: it is an open standard, works well across multivendor networks, scales efficiently across multiple enterprise locations, and handles high- bandwidth requirements with fast convergence and hierarchical design.
NEW QUESTION # 175
A network administrator performed upgrades on a server and installed a new NIC to improve performance. Following the upgrades, usera are unable to reach the server. Which of the following is the most likely reason.
Answer: A
Explanation:
When a network administrator installs a new Network Interface Card (NIC) and users are unable to reach the server, one of the common issues is the use of an incorrect cable type. Network cables must match the specifications required by the NIC and the network infrastructure (e.g., Cat5e, Cat6 for Ethernet).
NIC Compatibility: The new NIC might require a specific type of cable to function properly. Using a cable not rated for the NIC's required speeds or capabilities can result in connectivity issues.
Cable Standards: Different NICs and network devices might need different cabling standards (straight-through vs. crossover cables, or specific fiber optic types).
Connection Types: Ensuring that the cable connectors are appropriate for the NIC ports (e.g., RJ45 for Ethernet, LC connectors for fiber optics).
Network Reference:
CompTIA Network+ N10-007 Official Certification Guide: Discusses network cabling standards and NIC specifications.
Cisco Networking Academy: Provides insights into cabling and NIC configurations for optimal network performance.
Network+ Certification All-in-One Exam Guide: Offers comprehensive details on troubleshooting network connectivity issues, including cabling problems.
NEW QUESTION # 176
A Linux server is running a log collector that needs to be hardened. A network administrator executes netstat to find open ports on the server. Which of the following ports should be disabled?
Answer: C
Explanation:
Comprehensive and Detailed Explanation (aligned to N10-009):
For a log collector server, the primary needed service is Syslog, which typically uses UDP port 514. Other ports may be open for management (e.g., 22 for SSH) or SNMP traps (162) if integrated. However, port 80 (HTTP) should not be open unless required, as it increases attack surface and does not directly serve the log collection purpose. Disabling it hardens the server.
A). 22 (SSH) is needed for secure management.
C). 162 (SNMP trap) may be required for monitoring/log correlation.
D). 514 (Syslog) is essential for log collection.
References (CompTIA Network+ N10-009):
Domain: Network Security - Hardening servers, disabling unnecessary services and ports.
NEW QUESTION # 177
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: A
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 # 178
SIMULATION
After a recent power outage, users are reporting performance issues accessing the application servers. Wireless users are also reporting intermittent Internet issues.
INSTRUCTIONS
Click on each tab at the top of the screen. Select a widget to view information, then use the drop-down menus to answer the associated questions. If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
See the answer and solution below
Explanation:
Network Health:
WAN 2 appears to have a lower average latency and loss percentage, which would make it the preferred WAN station for VoIP traffic. VoIP traffic requires low latency and packet loss to ensure good voice quality and reliability. WAN 1 seems to have higher RAM and processor usage, which could also affect the performance of VoIP traffic.
Here's the summary of the key metrics for WAN 1 and WAN 2 from the image provided:
WAN 1:
Uplink Speed: 10G
Total Usage: 26.969GB Up / 1.748GB Down
Average Throughput: 353MBps Up / 23.42MBps Down
Loss: 2.51%
Average Latency: 24ms
Jitter: 9.5ms
WAN 2:
Uplink Speed: 1G
Total Usage: 930GB Up / 138GB Down
Average Throughput: 12.21MBps Up / 1.82MBps Down
Loss: 0.01%
Average Latency: 11ms
Jitter: 3.9ms
For VoIP traffic, low latency and jitter are particularly important to ensure voice quality. While WAN 1 has higher bandwidth and throughput, it also has higher latency and jitter compared to WAN 2. However, WAN 2 has much lower loss, lower latency, and lower jitter, which are more favorable for VoIP traffic that is sensitive to delays and variation in packet arrival times.
Given this information, WAN 2 would generally be preferred for VoIP traffic due to its lower latency, lower jitter, and significantly lower loss percentage, despite its lower bandwidth compared to WAN 1. The high bandwidth of WAN 1 may be more suitable for other types of traffic that are less sensitive to latency and jitter, such as bulk data transfers.
Device Monitoring:
the device that is experiencing connectivity issues is the APP Server or Router 1, which has a status of Down. This means that the server is not responding to network requests or sending any dat a. You may want to check the physical connection, power supply, and configuration of the APP Server to troubleshoot the problem.
NEW QUESTION # 179
......
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