Networking Protocols for Certification

By Bob Weiss and ChatGPT

Learning about networking protocols, and their importance and uses in the communications between two computers across some sort of network media, is at the center of many IT and cybersecurity certifications.  The goal of this article is to provide a list of networking protocols that you need to know for your exam and for a future career in IT, networking, or cybersecurity..

Networking protocols are a crucial component of the modern Internet. They are responsible for ensuring that data can be sent between different devices and networks in a reliable and efficient manner. One of the most widely used networking protocol stacks is the TCP/IP protocol stack, which is used by most of the devices that are connected to the Internet today.

At the heart of the TCP/IP protocol stack are two main protocols: the Transmission Control Protocol (TCP) and the Internet Protocol (IP). The TCP protocol is responsible for breaking data down into small packets that can be sent across the network, and then reassembling those packets into the original data at the receiving end. The IP protocol, on the other hand, is responsible for routing those packets between different devices and networks. Together, TCP and IP form the backbone of the modern Internet, and understanding how they work is essential for anyone interested in cybersecurity or network engineering.

Here are a list of other networking protocols you will need to learn for many IT and cybersecurity certification exams.

FTP – File Transfer Protocol : Port 21

SSH – Secure Shell : Port 22

Telnet – Port 23

SMTP – Simple Mail Transfer Protocol : Port 25

DNS – Domain Naming System (or Service) : Port 53

HTTP – Hypertext Transfer Protocol : Port 80

POP3 – Post Office Protocol : Port 110

IMAP – Internet Message Access Protocol : Port 143

HTTPS – HTTP Secure : Port 443

RDP – Remote Desktop Protocol : Port 3389

TCP – Transmission Control Protocol

UDP – User Datagram Protocol

ARP – Address Resolution Protocol

RARP – Reverse ARP

DHCP – Dynamic Host Configuration Protocol : Server Port 67, Client Port 68

MTP – Media Transfer Protocol

SFTP – Secure File Transfer Protocol

SSL – Secure Socket Layer

TLS – Transport Layer Security

E6 – Ethernet globalization protocols

NTP – Network time protocol

PPP – Point to Point Protocol

NNTP – Network News Transfer Protocol

QOTD – Quote Of The Day

Bitcoin Protocol – Protocol for Bitcoin transactions and transfers on the web

ICMP – Internet Control Message Protocol

IGMP – Internet Group Management Protocol

GGP – Gateway-to-Gateway Protocol

IP-in-IP – IP in IP (encapsulation)



About the Author:

I am a cybersecurity and IT instructor, cybersecurity analyst, pen-tester, trainer, and speaker. I am an owner of the WyzCo Group Inc. In addition to consulting on security products and services, I also conduct security audits, compliance audits, vulnerability assessments and penetration tests. I also teach Cybersecurity Awareness Training classes. I work as an information technology and cybersecurity instructor for several training and certification organizations. I have worked in corporate, military, government, and workforce development training environments I am a frequent speaker at professional conferences such as the Minnesota Bloggers Conference, Secure360 Security Conference in 2016, 2017, 2018, 2019, the (ISC)2 World Congress 2016, and the ISSA International Conference 2017, and many local community organizations, including Chambers of Commerce, SCORE, and several school districts. I have been blogging on cybersecurity since 2006 at

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