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One of the most critical situations in all world in 2020 year is the Covid-19 pandemic. All areas of society have colapsed due to the quarantine declared in several countries. One of the most important infrastructure resources in this situation is the Internet service because people have to work and study from home and such people connections have performed by Internet. Thus, Internet Service Providers had to endure increased traffic. In this paper, an analysis of Internet traffic over ISPs at Colombia was performed to understand what happened over such networks. Also, an estimate was made of the increase in network resources by means of a Closed Queued Network model. Results shows that Internet traffic increased for almost all operators with a percentage mean of 29.76 in March and 51.54 in April, and besides, network resources increased in a percentage near to 28.3 in March and 32.71 in April. [ABSTRACT FROM AUTHOR]