Communication apparatus and storage medium storing program

A controller acquires communication destination information including at least a first external apparatus connected via a first communication interface or a second external apparatus connected via a second communication interface. The controller performs initialization of the first communication interface and the second communication interface. The initialization includes: in response to determining that an external apparatus indicated by the communication destination information is the first external apparatus, after completing initialization of the first communication interface, shifting to a communication waiting state in which transmission and reception of data is acceptable; and in response to determining that the external apparatus indicated by the communication destination information is the second external apparatus, shifting to the communication waiting state after completing initialization of the second communication interface. The controller performs communication with at least the first external apparatus or the second external apparatus. The communication includes transmission and reception of the data.