Gmdss_e3 : Element 3 - 501/605
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| The International Organization for Standardization has developed a seven-level reference model for a packet-radio communications structure. What level is responsible for the actual transmission of data and handshaking signals? |
| A) The physical layer. |
| B) The transport layer. |
| C) The communications layer. |
| D) The synchronization layer. |
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