[dismay]

Not sure where to post this, but could anyone breakdown this command?

note, these are not real IP addresses



How did the get the values of 99 99 00 00?

Here was the write-up to solve this problem, but I still can't see how 99x2 and 0x2 came into play,
here is the write up


What should I research to understand this? Has anybody had experience in Netcat?

Here are the full write ups https://www.cyberchallenge.com.au/pdf/Cy...utions.pdf (Page 19)