Answer :

The client computer and a direct access server establish an infrastructure tunnel that is used to manage the direct access connection.

What is known as a tunnel?

A tunnel is a passage that has been carved through dirt, rock, or additional surrounding fabric. It is enclosed, save for the entrance and exit, which are often located at per end. Even though some modern tunnels were built using immersed tube construction techniques rather than traditional tunnel boring techniques, a channel is not a tunnel.

Cut-and-cover tunnels, which are built in a little trench and subsequently coated over, are one of three main forms of tunnel building that are frequently used. Bored tunnel built in place without removing the surrounding soil. They often have a horseshoe or circular cross-section. Some ideas of subsurface mining involve.

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