A、SQLCODE in an On-Error trigger.
B、SQLCODE in an exception handler.
C、DBMS_ERROR_CODE in an On-Error trigger.
D、DBMS_ERROR_CODE in an exception handler.
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A、 policy based routing （PBR） B、 unicast reverse path forwarding （uRPF） C、 lock and keyACL D、 RFC 1918filtering E、 IP source routing
A、Standard encoding techniques create an uncompressed digital data rate of 4000 bps. B、Standard encoding techniques create an uncompressed digital data rate of 8000 bps. C、Standard encoding techniques create an uncompressed digital data rate of 64，000 bps. D、Voice quality is not a concern if compression is not used. E、Two methods of quantization are linear and logarithmic. F、Two methods of compression are u-law and a-law.
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