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Definition
| hardware that connects network segments, processing and forwarding data at the data link |
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| connect your network to the outside world |
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| typically connect together only the machines within your network |
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| forwards a data packet as soon as it receives it, with out processing the packet or checking it for errors |
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| waits to receive 64 bytes of data before it forwards the first bytes of an outgoing packet |
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| the slowest type of switch, because it receives an entire frame before forwarding the first bit of the frame |
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| called a layer 2 router, layer three switch, IP switch, routing switch, switching router, or wirespread router. it preforms both routing and switching functions |
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| is use for load balancing among server groups, web caching and application redirection. also referred to as 4-7 switches because they also operate on layers 4 to 7 of the OSI model |
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| spanning-tree protocol (STP) and virtual LAN's (VLAN's) |
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Definition
| two of the services provided by switches |
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| STP, Spanning-Tree Protocol |
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Definition
| use for switching on layer 2 networks, which include bridges or switches. its main purpose is to stop network loops from occurring |
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| create a topology database so it can find and remove all redundant links |
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| when a switch starts up, its ports are in this state by default, ports don't forward frames |
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| it listens to BDPU's to make sure no loops occur on the network |
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| a port listens to BDPUs learns all the paths in the switched network. the port then populates its MAC address table |
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Definition
| the port sends and receives data frames on the bridged port after it has populated the MAC address table |
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| the port doesn't participate in frame forwarding or participate in the STP process |
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Definition
| bridge protocol data units |
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| frames that are meant for node in another VLAN are |
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Definition
| forward to a routing device |
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| add identifying information to each frame, including the VLAN in which it belongs |
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| the proprietary cisco standard for tagging |
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| VLANs advantages over physical LANs |
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Definition
| network designs change over time to meet new needs. With VLANs, you can alter a network's design without having to make a physical changes |
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