After implementing a solution and putting preventive measures in place, the next step is to verify that the system is functioning correctly. This ensures that the issue has been fully resolved.

Reference: CompTIA Network+ Certification Exam Objectives - Remote Access Methods section.

The three-tier hierarchical model in network design consists of three layers: access, distribution, and core. The access layer is where devices like PCs and printers connect to the network. The distribution layer aggregates the data received from the access layer switches before it is transmitted to the core layer, which is responsible for high-speed data transfer and routing. This approach improves scalability and performance in larger networks. References: CompTIA Network+ Exam Objectives and official study guides.

To access the internet using static IPs, the firewall (or router) must be configured correctly:
B). Default gateway: This is essential because it tells the firewall where to send outbound traffic destined for outside the local network.
D). One static IP address: The firewall must be assigned one of the static IPs to communicate over the public internet.
The other options are not essential for basic internet connectivity in this context:
A). NTP server: Useful for time synchronization but not required for internet access.
C). The modem's IP address: Irrelevant unless doing modem-level configuration.
E). DNS servers: Important for name resolution but not for basic layer 3 connectivity.
F). DHCP server: Not used when static IPs are assigned.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 2.2 - Compare and contrast addressing technologies.

When a network administrator installs a new Network Interface Card (NIC) and users are unable to reach the server, one of the common issues is the use of an incorrect cable type. Network cables must match the specifications required by the NIC and the network infrastructure (e.g., Cat5e, Cat6 for Ethernet).
* NIC Compatibility: The new NIC might require a specific type of cable to function properly. Using a cable not rated for the NIC's required speeds or capabilities can result in connectivity issues.
* Cable Standards: Different NICs and network devices might need different cabling standards (straight-through vs. crossover cables, or specific fiber optic types).
* Connection Types: Ensuring that the cable connectors are appropriate for the NIC ports (e.g., RJ45 for Ethernet, LC connectors for fiber optics).
Network References:
* CompTIA Network+ N10-007 Official Certification Guide: Discusses network cabling standards and NIC specifications.
* Cisco Networking Academy: Provides insights into cabling and NIC configurations for optimal network performance.
* Network+ Certification All-in-One Exam Guide: Offers comprehensive details on troubleshooting network connectivity issues, including cabling problems.