Explain the function and configuration of at least four-fifths of all required network devices, citing specific, credible sources. Authentication server (Microsoft Active Directory). Routers, switches, and/or hubs. Local and remote users. Workstations. File share (CIFS). Mail server. Web servers (both internal and external). Firewalls. Internet cloud. Web proxy. E-mail proxy. FTP server (for internal-to-external transport). Explain how the overall network design protects the organization from both inside and outside attacks, addressing all required network design features and considerations and citing specific, credible sources that support your assertions and conclusions. Address: Physical and virtual access. Logging requirements. Security policy. Firewalls. Proxy servers. The VPN tunnel. DMZ isolation. User authentication. Distribution of layer routers and switches. Explain how your layered design compensates for possible device failures or breaches in network security, addressing all key design features and considerations and citing specific, credible sources that support your assertions and conclusions. Include: Load balancing. Swappable devices. Standby backup devices. QoS prioritization. Vendor support for core and services. Explain how to make the file transfer process more secure, fully addressing FTP security risks and how specific FTP replacement devices add protection, clearly delineating the features of each device, and citing specific, credible sources that support one’s assertions and conclusions.