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Mr. Dubey • 52.49K Points
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Q. The required resources for communication between end systems are reserved for the duration of the session between end systems in                  method.

(A) packet switching
(B) circuit switching
(C) line switching
(D) frequency switching
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Explanation by: Mr. Dubey 
 in circuit switching, a physical path between the sender and receiver is established. this path is maintained until the connection is needed. circuit switching is implemented in the physical layer and is used in telephonic systems.

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