What is true about connectionless packet switched networks? a. each datagram must contain both source and destination addresses b. without a connection, datagrams may not arrive in sequential order at the destination c. establishment of a connection between communicating points is not required prior to exchanging datagrams, thus reducing overhead communications d. all of the above are true

d. all of the above are true

Explanation:

Connectionless Packet Switching is a term that is used in computer networking operations to describe the breaking of information exchange path into a various packet of small sizes acquired and refined over network switches and routers, which is then transferred from one subsequent node to the other. It is sometimes referred to as Datagram Networks

However, during this operation, Connectionless Packet Switching must satisfy the following amongst others:

1.  each datagram must comprise both source and destination addresses

2.   without a connection, datagrams may not come in sequential order at the destination

3.  establishment of a connection between communicating points is not needed prior to exchanging datagrams, thus reducing overhead communications

Therefore, considering the available options, the correct answer is option D