(Reuters) -An outage at Amazon’s cloud computing unit was gradually easing on Monday, after disrupting many online services offered by banks, social media companies and businesses.

The turmoil marked the largest internet disruption since last year’s CrowdStrike malfunction hobbled tech systems in hospitals, banks and airports. It highlights the vulnerability of the world’s interconnected technologies.

The cloud unit, Amazon Web Services, or AWS, has more than one million active customers every month and it currently spans 120 availability zones across 38 geographic regions, according to the company website.

Below are key details about the outage:

CAUSE OF ISSUE

The outage began when a problem with the Domain Name System prevented applications from finding the correct address for the D

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