Citing the serious need for effective communication among first responders in case of a terrorist attack, Buckman also urged the committee to direct the Federal Communications Commission, as well as the Pentagon, to free up radio frequencies in order for all the agencies to better communicate.

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When engaged in a conflict, emotions run high and people generally defend their best interests, which often feels like an attack and perpetuates a rigidly antagonistic line of communication.

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Using the handle Flashboy, Ternovskiy soon mastered the art of the denial-of-service attack, wherein a target system is paralyzed by a mass of incoming communication requests.

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The previous attack involved a mast which formed part of Northern Ireland Electricity's (NIE) communication system.

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South Korea's communication watchdog said the attacks were caused by malicious code, but it didn't have any evidence linking the attack to North Korea.

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