Q11,paper 3,june 12 x.25 is ________ Network

Options (A) Connection Oriented Network (B) Connection Less Network (C) Either Connection Oriented or Connection Less (D) Neither Connection Oriented nor Connection Less
Answer(A) Connection oriented network.
Explanation.
Most widely used x.25 an interface between DTE and DCE for terminal operation at the packet mode on public data network. It is a packet switching protocol used in a wide area network using virtual circuit and asynchronous TDM.Error detection and correction is done in both the data link and the network layers. Network layer establishes the connection, transfers the data and terminating the connection.