Could pinging bring down an entire server, 6-7 days after the ping was ran

The ping was ran on thursday it sent 10000b of information at a time and overflowed the server slowing it down signifigantly. It was done at a school, and it did slow it down signifigantly. Then on next wednesday or thursday afternoon the internet began acting funny. The teacher and student accounts could not access the internet but admins could. Could a ping attack cause this. By the end of today it was complete server down, is it at all possible the ping attack from the week before was what caused it?