N10-009 Exam Dumps - CompTIA Network+ Certification Exam

If the IP phone works but the workstation doesn't, it indicates that the Voice VLAN is functioning correctly, but the Data VLAN (C) is either misconfigured or missing. The workstation typically connects through the phone, which tags voice and data traffic separately using VLANs.

A. Voice VLAN is for the IP phone, which is already working.

B. Native VLAN is for untagged traffic on trunk ports, but doesn’t control access directly.

D. Trunk port is more relevant to switch interconnections than individual workstation ports.

📘 Reference:

CompTIA Network+ N10-009 Official Objectives: 2.3 – Given a scenario, configure and verify VLANs.

To increase overall security after a recent breach, implementing least privilege network access and central policy management are effective strategies.

Least Privilege Network Access: This principle ensures that users and devices are granted only the access necessary to perform their functions, minimizing the potential for unauthorized access or breaches. By limiting permissions, the risk of an attacker gaining access to critical parts of the network is reduced.

Central Policy Management: Centralized management of security policies allows for consistent and streamlined implementation of security measures across the entire network. This helps in quickly responding to security incidents, ensuring compliance with security protocols, and reducing the chances of misconfigurations.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Discusses network security principles, including least privilege and policy management.

Cisco Networking Academy: Provides training on implementing security policies and access controls.

Network+ Certification All-in-One Exam Guide: Covers strategies for enhancing network security and managing policies effectively.

The issue is that more students have arrived on campus, meaning the available IP addresses are exhausted. To fix this, the administrator should increase the DHCP scope size to allow more devices to obtain IP addresses.

Breakdown of Options:

A. Enable IP helper – IP helper is used to forward DHCP requests across different subnets. However, the problem here is that the DHCP scope is full, not that requests are not reaching the server.

B. Change the subnet mask – The subnet mask determines the number of available hosts, but changing it without increasing the IP pool does not help.

C. Increase the scope size – Correct answer. Expanding the DHCP scope provides more IP addresses for assignment.

D. Add address exclusions – Exclusions reserve IP addresses, which would further reduce available addresses instead of solving the issue.

802.1x is a network access control protocol that provides an authentication mechanism to devices trying to connect to a LAN or WLAN. This ensures that only authorized devices can access the network, making it ideal for mitigating the risk of unknown devices connecting to the network, especially in accessible areas.

802.1x Authentication: Requires devices to authenticate using credentials (e.g., username and password, certificates) before gaining network access.

Access Control: Prevents unauthorized devices from connecting to the network, enhancing security in public or semi-public areas.

Implementation: Typically used in conjunction with a RADIUS server to manage authentication requests.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Covers 802.1x and its role in network security.

Cisco Networking Academy: Provides training on implementing 802.1x for secure network access control.

Network+ Certification All-in-One Exam Guide: Explains the benefits and configuration of 802.1x authentication in securing network access.

When a new VLAN is created, it typically exists on a different subnet. If DHCP servers are on a different VLAN, the network needs an IP helper address to forward DHCP requests correctly. Without it, clients in the new VLAN won’t receive an IP address.

Breakdown of Options:

A. Scope size – Increasing the DHCP scope would not resolve the issue if requests aren't reaching the server.

B. Address reservations – Reservations only assign specific addresses to devices; they do not fix DHCP communication issues.

C. Lease time – Changing the lease time does not impact DHCP functionality across VLANs.

D. IP helper – Correct answer. This forwards DHCP requests across VLANs to the DHCP server.

A TXT record can be used to store SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) information, which help verify that an email has been sent from a trusted source.

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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.