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This option should be compared with the cost of deploying a number of smaller switches connected by a few long cables to a central switch. However, this apparent cost savings may be offset by the expense from the longer cable lengths required to connect every device on the LAN to one switch. Using a simple "cost per port" calculation, it may appear initially that the best option is to deploy one large switch at a central location. Other factors that impact the cost are its network management capabilities, embedded security technologies, and optional advanced switching technologies. The switch capacity includes the number and types of ports available and the switching speed. The cost of a switch is determined by its capacity and features. These factors include, but are not limited to:Īlthough there are many factors that must be considered when selecting a switch, the next topic will explore two: cost and interface characteristics. When selecting a device for a particular LAN, there are a number of factors that need to be considered. Planning ensures that all requirements, cost factors and deployment options are given due consideration.
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To meet user requirements, a LAN needs to be planned and designed. There is a range of switches available with a variety of features that enable the interconnection of multiple computers in a typical enterprise LAN setting. Although a switch is more expensive than a hub, its enhanced performance and reliability make it cost effective. In general, switches are chosen for connecting devices to a LAN. A LAN switch can also be used to interconnect network segments of different speeds. Additionally, a switch provides dedicated bandwidth on each port, which can increase LAN performance. This creates a point-to-point logical topology to the device on each port. Each port on the switch creates a separate collision domain. Unlike the hub, a switch reduces the collisions on a LAN. This device is used to segment a network into multiple collision domains. A hub is typically chosen as an intermediary device within a very small LAN, in a LAN that requires low throughput requirements, or when finances are limited.Ī switch receives a frame and regenerates each bit of the frame on to the appropriate destination port. Although multiple hubs can be interconnected, they remain a single collision domain. The ports use a shared bandwidth approach and often have reduced performance in the LAN due to collisions and recovery. This means that the LAN uses multiaccess media. The two most common devices used are hubs and switches.Ī hub receives a signal, regenerates it, and sends the signal over all ports. To create a LAN, we need to select the appropriate devices to connect the end device to the network.
#SMART SERIAL CABLES SERIES#
Depending on the series or model of router, there can be multiple interface types for connection of LAN and WAN cabling. This is usually UTP cabling, but modules can be added for using fiber-optics. The router's LAN interfaces allow routers to connect to the LAN media. They can have both LAN and WAN interfaces. Routers are also used to interconnect networks that use different technologies. Routers have the ability to break up broadcast domains and collision domains. Each port on a router connects to a different network and routes packets between the networks. Routers are the primary devices used to interconnect networks. Inside the LAN will be one or more hubs or switches to connect the end devices to the LAN. Each LAN will have a router as its gateway connecting the LAN to other networks. These services and features are covered in the more advanced courses. It is important to note that routers offer many services and features to the LAN. For this course, the choice of which router to deploy is determined by the Ethernet interfaces that match the technology of the switches at the center of the LAN.