Is serialization a required to transfer data over a wire?

Question

Below I read and wonder if the statement is true.

Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or a connection will be resurrected over the network later on the same or another computer environment. [1] When the result of a series of bits is re-read according to the serialization format, this can be used to create a semantically identical clone of the original object. For many complex objects, such as those that make extensive use of links, this process is not direct.

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