railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Communication Systems Basics of Communication System Elements of Communication System

डेटा संचार किसके संचरण को संदर्भित करता है?

1
ध्वनि 
2
कंप्यूटर डेटा
3
वीडियो 
4
उपरोक्त सभी
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