This the latest installment in my series of blog posts on TCP/IP and based on what I learnt from a video course by Infinite Skills. SMTP which stands for simple mail transfer protocol & POP 3 which stands for post office protocol are the 2 main protocols used with e-mail. If you do a capture in wireshark you will often see SMB or sender message block. These transfer text and convey file information and are very common on most computers. Website addresses are normally conveyed in HTTP or DNS, both of which convert the URL into something the computer can understand. There is also something called TLS which the part of the website address that is something like .com or .net. Most countries have there own add on bits to the website address similar to .com. TCP/IP is a very old protocol developed for use on the Arpanet etc and probably because the military developed it, it's very resilient and still in use despite many changes. TCP/IP is very much the most used protocol on networks and individual computers. I remember if you had to install a modem on a NT4 operating system you had to install TCP/IP on the system before.
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