| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that a link abnormality can not be detected when a physical link failure can not be detected and to solve the problem of depending upon the type of a device of a communication object in order to detect the link fault. <P>SOLUTION: A communication apparatus 1 transmits data in which a first address showing a communicating part 10 to be used for communication with a network is made a destination and a second address different from the first address is made a transmission source from a communicating part 10 to a network, and receives data returned from the network to the communicating part 10. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
