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Java™
by example!
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How do I connect to the echo port (7)?
The echo port 7 will return a datagram that contains the exact contents of what was sent to it.
On many systems, this port is being disabled, fearing hackers may use it to perform a denial-of-service attack of some sort.
Just open a socket and write a line. If the port is enabled, the return will be the exact line.
EchoClient.java:
java EchoClient www.compapp.dcu.ieoutputs:
Further Information
Author of answer: Joris Van den Bogaert
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