Practice Free N10-008 Exam Online Questions
Which of the following architectures would allow the network-forwarding elements to adapt to new business requirements with the least amount of operating effort?
- A . Software-defined network
- B . Spine and leaf
- C . Three-tier
- D . Backbone
A
Explanation:
Software-defined network (SDN) is a network architecture that allows the network-forwarding elements to be controlled by a centralized software application. This enables the network to adapt to new business requirements with the least amount of operating effort, as the network administrator can configure and manage the network from a single console, without having to manually configure each device individually. SDN also provides more flexibility, agility, and scalability for the network, as it can dynamically adjust the network resources and policies based on the application needs and traffic conditions.
Reference: CompTIA Network+ Certification Exam Objectives, page 5, section 1.3: “Explain the concepts and characteristics of routing and switching.”
Software-Defined Networking C CompTIA Network+ N10-007 C 1.3, video lecture by Professor Messer.
A network administrator is adding a new wired loT device to the internal network. The only devices that will be communicating are the HVAC system and the loT device.
Which of the following should the network administrator do?
- A . Set up a secure VM.
- B . Implement a reverse proxy.
- C . Set up the guest network isolation.
- D . Configure a dedicated VLAN.
D
Explanation:
When adding a new wired IoT device that will only communicate with the HVAC system, it is best
practice to configure a dedicated VLAN. This isolates the traffic between the IoT device and the HVAC system from the rest of the network, enhancing security and network efficiency.
Reference: CompTIA Network+ N10-008 Full Course for Beginners – Configuring SOHO Networks4 Network+ (Plus) Certification | CompTIA IT Certifications
A network engineer is investigating reports of poor network performance. Upon reviewing a report, the engineer finds hundreds of CRC errors on an interface.
Which of the following is the MOST likely cause of these errors?
- A . A bad wire on the Cat 5e cable
- B . The wrong VLAN assignment to the switchport
- C . A misconfigured QoS setting on the router
- D . Both sides of the switch trunk set to full duplex
A
Explanation:
CRC stands for cyclic redundancy check, which is a method of detecting errors in data transmission. CRC errors occur when the verification code calculated by the sender and the receiver do not match, indicating that some bits were corrupted during the transmission.
CRC errors are usually caused by physical layer issues, such as noise, interference, or damaged cables. Therefore, option A is the most likely cause of these errors, as a bad wire on the Cat 5e cable can introduce noise or interference that corrupts the data bits.
Option B is not a likely cause of CRC errors, as the wrong VLAN assignment to the switchport would affect the logical layer, not the physical layer. The wrong VLAN assignment would prevent the switch from forwarding the frames to the correct destination, but it would not cause errors in the data bits themselves.
Option C is also not a likely cause of CRC errors, as a misconfigured QoS setting on the router would
affect the network layer, not the physical layer. A misconfigured QoS setting would affect the priority or bandwidth allocation of the packets, but it would not cause errors in the data bits themselves. Option D is also not a likely cause of CRC errors, as both sides of the switch trunk set to full duplex would not introduce any errors in the data transmission. Full duplex means that both sides can send and receive data simultaneously, without causing collisions or interference. In fact, full duplex is the preferred mode for switch trunks, as it increases the bandwidth and efficiency of the link.
Reference: CompTIA Network+ N10-008 Study Guide, Chapter 2: Network Devices and Technologies, Section
Given the following output:
Which of the following attacks is this MOST likely an example of?
- A . ARP poisoning
- B . VLAN hopping
- C . Rogue access point
- D . Amplified DoS
A
Explanation:
The output is most likely an example of an ARP poisoning attack. ARP poisoning, also known as ARP spoofing, is a type of attack that exploits the ARP protocol to associate a malicious device’s MAC address with a legitimate IP address on a local area network. This allows the attacker to intercept, modify, or redirect network traffic between two devices without their knowledge. The output shows that there are multiple entries for the same IP address (192.168.1.1) with different MAC addresses in the ARP cache of the device. This indicates that an attacker has sent fake ARP replies to trick the device into believing that its MAC address is associated with the IP address of another device (such as the default gateway).
Reference: https://www.cisco.com/c/en/us/about/security-center/arp-spoofing.html
A company that replicated the production environment in a cloud environment is starting to use a load balancer to evenly distribute requests between both environments.
Which of the following does this scenario best describe?
- A . High availability
- B . NIC teaming
- C . FHRP
- D . Configuration backup
A
Explanation:
High availability refers to systems that are durable and likely to operate continuously without failure for a long time.
Using a load balancer to distribute requests between production and cloud environments ensures that if one environment fails, the other can take over, thus providing high availability.
An administrator wants to increase the availability of a server that is connected to the office network.
Which of the following allows for multiple NICs to share a single IP address and offers maximum performance while providing fault tolerance in the event of a NIC failure?
- A . Multipathing
- B . Spanning Tree Protocol
- C . First Hop Redundancy Protocol
- D . Elasticity
A
Explanation:
Reference: https://docs.oracle.com/cd/E19455-01/806-6547/6jffv7oma/index.html
A company ranis out a largo event space and includes wireless internet access for each tenant.
Tenants reserve a two-hour window from the company each week, which includes a tenant-specific SSID However, all users share the company’s network hardware.
The network support team is receiving complaints from tenants that some users are unable to connect to the wireless network Upon investigation, the support teams discovers a pattern indicating that after a tenant with a particularly large attendance ends its sessions, tenants throughout the day are unable to connect.
The following settings are common lo all network configurations:
Which of the following actions would MOST likely reduce this Issue? (Select TWO).
- A . Change to WPA encryption
- B . Change the DNS server to 10.1.10.1.
- C . Change the default gateway to 10.0.0.1.
- D . Change the DHCP scope end to 10.1.10.250
- E . Disable AP isolation
- F . Change the subnet mask lo 255.255.255.192.
- G . Reduce the DHCP lease time to four hours.
D, G
Explanation:
The issue described is related to network congestion and IP address allocation. When a tenant with
a large attendance ends its session, the DHCP lease time of 24 hours means that the IP addresses used by that tenant’s attendees are not released back into the pool for a full day. This can lead to an exhaustion of available IP addresses for subsequent tenants.
D. Change the DHCP scope end to 10.1.10.250: Increasing the DHCP scope end will provide more available IP addresses for allocation, reducing the likelihood of running out of addresses when there are many users.
G. Reduce the DHCP lease time to four hours: Reducing the DHCP lease time means that IP addresses are released back into the pool more quickly after being allocated, making them available for other users sooner and reducing issues with address exhaustion.
These changes would most likely alleviate issues with users being unable to connect after sessions with large attendances.
Reference: Best practices in managing DHCP include adjusting scope and lease times according to user patterns and network demand.
Professormesser
CompTIA Network+ Study Guide
A network administrator is investigating reports about network performance and finds high utilization on a switch uplink. The administrator is unsure whether this is an anomaly or normal behavior that will require an upgrade to resolve.
Which Of the following should the administrator reference to gain historical perspective?
- A . Device configuration review
- B . ARP table export
- C . Service-level agreement
- D . Network performance baseline
D
Explanation:
A network performance baseline is a set of metrics that represents the normal or expected behavior of a network under various conditions and scenarios. A network performance baseline can help a network administrator to investigate reports about network performance by comparing the current metrics with the historical metrics and identifying any deviations or anomalies. A network performance baseline can also help to plan and justify network upgrades by showing the trends and patterns of network utilization and performance over time.
A device configuration review is a process that involves checking and verifying the settings and parameters of a network device, such as a switch, router, firewall, or server. A device configuration review can help a network administrator to troubleshoot network issues by finding and fixing any errors, inconsistencies, or vulnerabilities in the device configuration. A device configuration review can also help to ensure compliance with security policies and best practices by applying the latest updates and patches to the device.
An ARP table export is a file that contains the contents of the ARP (Address Resolution Protocol) table of a network device. The ARP table is a data structure that maps IP addresses to MAC addresses on a local network. An ARP table export can help a network administrator to monitor and manage the network devices on a local network by showing their IP addresses and MAC addresses. An ARP table export can also help to detect and prevent ARP spoofing attacks by identifying any duplicate or malicious entries in the ARP table.
A service-level agreement (SLA) is a contract that defines the expectations and responsibilities of both parties in terms of service quality, availability, performance, and response time. An SLA can help a network administrator to provide and maintain a satisfactory level of service to the customers or users of the network by setting and measuring specific goals and metrics. An SLA can also help to resolve any disputes or issues that may arise between the service provider and the service consumer by establishing clear terms and conditions for the service delivery.
Client devices cannot enter a network, and the network administrator determines the DHCP scope is exhausted. The administrator wants to avoid creating a new DHCP pool.
Which of the following can the administrator perform to resolve the issue?
- A . Install load balancers
- B . Install more switches
- C . Decrease the number of VLANs
- D . Reduce the lease time
D
Explanation:
To resolve the issue of DHCP scope exhaustion without creating a new DHCP pool, the administrator can reduce the lease time. By decreasing the lease time, the IP addresses assigned by DHCP will be released back to the DHCP scope more quickly, allowing them to be assigned to new devices.
Reference: CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI
Model and Networking Protocols, Objective 2.3: Given a scenario, implement and configure the appropriate addressing schema.
https://www.networkcomputing.com/data-centers/10-tips-optimizing-dhcp-performance
Client devices cannot enter a network, and the network administrator determines the DHCP scope is exhausted. The administrator wants to avoid creating a new DHCP pool.
Which of the following can the administrator perform to resolve the issue?
- A . Install load balancers
- B . Install more switches
- C . Decrease the number of VLANs
- D . Reduce the lease time
D
Explanation:
To resolve the issue of DHCP scope exhaustion without creating a new DHCP pool, the administrator can reduce the lease time. By decreasing the lease time, the IP addresses assigned by DHCP will be released back to the DHCP scope more quickly, allowing them to be assigned to new devices.
Reference: CompTIA Network+ Certification Study Guide, Exam N10-007, Fourth Edition, Chapter 2: The OSI
Model and Networking Protocols, Objective 2.3: Given a scenario, implement and configure the appropriate addressing schema.
https://www.networkcomputing.com/data-centers/10-tips-optimizing-dhcp-performance