Cisco7

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|1 |Principio del formulario |
| |What is the purpose of the preamble in an Ethernet frame?|
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| |is used as a pad for data |
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| |identifies the source address |
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| |identifies the destination address|
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| |marks the end of timing information |
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| |is used for timing synchronization with alternating patterns of ones and zeros |
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| |Final del formulario |
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|[pic]|Principio del formulario |
|2 |What is a function of the data link layer? |
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