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Update index.md (#32509)

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2019-01-21 14:08:26 -05:00
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guide/english/network-engineering/data-frames/index.md
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@ -9,7 +9,7 @@ Frames are divided into control information and data (also called the 'payload')
![A frame in data link layer](http://www.highteck.net/images/156-Datalink-PDU.jpg) ![A frame in data link layer](http://www.highteck.net/images/156-Datalink-PDU.jpg)
The Data Frame header contains protocol specific information but all headers include the protocol being used and source/destination MAC addresses. Common Layer 2 protocols include Ethernet and Point-to-Point Protocol (PPP). Data Frame trailers typically contain a Frame Check Sequence (FCS) that allows the receiving device to verify the integrity of the received frame. The Data Frame header contains protocol specific information but all headers include the protocol being used and source/destination MAC addresses. Common Layer 2 protocols include Ethernet (IEEE 802.3), WiFi (IEEE 802.11), and Point-to-Point Protocol (PPP). Data Frame trailers typically contain a Frame Check Sequence (FCS) that allows the receiving device to verify the integrity of the received frame.
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