Wide Area Networks (WANs) at FNUCurrently, FNU supports its wide area network operations using a mesh topology of three (3) Layer2 VPLS (Virtual Private LAN Service) point-to-point circuits. This mesh guarantees redundancy between the Headquarters, Operations (Data Centre), and Backup sites.Each regional and metropolitan campus is also redundantly connected to the major facilities (links to Headquarters, Operations and Backup respectively) via Frame Relay permanent virtual circuits (PVC). Similarly, two separate frame relay Internet Service Providers (ISP) are used for redundant Internet access: one PVC via the main Campus (Headquarters) and the other PVC via the Backup site. The external partners are connected to FNU via DSL.Campus Network in FNU (Main, Metro, and Regional Campuses)Each FNU campus is supported by 100Base-TX Switched Ethernet LANs, and FNU is expecting to upgrade to more modern Switched Ethernets. Staff at FNU are distributed as follows:1.250 employees including academic (x150), administrative (x50) and management staff (x50).There are about 2,000 on-campus students in each of the regional and metrocampuses.2.The main campus houses around 2,000 employees including academic (x1000);administrative (x500) and management staff (x500). Nearly 15,000 on-campusstudents are studying at the maincampus.The Operations facility is also supported by 100Base-TX Switched Ethernet LANs. In the Operationsfacility, there are 100 engineers in charge of technical support of the data centre, networking, maintenance, and application development. The organisational and operational structure of the Backup facility is similar to the structure of the Operations facility.Academic staff at the main campus, regional, and metro campuses teach courses in seven faculties, namely: arts and humanities, business, social sciences, mathematics, computer science, the physical sciences, and health sciences. The administrative staff handle admissions, student records, and otherstudent operational functions. The management staff consists of human resources, senior management and information technology. Enrolment at FNU has almost tripled in the past three years; and the faculty and admin staff has doubled insize.Each campus backbone (including main, regional and metro campuses) supports the operations of the seven faculties, management, and administrative staff. The following are the details of the IT infrastructure:1.A high-end switch in each building is connected to a high-end Campus core switch in the campus backbone.2.Within each building, 24-port Ethernet switches on each floor connect end usersystems.3.Floor switches are connected to the high-end buildingswitch.4.The 100Base-TX switches are layer-2 switches running the IEEE 802.1D Spanning TreeProtocol.5.All devices are part of the same broadcast domain. All devices (except public servers) arepart of the 192.168.0.0 internalnetwork6.Addressing for end-user hosts is accomplished with DHCP. A Windows server in the cluster located in the Operations facility acts as the DHCPserver.
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