N10-009 Exam Dumps - CompTIA Network+ Certification Exam

BYOD (Bring Your Own Device) policies define rules for using personal devices on the company network. Since the new employee is using a personal laptop, this policy applies.

Breakdown of Options:

A. IAM (Identity and Access Management) – Governs user permissions, not device policies.

B. BYOD (Bring Your Own Device) – ✅ Correct answer. Covers using personal devices for work.

C. DLP (Data Loss Prevention) – Focuses on preventing sensitive data leaks, not device usage policies.

D. AUP (Acceptable Use Policy) – Covers internet and system usage, but not personal device rules.

An evil twin is a rogue Wi-Fi access point that mimics a legitimate network. Attackers use it to intercept and manipulate traffic, making it an on-path (formerly MITM) attack opportunity.

Breakdown of Options:

A. Phishing – Tries to steal credentials through fake emails/websites but does not intercept network traffic.

B. Dumpster diving – Involves physical security breaches, not network interception.

C. Evil twin – ✅ Correct answer. A rogue Wi-Fi AP impersonates a real network, allowing traffic interception.

D. Tailgating – Involves physical access security, not network interception.

Understanding Multicast:

Multicast IP Address Range: The multicast address range is from 224.0.0.0 to 239.255.255.255, designated for multicast traffic.

Multicast Applications:

Use Case: Multicast is used for one-to-many or many-to-many communication, suitable for applications like audio and video broadcasting where the same data is sent to multiple recipients simultaneously.

Appropriate Network Selection:

224.0.0.0/24 Network: This range is reserved for multicast addresses, making it the appropriate choice for setting up a multicast network.

Comparison with Other Options:

172.16.0.0/24: Part of the private IP address space, used for private networks, not designated for multicast.

192.168.0.0/24: Another private IP address range, also not for multicast.

240.0.0.0/24: Reserved for future use, not suitable for multicast.

Border Gateway Protocol (BGP): BGP is the most commonly used routing protocol for interconnecting WANs, especially across the internet. It is used for exchanging routing information between autonomous systems (AS), making it the backbone protocol for large-scale WANs.

IGP (A): Interior Gateway Protocols like OSPF and EIGRP are typically used within a single AS, not between them.

EIGRP (B): While it is efficient, EIGRP is primarily used for intra-domain routing and not ideal for WAN interconnection.

OSPF (D): While OSPF can be used for WANs, it is not as common as BGP for inter-AS communication.

The answer is D. BGP . When a company wants a redundant internet connection , especially across more than one external path or provider, Border Gateway Protocol (BGP) is the routing technology most commonly associated with that design. BGP is used between autonomous systems and is the standard protocol for making routing decisions across the internet or between an organization and one or more ISPs.

The other options are interior routing protocols. EIGRP , RIPv2 , and OSPF are generally used inside an organization to exchange routes within a private network environment. They are not the normal answer when the question specifically says internet connection redundancy . That wording points outward, beyond the internal LAN or campus routing domain.

In practical terms, BGP gives administrators a way to influence path selection, advertise network prefixes, and maintain reachability if one outside connection fails. That is why it appears in questions involving multihoming, ISP failover, or resilient edge connectivity. Since the scenario mentions redundant firewalls and a need for a redundant internet connection, the best match is the routing technology designed for external route exchange. For Network+, that technology is BGP .

Packet loss occurs when network packets fail to reach their destination, leading to disruptions in connectivity and performance issues. In this scenario:

Users report connectivity issues and lag during video meetings.

The administrator detects increased retransmissions in tcpdump, which is a strong indicator of lost packets that must be resent.

Video meetings are particularly sensitive to packet loss, leading to buffering, frozen screens, and dropped calls.

Latency (Option A) refers to delayed data transmission but does not necessarily cause retransmissions.

Bottlenecking (Option C) happens when a network component (e.g., router, switch) cannot handle the traffic load, but packet retransmissions are more directly related to packet loss.

Jitter (Option D) affects the consistency of packet arrival times, but the symptoms described here are more aligned with packet loss rather than timing variations.

? Reference: CompTIA Network+ (N10-009) Official Study Guide – Section: Troubleshooting Connectivity Issues

The correct answer is D: Increase the scope to 10.8.100.50 – 10.8.100.175. According to the CompTIA Network+ N10-009 objectives, proper DHCP scope configuration is essential to ensure all hosts can obtain valid IP addresses and communicate beyond their local segment.

In this scenario, the DHCP scope is configured for 10.8.100.50 through 10.8.100.150, while a reservation range exists from 10.8.100.151 through 10.8.100.175. The network scan shows that IP addresses up to 10.8.100.175 are already in use. This indicates that some devices are either statically assigned addresses outside the active scope or are failing to receive valid DHCP leases, causing the new laptops to communicate only with each other—often a sign of APIPA or improper addressing.

To ensure full connectivity, the DHCP scope must be expanded to include the entire range of addresses that are actively in use, including the reserved addresses. Option D correctly extends the scope to 10.8.100.175 without overlapping lower addresses that may be statically assigned or intentionally excluded.

The Network+ objectives emphasize avoiding address conflicts and ensuring DHCP scopes align with real-world network usage. Expanding the scope to include all valid addresses ensures that all laptops can obtain proper IP configuration, default gateway information, and full network connectivity.

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.