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System Administrator

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Planning for future network expansion requirements is essential to uninhibited company growth. The first diagram included shows the original company network design of 10 workstations connected to a single stackable switch. Business growth depends in part upon the company Internet web server and database server. The network’s initial flat topology, with workstations and servers connecting in a peer to peer fashion using a single ADSL line for Internet access was very limited. However, the current stackable network switch design has enabled IT staff to upgrade network infrastructure in order to keep up with company growth. The stackable design has provided no negative impact during upgrades to the 100 workstation network along with deploying services required to maintain an efficient, secure networkin which Active Directory with single sign-on, DNS, DHCP, and file sharing have replaced the former peer to peer design.
Currently the company is risking potential data loss along with performance issues directly related to the network working at maximum capacity. The good news is that our company growth has exceeded network capability. So, in consideration of the company’s success and growth rate, and 100 personnel in the new remote office, the company network should move to a three-layer hierarchical model. The three-layer model will result in increased network performance, redundancy, and scalability that can accommodate continuing sustained company growth. Workstations will be connected to Access Layer stackable switches, saving cost by redeploying current switches. Access Layer switches will uplink to a Distribution Layer switch that is connects to a redundant dual Core Layer switch configuration with a partial mesh topology. Note that each office sites will then be able to backup the other site. The Remote Warehouse location will backup its data to the network using DFS to synchronize data to the other offices overnight. All sites will be connected through a virtual LAN that uses MPLS technology for failover service (Cisco, 2011) and Active Directory DFS synchronization for data resource failover of web server, database, content management and files are always available. Partial mesh designs such as the one proposed provide hot standby disaster recovery capability, and zero downtime which justifies the upfront network expansion investment to ensure high network and resource availability that promotes the continued long term company growth projected.

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