The process of creating secure pathways through networks or physical barriers, often referring to data transmission through encrypted channels.
From Old French tonel meaning 'cask' or 'barrel,' evolving to describe underground passages in Middle English. Extended to networking in the 1990s to describe data encapsulation methods.
Network tunneling creates 'pipes within pipes' - your data travels through the public internet like a sealed letter inside another envelope, invisible to prying eyes along the way.
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