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Regular expressions (regex) provide a flexible way of searching for searching using many different tools and programming languages.
Understand how modern computer networks work.
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ARP helps us match IP addresses to hardware (MAC) addresses.
Learn how to match standard character classes with regular expressions.
Binary is just another way of counting. Instead of using base-10 (decimal), we use base-2 where each place value is a bit.
Block ciphers operate on blocks of data of a particular size.
Collision and broadcast domains are important properties of an Ethernet network.
DNS is used to resolve friendly names (e.g. www.example.com) to IP addresses (e.g. 1.2.3.4), making it vital to our use of the internet.