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CCNA Study Material
Cisco has defined a model commonly called the hierarchical internetworking model, which focuses on three main areas of your network. The core layer is the main structure of the network. Its concern is speed and reliable packet transfer. The distribution layer ensures that the packets are routed correctly between subnets and VLANs. The access, or desktop layer, connects the client nodes to the network (like workstations, for example). This layer also makes sure the packets are reliably delivered. Another topic in our study material is switching methods. Both switches and bridges are Layer 2 (or data link layer) network devices. Switches are based on hardware and have ports, whereas bridges are implemented through software. You'll certainly want to be familiar with routers. A router is a network device that carries data between network segments. Routers make it possible for all the users in a network to share a common connection to the Internet or a WAN. You supply configuration information via TFTP, virtual terminals, or network stations. Study the various components of a router. Know where each configuration is stored. Routing, or a routing protocol, is used between routers. Cisco seems to be focusing more on IP than on IPX, so IP is your main concern. Can you understand subnetting? Do you know how to recognize a subnet mask in decimal form? Do you know how to distinguish between classes of IP addresses? All of these things are part of ITTechTips.com's comprehensive CCNA study material designed to help you prepare for your exam successfully.
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