March 16, 2015
INDP Final Project The network requirements by Patton-Fuller have a few more points to add to the plan. There is an explanation on the final network design to include a timeline for the project. The design approach and rationale is covered briefly as well as an analysis of the detailed design. There was a specific requirement of 20MBps which led to a further explanation of various network data transmission rates. Security is the predominant aspect to this paper and it covers not only threats and protection methods, but also touches on the role of policy and procedures to operate safely. Last topic covered is the security hardware and software environment.
Network Design Changes The final network design will include moving the Cisco ASA 5510 VPN router from the backbone to perform as a dedicated line to the WAN. This also provides added security before connecting to the network. A change to the LAN design will be a bus to ring topology for the administrative departments and half the clinical areas will help reduce network traffic that will increase from wireless access. The addition of Wireless Access Points (WAP) to each admin area along with each clinical area will establish the Wireless LAN (WLAN). The additional three hospitals will be connected by establishing a duplicate Cisco VPN router and RAS Server at each location. Leased Broadband lines will provide the required 20Mbps connection speed to the hospitals along the Radiologist and Doctors from their homes. Each Radiologist will get a smart ID reader or biometric device to connect to the RAS Server from their homes to complete the Wide Area Network design. The network design can be viewed in Appendix A as the attached Microsoft® Visio® illustration.
The anticipated timeline for the project follows and each phase is expected to take 2-3 weeks.
Design Approach and Rationale. The design approach consisted of converting the network to a WLAN, installing a VoIP system, creating a high-speed WAN that includes 3 other hospitals and connecting 15 radiologists to connect with up to 20Mbps speed. The physical design was first followed up by the requirements to access the network remotely and finally followed up with testing and documenting. The physical design is the most intensive and the approach was to use as much of the current network architecture as possible. The justified the ease of reconfiguration to meet the needs for the WLAN implementation. The WAN would require the purchase of additional equipment such as biometric or smart card readers for radiologists, switches, and servers for the additional hospitals. Leasing a broadband line to service the WAN will also be required to meet the 20Mbps up/down transfer rate. Support of VoIP protocols will also have to be implemented. The OSI model was followed to ensure all requirements are met from the Physical Layer 1 to the Application Layer 7 along with the 4 layers of the TCP/IP.
Analysis of the Detailed Design The analysis of the detailed design shows that a majority of the hardware is already in place. The protocols and configuration is largely accomplished. The need for additional hardware will be required to complete the requirements, but it will limit the reconfiguration of the network to accommodate unrecognized hardware. The addition of a ring topology will only need minor configuration changes such as removing the termination on the bus and adding a switch to facilitate the creation of the ring. The addition of a VoIP, however, will require the incorporation of SONET protocol. Power over Ethernet (PoE) technology will easily enable the phones to get power directly from the network using simple network cables that already connect the many workstations.
Data Rate Requirements The desired data rate requirement is set at 20Mbps. The Cisco 3500 WAP devices already used by the ICU and ward rooms provide up to 54Mbps with 5GHz