Question
What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?
Answer Options
- A) The checksum overflows
- B) The connection is dropped
- C) Packets will be routed incorrectly
- D) Encoding reverts to the default character set
Correct Answer: B
Explanation
ARQ (Automatic Repeat reQuest) digital modes are designed to handle poor propagation by automatically requesting retransmission (retries) of corrupted data packets. However, if conditions are too poor or interference is too severe, the system may fail to successfully complete a data exchange even after a defined number of retries.
If the number of unsuccessful transmission attempts exceeds the protocol’s set limit, the system assumes the link is no longer viable and the connection is dropped (or times out). The operators must then manually try to re-establish the connection or move to a clearer frequency or different mode.
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