Other commonalities include functions, which are subroutines, arrays and other data structures, and variations on conditionals and loops. But this very basic introduction gives you some starting points to commence reading Perl code. Perhaps, with the exception of cryptography, no other area of computer security is as arcane as networking. Myriad acronyms dominate networking discussions. Problems often emerge at several levels of abstraction.
Security holes are often subtle, missing the attention of even experienced analysts.
Yet, every computer crime professional must have some grasp of networking, even though networking may not be the main focus of their work. Any computer crime may spill over into a network. If the article is a real head spin for you, it is time to do some networking study, which is nothing to be ashamed of. Realizing what you don't know is a healthy approach in this business. An attacker's server becomes the de facto ISP to the user's browser.