Project Deliverable 4: Infrastructure And Security 164683

Project Deliverable 4 Infrastructure And Security

This assignment consists of two (2) sections: an infrastructure document and a revised Gantt chart or project plan. You must submit both sections as separate files for the completion of this assignment. Label each file name according to the section of the assignment for which it is written. Additionally, you may create and/or assume all necessary assumptions needed for the completion of this assignment. The last section of the project plan will present the infrastructure in accordance with the parameters set forth at the outset of the project.

The network solution that is chosen should support the conceived information system and allow for scalability. The network infrastructure will support organizational operations; therefore, a pictorial view of workstations, servers, routers, bridges, gateways, and access points should be used. In addition, access paths for Internet access should be depicted. A narrative should be included to explain all the nodes of the network and the rationale for the design. Lastly, using the Confidentiality, Integrity and Availability (CIA) Triangle, define the organizational security policy.

Paper For Above instruction

Introduction

Creating a robust and scalable network infrastructure is essential for organizations aiming to support their information systems securely and efficiently. This paper provides a comprehensive design of a network topology, including a physical and logical layout, security policies based on the CIA triad, and a detailed security framework addressing organizational and ethical considerations. The design ensures operational continuity, supports future expansion, and embeds security principles at every layer.

Design of the Network Infrastructure

Logical and Physical Topography

The network topology is crafted to facilitate both internal organizational processes and secure Internet connectivity. The physical layout depicted in the diagram (see Appendix A) integrates workstations, servers, network devices, and Internet access points. The logical layout aligns these components to optimize data flow, security, and scalability.

The physical infrastructure comprises a centralized server room housing critical servers and networking hardware. Workstations are distributed across departments with designated routers and switches connecting them to core network devices. Access points are strategically placed to provide wireless connectivity to mobile devices and remote employees.

Placement of Servers and Internet Access

Key servers include a file server, application server, database server, and email server, each positioned within secure zones protected by firewalls. The DMZ (Demilitarized Zone) hosts publicly accessible services like web servers and mail gateways, with strict access controls routing through firewalls for enhanced security. Internet access is channeled through secure gateways that filter traffic, prevent unauthorized access, and monitor data flow.

Security Measures and Network Nodes

The network leverages multiple security layers, including firewalls at the perimeter, intrusion detection/prevention systems (IDS/IPS), and secure VLAN configurations for segmentation. Workstations are equipped with endpoint security tools, and access points are secured with WPA2/WPA3 protocols. Network devices are managed with centralized security policies to ensure consistent configurations.

Rationale for Network Design

The logical separation of internal and external zones via firewalls ensures that sensitive data and services are protected from external threats. The inclusion of DMZ hosts critical web and email servers, facilitating secure external communications while isolating internal resources. Wireless access points are placed to provide coverage while minimizing security vulnerabilities. This design supports scalability, with modular components allowing future expansion without significant overhaul.

Organizational Security Policy Based on CIA Triad

Confidentiality

Confidentiality is maintained through encryption protocols (SSL/TLS, WPA3), access controls, and strict authentication mechanisms such as multi-factor authentication (MFA). Sensitive data stored on servers is encrypted at rest, with access limited to authorized personnel only.

Integrity

Data integrity is preserved through checksum verification, regular backups, and the use of secure communication protocols. Role-based access control (RBAC) ensures that users can only modify data within their purview, preventing unauthorized alterations.

Availability

High availability is prioritized with redundant network paths, uninterruptible power supplies (UPS), and failover clustering for critical servers. This ensures continuous access even in the event of hardware failures or external threats like Distributed Denial of Service (DDoS) attacks.

Ethical Aspects of Network Security

Organizational policies emphasize ethical behavior regarding network use, including respecting employee privacy, contractor confidentiality, and proper password management practices. Employees are educated on responsible use of resources, the importance of securing passwords, and recognizing social engineering threats. Access to networked resources is granted based on role necessity, aligning with ethical standards and legal requirements.

Conclusion

The proposed network infrastructure integrates a logical and physical layout designed for security, scalability, and operational efficiency. Implementing a security policy aligned with the CIA triad ensures organizational assets are protected. Addressing ethical considerations fosters responsible behavior and compliance, ultimately strengthening the organization’s security posture and operational resilience.

References

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