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DNS is one of the most fundamental technologies on the internet — and one of the most searched IT terms in South Africa. If you work in IT, run a website, or manage any SA business’s online presence, understanding DNS is essential.
DNS stands for Domain Name System. It is the internet’s phone book — a system that translates human-readable domain names (like schoolofit.co.za) into the numerical IP addresses (like 196.44.12.108) that computers use to find each other on a network.
When you type a website address into your browser, a DNS lookup happens invisibly in milliseconds before the page loads. Without DNS, you would need to memorise the IP address of every website you visit.
This entire process typically completes in under 50 milliseconds. Your device caches (temporarily stores) the result so it doesn’t have to repeat the lookup every time you visit the same site.
Maps a domain name to an IPv4 address. This is the most common DNS record. When you point your .co.za domain to your web hosting server, you set an A record.
Tells email servers where to deliver email for your domain. SA businesses setting up Google Workspace or Microsoft 365 email must configure MX records correctly or no email arrives.
Creates an alias from one domain name to another. Commonly used to point www.yourdomain.co.za to yourdomain.co.za, or to connect subdomains to external services.
Stores text information about a domain. Used for domain verification (Google, Microsoft), SPF records (email anti-spoofing), and DKIM records (email authentication). Critical for SA businesses preventing email spoofing.
Specifies which DNS servers are authoritative for your domain. When you register a .co.za domain, NS records point to your hosting provider’s or DNS provider’s name servers.
| Provider | Use in SA | Notable For |
|---|---|---|
| Cloudflare DNS (1.1.1.1) | Very widely used | Fastest public DNS, free, privacy-focused |
| Google Public DNS (8.8.8.8) | Extremely common in SA | Reliable, fast, free |
| AFRINIC | SA/African internet registry | Manages African IP address allocation |
| ZADNA / .co.za registry | SA domain registration | Manages the .co.za TLD namespace |
| Hetzner / Xneelo | Popular SA hosting providers | DNS management for .co.za domains |
DNS and cybersecurity in SA: DNS is a major attack vector. DNS spoofing (cache poisoning) redirects users to fake websites. DNS hijacking — where an attacker changes DNS settings — is used to intercept SA banking traffic. DNSSEC (DNS Security Extensions) adds cryptographic verification to DNS responses. SA IT professionals and cybersecurity practitioners need to understand DNS both to configure it correctly and to defend against DNS-based attacks, which are growing in frequency in South Africa.
DNS is a core topic in every major IT certification — CompTIA Network+, CompTIA Security+, Cisco CCNA, and Microsoft Azure Administrator all test DNS knowledge. SA network administrators, systems administrators, cloud engineers, and cybersecurity professionals all work with DNS daily. Understanding DNS is not optional in an IT career — it’s foundational.
Live 1-on-1 online networking training for SA professionals. CCNA, CompTIA Network+, and more — practical, flexible, start anytime.
Get an Instant QuoteCayden Godsell 15 September 2026 I just finished the Web and Software Engineer Master course, and its been a great experience. The online learning worked much better than i previously thought it would and the lessons with James were easy to understand, well structured and engaging. Would definitely recommend! Johandri Rossouw 23 July 2026 had an excellent experience with the School of IT. My lecturer was friendly, professional, and always willing to help. Communication was clear, classes were well organized, and I learned a lot throughout the course. I highly recommend the School of IT to anyone looking for quality online training. Thank you for a great learning experience! Tlotlego Lehabe 30 April 2026 I've had a wonderful lesson with full 1 on 1 lessons which gave me confidence in my career Nandipha Mpongoshe 22 April 2026 I had a great experience studying the Microsoft Azure Data Analysis course at School of IT. The course was well-structured and practical, with a strong focus on real-world application using tools like Power BI and Azure.
The instructors were knowledgeable and supportive, making complex concepts easy to understand. This course has significantly strengthened my data analysis skills and confidence in working with cloud-based solutions. Highly recommended for anyone looking to upskill in data analytics. Mikhe Bezuidenhout 23 January 2026 I found the content and course material very useful and user friendly. My lecturer did an outstanding presentation of the course contents. Can definitely highly recommend School of IT Michael Duvenhage 21 January 2026 The first Cybersecurity course was an excellent introduction to Cybersecurity and was explained properly. Danyella Camarena 4 January 2026 Had the most wonderful experience here! I learnt so much with my graphic design masterclass course - Carmel is wonderful and is an amazing teacher. 100% recommend!!!!!!!!!! Chantal Hamman 27 November 2025 I did the SQL Administrator Master Course through The School of IT in August 2025 and successfully completed my Microsoft Certified: Azure Database Administrator Associate exam with the help of the incredible team. Online sessions were scheduled to fit in with my available hours, as I'm working full time and the lecturers were amazing. Always available to assist and answer questions. Shaun assisted me with the preparation of the exam with the all the online learning material and manuals that I needed. I can definitely recommend School of IT!
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