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Prepare for the CompTIA Network+ N10-009 exam with this free practice test. Randomly generated and customizable, this test allows you to choose the number of questions.
In a network, which factor determines the selection of the best path for data packet traversal?
Diverting traffic
Bandwidth
Metric
The metric is a standardized value used by routing protocols to determine the shortest or most efficient path to route a packet across multiple network segments. Metrics are important as they help dynamic routing protocols like OSPF or BGP decide the best path. They could take into account various factors like bandwidth, delay, hop count, or cost. For instance, OSPF uses a cost based on bandwidth, while distance vector protocols like RIP use a hop count metric. While the bandwidth and diverting traffic responses might seem plausible, they are not the standardized measures used in route selection algorithms, especially in dynamic routing scenarios.
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A company has recently implemented a new Wi-Fi network in their office. Employees are experiencing intermittent connectivity and slow network performance. Investigation shows that the Wi-Fi access points are broadcasting on overlapping channels. Which of the following would be the best course of action to resolve this issue?
Increase the signal strength of all access points to maximize coverage
Change all Wi-Fi passwords to restrict network access
Change the channels on the access points to non-overlapping settings such as channels 1, 6, and 11
Reposition all access points to different locations within the office
Changing the channels on the access points to non-overlapping channels (e.g., channels 1, 6, and 11 in a 2.4 GHz band) will reduce interference among the signals, improving connectivity and performance. Channels 1, 6, and 11 do not overlap with each other in the frequency spectrum in the 2.4 GHz band, thereby minimizing the chance of cross-channel interference. Using other channels or repositioning the APs may not necessarily prevent overlap, depending on the other channels in use and physical characteristics of the office.
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When initially addressing a network outage, what should be done FIRST according to the standard troubleshooting methodology?
Duplicate the problem
Gather information
Question users
Establish a theory of probable cause
The correct answer is 'Gather information'. According to the troubleshooting methodology, the first step in identifying the problem is to gather all relevant information regarding the issue. This includes understanding the symptoms and the impact of the issue. While questioning users and duplicating the problem are part of the process, they come after initially gathering all necessary data to understand what might be going wrong.
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Which of the following best describes the Ethernet frame size specified under the 802.3 standards?
1500 to 1522 bytes
100 to 1500 bytes
128 to 1024 bytes
64 to 1518 bytes
The standard Ethernet frame size under the IEEE 802.3 specification has a minimum length of 64 bytes and a maximum length of 1518 bytes, including headers and trailers. It is essential for network analysts and administrators to know these details to ensure proper network function and compatibility with various networking devices and protocols. The other answers provided are incorrect as they do not accurately represent the frame sizes specified by the standard.
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MTTR refers exclusively to the time taken to detect a network issue.
False
True
MTTR, or Mean Time to Repair, encompasses the entire duration from when a failure is detected to when the device or system is repaired and operational again. It is not limited to just the detection time but also includes diagnosis, repair, and verification stages. This metric is vital in assessing the reliability and efficiency of maintenance processes in network operations.
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In a large data center, a network engineer is optimizing the flow of traffic between servers within the same layer to reduce latency and improve performance. This type of traffic flow is known as:
East-west
North-south
Diagonal
Vertical
East-west traffic refers to the flow of data between devices in the same data center (horizontally), typically bypassing the traditional north-south route through core network devices. This is crucial for enhancing speed and efficiency in environments with high inter-server traffic, such as hyper-scale cloud data centers or large virtualized systems.
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Which technology offers the best solution for linking multiple data centers to enable them to operate cohesively, with support for high-volume traffic and extensive scalability?
Generic Routing Encapsulation (GRE)
Internet Protocol Security (IPSec)
Layer 2 Tunneling Protocol Version 3 (L2TPv3)
VXLAN
VXLAN is the correct answer as it enables the creation of a large number of virtualized Layer 2 networks over a physical Layer 3 network. This capability is highly suitable for DCI applications because it allows for extensive scalability and efficient traffic management necessary for interconnected data centers, supporting high-volume traffic demands. In contrast, GRE provides tunneling capabilities without inherent scaling or segmentation features, making it less ideal for complex DCI. L2TPv3 focuses on Layer 2 tunneling over IP networks for VPN services and does not specifically target the high scalability demands of DCI like VXLAN does.
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What environment is specifically suited for the use of plenum-rated cables?
Underground network tunnels without climate control
Inside standard office wall partitions
In plenum spaces, where air circulation for HVAC systems occurs
In outdoor environments exposed to weather
Plenum-rated cables are designed to retard the spread of fire and emit low smoke when exposed to heat. They are used in spaces that facilitate air circulation for heating and air conditioning systems, known as plenum spaces. These areas typically require materials that meet specific fire and smoke safety standards.
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A network administrator suspects that a network issue is related to an incorrect configuration on a newly deployed router. After interviewing users and identifying the symptoms, the administrator has established a theory. What is the BEST next step to confirm if their theory about the router's configuration is the cause of the issue?
Analyze the router's log files for error messages.
Implement the suspected configuration changes on a test router or in a controlled segment of the network.
Reboot the router to see if the problem persists.
Replace the router with a different model to determine if the issue resolves.
The best step after forming a theory is to test the theory to determine the cause. This is often done by simulating or recreating conditions under controlled environments to see if the issue can be replicated and thus confirm the theory. By testing the configuration changes in a controlled manner, the administrator can verify if the changes resolve the issue without affecting the production environment. Analyzing logs may provide useful information but does not directly test the theory. Rebooting the device or replacing the router are premature actions without confirming the theory first.
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A multinational company must adhere to strict privacy laws concerning personal information of individuals from a European region. Which of the following is the BEST practice for managing data locality to ensure compliance?
Storing backups of the personal information in international locations while processing takes place within the region
Utilizing local data centers within the same region for storing and processing all related personal information
Employing robust encryption for the personal information while it is transmitted to external regions
Utilizing local data centers in the region is the best practice for managing data locality to ensure compliance with privacy laws focused on European individuals. This is due to regulations requiring that personal data be processed and stored within the same region unless adequate protections and legal agreements are established elsewhere. Other options may not adhere as closely to statutory requirements, or they might introduce additional compliance challenges or data exposure risks.
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IP address management tools are only used for documenting static IP addresses assigned within a network.
False
True
IP address management (IPAM) tools are designed to manage both dynamic and static IP addresses. They provide a comprehensive solution for planning, tracking, and managing the IP address infrastructure within an organization. This includes DHCP management, which handles dynamic addresses, showing that the management of only static IPs is a misunderstanding of IPAM functionalities.
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An enterprise has recently expanded its operations, and employees are experiencing slow network speeds. The IT manager suspects the issue might be due to the current throughput not meeting the increased demand created by additional users and upgraded applications. What would be an effective method to confirm if throughput capacity is indeed the root cause of the slow network speeds?
Replace all existing Ethernet cables with higher category ones.
Increase the number of access points in the network.
Upgrade the firmware on all network routers.
Inspect all networking devices for hardware faults.
Perform network bandwidth analysis.
Performing a network bandwidth analysis would provide data on the actual bandwidth being used compared to the available bandwidth. If the analysis shows that the actual usage is consistently near or at the capacity of the network, it is likely that increasing the throughput capacity would resolve the issue. Inspecting cables or replacing network devices, while important in general, would not directly determine if throughput capacity is the issue.
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What is the primary purpose of Classless Inter-domain Routing (CIDR) in network configuration?
To extend the usable life of IPv4 by adding additional bits to the IP address structure
To restrict network traffic by implementing stricter IP address regulations
To allow variable length subnet masks, improving IP address allocation and route summarization
To enhance the security features embedded within IP addresses through encryption techniques
CIDR was developed to improve the allocation of IP addresses and allow for more efficient routing. It replaces the older system based on classes (A, B, C) with a more flexible system that can assign IP addresses with varying prefix lengths. This makes it possible to create IP networks with a size that is tailored to the number of devices rather than being limited to sizes defined by classful network design. This efficiency is achieved by permitting the use of variable-length subnet masks (VLSM) which divides IP addresses into subnets of different sizes. This method conserves IP addresses and supports route aggregation, which simplifies routing tables and improves routing efficiency.
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An organization uses a network configured with routers handling multiple subnets. While establishing a route for new data packets, which type of address does the router primarily use to determine the next hop?
MAC address
Service number
IP address
Port number
Routers at the network layer generally use IP addresses to make decisions about packet forwarding, routing them to the next hop based on the routing table. MAC addresses are used in Layer 2 for device identification on the same network segment and not for routing decisions, making them incorrect for this context. Port numbers and service numbers are associated with TCP/UDP in the transport layer and layer 4 services respectively, which are not used for routing decisions at the network layer.
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A large organization with various departments requires a systematic approach to handle the complexity of their network address spaces. Which tool is most appropriate for maintaining an organized system for documenting, tracking, and allocating network addresses?
Configuration Management Database (CMDB)
Domain Name System (DNS) server
Dynamic Host Configuration Protocol (DHCP) server
IP Address Management (IPAM) software
IP Address Management (IPAM) software is designed to provide a centralized management solution for documenting, tracking, and allocating network addresses. It helps prevent conflicts and ensures compliance with policies regarding network address allocation. Other options like DHCP and DNS are crucial for dynamic allocation and hostname resolution but do not provide comprehensive tools for managing the history or documentation of network address allocations. A CMDB manages information about IT assets but isn't specifically focused on network address management.
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