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n a network or router fails.
Thus, when planning an internet, an organization must choose a design that meets the organization's need for reliability, capacity, and cost. In particular, the exact details of internet toplogy often depend on the bandwidth of the physical networks, the expected traffic, the organization's reliability requirements, and the cost of available router hardware.

Figure4.1 Routers Connections

Part Ⅱ Project

The main objective of this program is based on the LAN and WAN in a factory with five buildings needs in order to meet the current campus network as the goal for most applications.
The main contents included:
• The factory include five buildings, every building are 1000 meters apart.between the five buildings network is designed into WAN.
• Every building include five floors, and each floor contains 100 computers. Using the LAN to connect all the computers in one building.
•Selecting switches, as well as cable choice.
According to de demands of the requirement, we know that every building design in a LAN.
Through the structural wiring method, can be connected togethere multiple hub,forming a large-scale LAN, the LAN most used mixed topology,and tree and star in the majority.Each floor we use one router and the five routers connect with a switch.
Structured cabling system is the building or buildings within the transmission network both make the data communications equipment, switching equipment, and other information management systems connect to each other, but also enable these devices interconnected with the external communications network, including building to the external the network line connection point, and work area of all cables between the data terminal, and associated wiring components. A good structured cabling system equipment for its services, a certain independence, and can interconnect a number of different communications devices, such as data terminals, PC and the host, and public installations.
Campus Network Campus Network, rise buildings using fiber optic cable connections between the subsystems, which provides gigabit of bandwidth, there is ample room for expansion. The vertical subsystem of the shaft is located within a high-rise buildings, can use multi-mode fiber optic cable or large number of twisted pairs. The management zone subsystem into the equipment room subsystem, centralized management.

For many housing blocks, the method can be used between multiple devices. Divided into the central equipment room, and BAN devices section, the center of the entire local area network between devices the control center, equipped with external (Internet) internal communications in a variety of network equipment (switches, routers, video servers, etc.), the center switch through the BAN devices and optical switching devices connected in order to ensure high-speed data transmission. In this line of wiring devices placed on racks and network equipment, terminated on each floor inside the building from the trunk cable, and fiber termination connected to the network center.

5.1 Software configuration

Subnet Mask: 255.255.255.0
IP Address: 202.198.1. 1~100
Gateway: 202.198.1.1
DNS server: 202.198.8.10, 202.98.0.68

Figure 5.1 The design