N10-009 Exam Dumps - CompTIA Network+ Questions and Answers

The correct answer is SLA (Service Level Agreement) because it is a formal, documented contract between a service provider and a customer that defines expected service standards. According to CompTIA Network+ (N10-009) objectives under network operations and service management concepts, an SLA outlines measurable performance metrics such as uptime percentage, response time, throughput, support availability, escalation procedures, and responsibilities of both parties.

An SLA ensures accountability and establishes clear expectations for service delivery. For example, a vendor may guarantee 99.99% uptime, define maximum resolution times for incidents, and specify penalties or credits if performance targets are not met. SLAs are critical in cloud services, ISP agreements, managed services, and enterprise vendor contracts.

An MOU (Memorandum of Understanding) is a non-binding agreement outlining general terms between parties but does not define enforceable service metrics. EOL (End of Life) refers to when a product is no longer sold or supported. EOS (End of Support) indicates when a vendor stops providing updates or assistance for a product.

Therefore, an SLA is the correct document that defines vendor-delivered service requirements.

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Understanding Subnetting:

Original Network: 192.168.1.0/24 has a subnet mask of 255.255.255.0, which allows for 256 IP addresses (including network and broadcast addresses).

Objective: Divide this network into two equal subnets.

Calculating Subnet Mask:

New Subnet Mask: To divide 192.168.1.0/24 into two equal halves, we need to borrow one bit from the host portion of the address, changing the subnet mask to 255.255.255.128 (/25).

Subnet Breakdown:

First Subnet: 192.168.1.0/25 (192.168.1.0 - 192.168.1.127)

Second Subnet: 192.168.1.128/25 (192.168.1.128 - 192.168.1.255)

Verification:

Each subnet now has 128 IP addresses (126 usable IP addresses, excluding the network and broadcast addresses).

Comparison with Other Options:

255.255.0.0 (/16): Provides a much larger network, not dividing the original /24 network.

255.255.254.0 (/23): Also creates a larger subnet, encompassing more than the original /24 network.

255.255.255.0 (/24): Maintains the original subnet size, not dividing it.

A split-tunnel VPN allows a device to route some traffic through the VPN (typically corporate traffic) while sending other traffic (like general internet browsing) directly over the local internet connection. This reduces the load on the corporate network because not all traffic is routed through the VPN tunnel.

Site-to-site VPNs are for permanent links between locations.

Full-tunnel VPNs route all traffic through the VPN, increasing the bandwidth usage on the corporate network.

GRE (Generic Routing Encapsulation) is a tunneling protocol that doesn’t encrypt and doesn ' t reduce bandwidth usage by itself.

???? Reference:

CompTIA Network+ N10-009 Official Objectives: 3.3 – Given a scenario, configure and deploy common VPN technologies.

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.

If a switch has port security enabled (such as sticky MAC or a configured allowed MAC), the port will only allow the original NIC’s MAC address. When a new NIC with a different MAC address is installed, the port rejects traffic, preventing network connectivity.

B. BPDU guard protects against rogue switches, not end hosts.

C. Link aggregation applies when bundling multiple uplinks, not a single PC connection.

D. PoE budget applies to powered devices like APs, not PCs.

References (CompTIA Network+ N10-009):

Domain: Network Troubleshooting — Port security, MAC address filtering, switch security features.

The problem is a subnet mismatch . The web server is using 255.255.255.0 , which places it in the 192.168.1.0/24 network. The database server is using 255.255.255.128 , which places 192.168.1.201 in the 192.168.1.128/25 network. So even though both addresses begin with 192.168.1, the two systems are not treating the network boundaries the same way.

That creates a Layer 3 communication issue because one host may believe the other device is local while the other host may treat traffic differently based on its smaller subnet. In a normal server segment like this, both systems should agree on the same mask if they are intended to be on the same network.

Changing the database server’s subnet mask to 255.255.255.0 fixes that inconsistency immediately. Then both servers and the firewall interface are using the same local network definition, and traffic can be handled properly.

The other options do not solve the real issue. Changing the firewall to /25 would break consistency for the rest of the segment. Pointing the database server to 1.2.3.4 is incorrect because that is outside the local subnet and appears to be an upstream route. Changing the IP to 192.168.1.150 still leaves the wrong mask in place. The clean fix is A .

The best solution here is band steering. Band steering allows modern wireless access points to automatically direct dual-band capable clients toward the 5 GHz band instead of the crowded 2.4 GHz band. The 5 GHz band has more available non-overlapping channels and can provide faster speeds with less interference, especially in dense environments. Devices that only support 2.4 GHz will remain on that band, while compatible devices enjoy the improved performance of 5 GHz.

A. 802.1X is a port-based network access control method for authentication. While important for security, it does not affect wireless channel utilization or client throughput.

B. MIMO (Multiple Input, Multiple Output) is a technology that improves throughput by using multiple antennas to send/receive simultaneously, but it does not actively steer clients between frequency bands.

C. ESSID (Extended Service Set Identifier) is just the network name for a set of APs in the same WLAN; it has no role in optimizing performance by band.

By implementing band steering, administrators reduce channel overlap on the 2.4 GHz band, improve spectral efficiency, and provide higher performance to capable devices, directly meeting the requirements described in the scenario.

References (CompTIA Network+ N10-009):

Domain: Networking Concepts — Wireless optimization, band steering, dual-band client management.

The correct answer is SAML (Security Assertion Markup Language). SAML is an XML-based standard used for single sign-on (SSO) and identity federation. It allows identity providers (IdPs) to share authentication and authorization data with service providers (SPs), passing secure tokens containing user attributes and credentials.

A. IAM (Identity and Access Management) is the broader framework, not specifically XML-based.

B. MFA enforces multiple factors for authentication but does not involve XML assertions.

C. RADIUS is an AAA protocol, but it uses UDP, not XML assertions.

SAML is widely used in federated identity systems, enabling secure authentication across different domains and applications without requiring multiple credentials.

References (CompTIA Network+ N10-009):

Domain: Network Security — Authentication methods, SAML, SSO.

A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

A screenshot of a computer AI-generated content may be incorrect.

Private VLANs (PVLANs) are used to segment devices on the same subnet and switch so they cannot communicate with each other, while still accessing a shared resource like a router or gateway. This is often used in shared hosting or DMZ environments.

A. ACLs (Access Control Lists) control traffic between networks, not within the same VLAN.

B. Trunking carries multiple VLANs between switches but does not isolate devices.

C. Port security limits MAC addresses per port but doesn’t isolate communication between ports.

???? Reference:

CompTIA Network+ N10-009 Official Objectives: 3.4 – Compare and contrast access control methods.

The most likely reason an insurance brokerage would enforce VPN usage is to encrypt sensitive data in transit. VPNs (Virtual Private Networks) create a secure tunnel between the user ' s device and the corporate network, ensuring that data is encrypted and protected from interception.

Encryption: VPNs encrypt data, preventing unauthorized access and ensuring data privacy during transmission over public or unsecured networks.

Data Protection: Essential for industries handling sensitive information, such as insurance brokerages, to protect customer data and comply with regulatory requirements.

Security: Enhances overall network security by providing secure remote access for employees.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Discusses the role of VPNs in securing data in transit.

Cisco Networking Academy: Provides training on VPN technologies and their importance in data security.

Network+ Certification All-in-One Exam Guide: Explains VPN usage and its benefits in protecting sensitive information.

Comprehensive and Detailed Explanation (paraphrased, aligned to N10-009):

SSH provides secure, scriptable remote access used by automation/orchestration tools (e.g., leveraging CLI, NETCONF over SSH, or Ansible modules) to push configurations at scale.

A. RDP is primarily for Windows GUI sessions and is not commonly used for network device automation.

B. Telnet can be scripted but is insecure (plaintext); modern best practice is to use SSH.

D. GUI access is typically manual and not ideal for scalable, repeatable automation.

References (CompTIA Network+ N10-009):

Domain: Network Operations — Configuration management, automation/orchestration, secure management protocols (SSH vs. Telnet), change at scale.

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When multiple redundant links exist between switches, Spanning Tree Protocol (STP) is required to prevent switching loops. STP blocks redundant paths but can allow aggregation if configured with protocols like LACP.

B. SVIs provide Layer 3 interfaces, not loop prevention.

C. Native VLAN defines the untagged VLAN but does not manage loops.

D. FHRP (VRRP, HSRP, GLBP) provides gateway redundancy, not switch uplink management.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — STP, redundancy, loop prevention.

The correct answer is B. tcpdump. According to the CompTIA Network+ N10-009 objectives, troubleshooting network connectivity often requires validating whether traffic is actually reaching a device. tcpdump is a command-line packet analyzer that captures and displays packets being transmitted or received on a network interface in real time. This makes it the most effective tool among the options for verifying whether a server is receiving network traffic.

When using tcpdump, a technician can observe incoming packets, identify source and destination IP addresses, check protocols, and determine whether expected traffic (such as HTTP, ICMP, or DNS) is reaching the server. This directly helps isolate issues such as firewall blocking, routing problems, or application-layer failures.

The other options serve different purposes. traceroute is used to identify the path packets take across a network and diagnose routing issues, but it does not confirm packet arrival at the server interface. nslookup is used to query DNS servers for name resolution and is unrelated to packet capture. arp is used to view or manipulate the Address Resolution Protocol table, which maps IP addresses to MAC addresses, but it does not show live traffic flow.

Therefore, tcpdump is the most appropriate tool for confirming whether the server is receiving network traffic.

The most likely cause of buffering issues when moving outdoors is signal degradation. Wireless signals weaken as they travel through obstacles such as walls, glass, and air, leading to weaker connections and reduced data rates.

Breakdown of Options:

A. Network congestion – While congestion can slow down network speeds, it affects all users, not just those moving outdoors.

B. Wireless interference – Interference is possible but is more likely caused by other wireless signals rather than outdoor movement.

C. Signal degradation – Correct answer. Wireless signals weaken with distance and obstacles such as walls, reducing performance.

D. Client disassociation – Disassociation occurs when clients lose connection to the AP, but the question states that users experience buffering, indicating they are still connected but with a weak signal.