where would a proxy server be located in a network
Proxy server A proxy server may reside on the user's local computer, or at various points between the user's computer and destination servers on the Internet.
Web server Apache, IIS and Nginx are the most used web servers on the Internet.
ARPANET The original IMPs and TIPs were phased out as the ARPANET was shut down after the introduction of the NSFNet, but some IMPs remained in service as late as July 1990.[52][53]
Denial-of-service attack A wide array of programs are used to launch DoS-attacks.