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Switching in the network can happen in two ways, these layer-two devices send frames but they can forward them in different ways. These different modes have positive and negative effects which depend on the type of network environment that runs through them! Store-and-forward is just like the name suggests, the switch …
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In a perfect world we would never need redundancy on a network infrastructure, but as you know as well as I know we don't live in a perfect world. Hardware will eventually fail, bottlenecks will appear, and the speed of our network will become slower when we max the bandwidth on links. So having redundancy in routers, …
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Some people hate it, some people love it. It's the Cisco proprietary VLAN Trunking Protocol (VTP) which in short means that Cisco switches can exchange VLAN configuration, instead of manually configuring each switch with the same VLANs. I also suggest if you don't know what a VLAN is check out the post Creating VLANs …
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