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Answer: Preamble
Explanation:
Preamble is a 7- octet pattern of alternating the 0's and 1's and it allow devices in the network to easily synchronized the receiver clock. It also provide the bit level synchronization.
It basically allow the start of frame delimiter to provide the byte synchronization and assign a new frame. The bits are transmit orderly from left to right in the frame.
The answer to the given picture is - Microsoft word's spell checker only recognizes very common words. Microsoft word has it's own dictionary which will be compared to the texts on your document. If they see an unfamiliar word they will underline it with red. Anyways you can add your own words and names to the custom dictionary.
The Information Age<span> (also known as the Computer </span>Age<span>, Digital </span>Age, or New Media Age<span>) is a period in human history characterized by the shift from traditional industry that the Industrial Revolution brought through industrialization, to an economy based on </span>information<span> computerization.</span>