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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Operations | 19% | - Infrastructure automation basics - Business continuity and disaster recovery - Network monitoring and documentation - Performance management and optimization - High availability and redundancy |
| Topic 2: Network Security | 14% | - Security concepts and frameworks - Threats, vulnerabilities, and mitigation - Authentication and access control - Segmentation and traffic protection - Network hardening and secure configuration |
| Topic 3: Network Implementations | 20% | - Routing concepts and protocols - Wireless standards and deployment - Network services configuration - Physical network installation - Switching technologies and configurations |
| Topic 4: Networking Fundamentals | 23% | - OSI and TCP/IP models - Ports, protocols, and services - Network topologies and types - IP addressing and subnetting - Network devices and cabling |
| Topic 5: Network Troubleshooting | 24% | - Troubleshooting methodology - Performance and latency problems - Wireless and security troubleshooting - Connectivity issues - Tools and command-line utilities |
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NEW QUESTION # 346
Which of the following technologies most likely increases the potential for packet loss due to timeout?
Answer: D
Explanation:
A load balancer is the best answer because it sits in the traffic path and distributes client requests across multiple backend servers. Since a load balancer tracks sessions, health checks, connection states, and response timers, incorrect timeout values or overloaded backend systems can cause client sessions to expire before the server responds. When that happens, packets or connections may be dropped, reset, or redirected, creating symptoms that appear as packet loss or failed application communication.
The CompTIA Network+ N10-009 objectives include availability concepts, load balancing, traffic management, and network performance troubleshooting. Load balancers are useful for improving scalability and fault tolerance, but they also introduce another decision point in the traffic path. If persistence, health checks, or timeout settings are misconfigured, application traffic can be interrupted.
An IDS is usually passive and monitors copied traffic, so it is less likely to directly cause packet loss. A CDN generally reduces latency and improves delivery by serving content closer to users. QoS is designed to prioritize important traffic and reduce delay, jitter, and packet loss for sensitive applications such as VoIP.
Therefore, the most likely technology to increase packet loss due to timeout is a load balancer.
NEW QUESTION # 347
A network administrator is creating a copy of network traffic for later analysis. The flow of traffic should not be changed. Which of the following will most directly accomplish this task?
Answer: A
Explanation:
A network tap creates an exact copy of network traffic for analysis without altering the original traffic flow.
NEW QUESTION # 348
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?
Answer: A
Explanation:
Understanding Subnetting:
The subnet mask 255.255.255.240 (or /28) indicates that each subnet has 16 IP addresses (14 usable addresses, 1 network address, and 1 broadcast address).
Calculating the Subnet Range:
Subnet Calculation: For the IP address 10.0.0.95 with a /28 subnet mask:
Network address: 10.0.0.80
Usable IP range: 10.0.0.81 to 10.0.0.94
Broadcast address: 10.0.0.95
Router Interface Configuration:
Broadcast Address Issue: The IP address 10.0.0.95 is the broadcast address for the subnet 10.0.0.80/28. Configuring a router interface with the broadcast address will cause routing issues as it is not a valid host address.
Comparison with Other Options:
The web server is in a different subnet: The web server (10.0.0.81) is within the same subnet range (10.0.0.80/28).
The IP address space is a class A network: While 10.0.0.0 is a Class A network, this does not explain the routing issue caused by the broadcast address.
The subnet is in a private address space: The private address space designation (RFC 1918) does not impact the routing issue related to the broadcast address configuration.
Resolution:
Reconfigure the router interface with a valid host IP address within the usable range, such as 10.0.0.94.
Reference:
CompTIA Network+ study materials on subnetting and IP address configuration.
NEW QUESTION # 349
A user cannot access an external server for a client after connecting to a VPN. Which of the following commands would a support agent most likely use to examine the issue? (Choose two.)
Answer: A,F
Explanation:
tracert helps identify the path packets take and where they might be dropped after connecting to the VPN.
route print displays the routing table, allowing verification of how traffic is being directed when the VPN is active.
NEW QUESTION # 350
After a networking intern plugged in a switch, a significant number of users in a building lost connectivity.
Which of the following is the most likely root cause?
Answer: B
Explanation:
When a switch is improperly connected to a network, it can cause widespread connectivity issues, especially if there's a misconfiguration in VLAN settings. A Native VLAN mismatch occurs when two switches connected via a trunk link have different native VLANs configured for untagged traffic. This can cause traffic to be sent to the wrong VLAN or dropped, resulting in connectivity loss for users.
Scenario Analysis: The intern likely connected the switch without ensuring that the trunk port's native VLAN matched the existing network configuration. This is a common issue in Cisco-based networks when trunk links are misconfigured.
Why not VTP update? VLAN Trunking Protocol (VTP) updates propagate VLAN configurations across switches. While a VTP misconfiguration could cause issues, it's less likely to immediately disrupt connectivity for many users unless the VTP server deleted critical VLANs, which is not implied here.
Why not Port security issue? Port security restricts access based on MAC addresses, typically affecting individual ports, not causing widespread outages.
Why not LLDP misconfiguration? Link Layer Discovery Protocol (LLDP) is used for device discovery, and misconfiguration is unlikely to cause a broad loss of connectivity.
Reference:CompTIA Network+ N10-009 Objective 2.2: Explain the purpose of network segmentation and VLAN configuration. The CompTIA Network+ Study Guide (e.g., Chapter 6: Switching) discusses VLAN trunking and the importance of matching native VLANs on trunk links to prevent connectivity issues. Native VLAN mismatches are highlighted as a common cause of network disruptions.
NEW QUESTION # 351
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