Cisco CCNA accreditation Tutorial: Segmenting Your Network
When you’re getting started on your CCNA studies on your way to earning this particular certification, you’re swamped along with network device types that you’re familiar with, but not quite certain how to use. Let’s look at these types of networking devices and their primary purposes.
Hubs and repeaters operate at Layer One of the OSI model, and they have 1 main purpose – regenerating the electrical signal that will Layer One technologies have. This regeneration helps to prevent attenuation, the gradual deterioration of a signal. Much like the radio signal, the electrical signals that travel in Layer One gradually deteriorate as they travel across the cable. Hubs and repeaters each generate a “clean” duplicate of the signal.
While hubs and repeaters can be helpful, they do nothing as far as network segmentation is concerned. The first such gadget we encounter as we move up the particular OSI model is the change. Operating at Layer two, a switch creates several collision domains by default every switch port is considered its own little collision domain. in case 12 PCs are connected to a Cisco switch, you have 12 separate collision domain names.
Switches can be used to segment the particular network into smaller transmit domains, but this is not a default behavior. Virtual LAN (VLAN) configuration segments the system into smaller broadcast domain names, since a broadcast delivered by a host in one VLAN is heard only simply by other devices in the exact same VLAN.
Routers operate in Layer 3 of the OSI model and segment the network into multiple transmit domains by default. Routers do not forward broadcasts as changes do, making the router the only device of the four coming from discussed today that create several broadcast domains by default.
Knowing what each of these devices can plus cannot do is essential in order to passing the CCNA and becoming a great network administrator. Good luck to you in both of these objectives!
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