Answer:
Hope it helps dude the second paragraph is not part of your question but it's good to give information about the answer .
Explanation:
He should use lan network.
A local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link and typically share the resources of a single processor or server within a small geographic area (for example, within an office building). Usually, the server has applications and data storage that are shared in common by multiple computer users. A local area network may serve as few as two or three users (for example, in a home network) or as many as thousands of users (for example, in an FDDI network).
Well letterhead(s) i<span>s a heading a stationary, express a person or work name with the address
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Envelope(s) <span>is a covering that structures a layer </span>