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Introduction
In an era where digital connectivity is pivotal to business operations, designing an effective and secure local area network (LAN) and internet infrastructure is crucial for companies like DesignIT that rely heavily on high-speed data transfer and connectivity. As they transition into a new 56'x36' space, a comprehensive network plan must address their current and future needs, balancing performance, security, scalability, and cost-effectiveness. This proposal outlines a suitable network design, architecture, wiring considerations, hardware options, security strategies, and a detailed cost analysis to support DesignIT’s growth and operational efficacy.
Network Design and Architecture
The recommended network architecture for DesignIT is a hierarchical structured LAN, employing a star topology reinforced with managed switches and wireless connectivity. This design ensures high performance, reliability, and ease of management. The core components include a main switch connected to each device, servers, printers, and wireless access points (APs). The servers—the Web Server on Microsoft IIS, the File Server with Microsoft Server 2008, and the Small Business Server—will be centrally located in the server room, interconnected via high-speed gigabit Ethernet switches to ensure speedy data exchange. For the wireless LAN, dual-band 802.11ac or ax access points will provide reliable wireless coverage, supporting portable devices and accommodating scalability.
Wiring Considerations
For LAN wiring, Category 6 (Cat6) cables are recommended because they support gigabit speeds and
future upgrades to 10-gigabit Ethernet if needed. Each workstation, server, printer, and wireless access point should be connected via Ethernet cables to the main switch in the server room, with cable runs organized to minimize interference and maintain cable length limits (up to 100 meters). Wireless access points should be strategically placed for optimal coverage, ideally in central locations and high ceilings to avoid dead zones. Conduit pathways and cable management systems are crucial to facilitate future expansions or reconfigurations, with adequate power outlets to support active networking devices.
Hardware Options and Costs
Hardware selection involves switches, routers, wireless access points, and security appliances. A recommended setup includes:
Gigabit Ethernet switches (24-port managed switches) — approximately $500 each
Wi-Fi 6 access points — approximately $200-$300 each
Enterprise-grade router with firewall capabilities — approximately $800
Network security appliances (e.g., unified threat management system) — approximately $1,200
Servers (existing configurations to be integrated, additional equipment may include rack mounts and UPS for power backup) — costs vary ($2,000 - $5,000)
Total estimated hardware costs are approximately $7,000—$10,000, depending on brands and specific models.
Security Considerations
Security is paramount, especially with servers hosting critical business data. The proposed security measures include:
Firewall: An enterprise-grade hardware firewall to monitor and filter incoming and outgoing network traffic, protecting against unauthorized access and cyber threats. Costs range from $800 to $1,500.
Antivirus/Anti-malware Software: Enterprise solutions such as Symantec Endpoint Protection or McAfee
Total Protection; annual licenses typically cost between $30-$50 per device, with 6 devices totaling roughly $180-$300 annually.
Additional security practices involve regular updates, user access controls, and VPN for remote access.
The network should also incorporate segmentations, such as separate VLANs for servers, printers, and user devices, to reduce the risk of threats spreading across devices.
Cost Analysis
Item Details
Estimated Cost
Hardware
Switches, routers, access points, servers
$8,000
Installation Labor
Network wiring, device setup, configuration
$2,000
Security Software
Firewall, antivirus, malware protection
$1,200
Service & Maintenance
Support, updates, warranty
$1,000 annually
Total Estimated Cost
$12,200 (initial), plus annual support costs
Single Point of Failure and Mitigation Strategies
A significant vulnerability exists in reliance on a single switch or network device—should it fail, entire network connectivity could be compromised. To mitigate this, network redundancy should be implemented through redundant switches with link aggregation, as well as backup power supplies (UPS)
for critical devices. Additionally, implementing multiple wireless access points with overlapping coverage ensures wireless redundancy. Regular backups of server configurations and network settings prevent data loss and enable quick recovery from failures.
Conclusion
This proposal emphasizes a robust, secure, and scalable network infrastructure tailored to the operational needs of DesignIT in their new space. Utilizing a hierarchical LAN architecture with high-quality wired and wireless components, supported by appropriate security measures, ensures high performance and protection for critical business data. The investment outlined balances upfront costs with long-term benefits, including scalability, redundancy, and security, facilitating the company's growth and operational efficiency.
References
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Odom, W. (2016). CCNA Routing and Switching 200-125 Certification Guide. Cisco Press.
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Thomas, R. (2018). Wireless Communications: Principles and Practice. Pearson.
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