Security+ Ports
If you’re planning to take the Security exam you should have a basic understanding of Security+ ports. Questions continue to appear in the Security+ exam.
There are 65,536 TCP and 65, 536 UDP ports. The first 1024 (0 to 1023) are well known ports and commonly used with default protocols. For example, the default port for HTTP is port 80 and the default port for HTTPS is 443.
 | Pass the First Time! |
Up-to-date Content
New multiple-choice and performance-based questions added regularly
Pass the first time with quality practice test questions, performance-based questions, flashcards, and audio.Buy The Full Access Study Package Today
60 Days Access
Need more time? You can easily renew for another 60 days at a significantly reduced price.
All materials are available online shortly after making your payment.
Get the Security+ Full Access Study Package Here
Our online Security+ study materials are the perfect complement to the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide. They can also be used to help ensure you’re ready no matter what study guide you’re using.
This exam is expensive.
Make sure you’re ready before exam day.
Here’s what you’ll get:- All of the multiple-choice questions from the best-selling CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide. See a demo here. All questions have full explanations so you’ll know why the correct answers are correct and why the incorrect answers are incorrect.
- Over 40 new multiple-choice questions we’ve added after publishing the study guide.
- Over 30 performance-based questions. See a demo here.
- All of the flashcards from the study guide. View them in any Web browser.
- All of the audio from the study guide. Listen to a sample here.
- Access to a free discount code for 10% off your Security+ voucher.
Buy The Full Access Study Package Today
60 Days Access
All materials are available online shortly after making your payment.
Understanding Port Usage
Here’s a short explanation of how the ports were used when you accessed this Web page. When you clicked a link for the blog, your computer created the request and put it into a packet with source and destination IP addresses and ports. The IP address of GetCertifiedGetAhead.Com (the destination) is 174.122.52.195 and since HTTP is used, the destination port is 80.
Your computer then identified an unused port in the dynamic and private port range (49,152 to 65,535) and mapped it to your Web browser for this request. For this explanation, imagine that it picked 49,152. Additionally, imagine that your computer (the source) has an IP address of 74.86.130.70. Here’s what we have:
- Destination IP: 174.122.52.195 (the GetCertifiedGetAhead.Com server)
- Destination Port: 80
- Source IP: 74.86.130.70 (the client’s system)
- Source Port: 49152
Another way of looking at the destination port from the client’s perspective is that it is an outgoing port. If you want to block outgoing HTTP traffic, you can block port 80 at your network firewall. On the other hand, the source IP is an incoming port from the server’s perspective. If you want to block incoming HTTP traffic, you can block incoming port 80.
TCP/IP then used the destination IP to get the packet to the GetCertifiedGetAhead.Com Web server. When the server received the packet, it looked at the destination port (80) and sent the packet to the service handing the HTTP protocol (the Web server application).
The Web server formatted the Web page, and sent it back to your computer. In this case, the destination IP addresses and ports are swapped and would look like this:
- Destination IP: 74.86.130.70 (the client’s system)
- Destination Port: 49152
- Source IP: 174.122.52.195 (the GetCertifiedGetAhead.Com server)
- Source Port: 80
TCP/IP used the destination IP to get the packet back to your system. When the packet arrived, your system looked at the destination port and saw that it is mapped to your Web browser. It then forwarded the packet to your Web browser to display. Of course, the Web page may have been sent in several packets, but each packet used the same process.
| Pass the First Time! |
Up-to-date Content
New multiple-choice and performance-based questions added regularly
Pass the first time with quality practice test questions, performance-based questions, flashcards, and audio.Buy The Full Access Study Package Today
60 Days Access
Need more time? You can easily renew for another 60 days at a significantly reduced price.
All materials are available online shortly after making your payment.
Get the Security+ Full Access Study Package Here
Our online Security+ study materials are the perfect complement to the CompTIA Security+: Get Certified Get Ahead: SY0-601 Study Guide. They can also be used to help ensure you’re ready no matter what study guide you’re using.
This exam is expensive.
Make sure you’re ready before exam day.
Here’s what you’ll get:- All of the multiple-choice questions from the best-selling CompTIA Security+: Get Certified Get Ahead: SY0-601 Study Guide. See a demo here. All questions have full explanations so you’ll know why the correct answers are correct and why the incorrect answers are incorrect.
- Realistic SY0-601 Security+ Practice Test Questions
- Performance-based questions.
- All of the flashcards from the study guide. View them in any Web browser. See demo here
- All of the audio from the study guide.
- Access to a free discount code for 10% off your Security+ voucher.
Buy The Full Access Study Package Today
60 Days Access
All materials are available online shortly after making your payment.
Know These Security+ Ports
Ports are used the same way for multiple services. Some of the common ports you should know are:
Remember, you can memorize these ports and then write them down as you start the test. If you get any port questions, you only need to look down at your notes to answer the question.
Here’s another link on Security+ ports that breaks down the ports in different categories and also identifies if they use TCP or UDP.
Hello, came across your blog just. I am in Africa preparing for the SEC401 exam , USUALLY STUDY MATERIAL IS SCARCE FOR SUCH COURSES. I will definately make use of all the informatiom here.
If I recall correctly, there was a question regarding the DHCP port UDP 67-68 on the exam.
Yes. Here’s a link to a more recent blog on Security+ ports: https://blogs.getcertifiedgetahead.com/understanding-ports/
It shows DHCP and also identifies if they are using TCP or UDP. These are valuable to know for the performance based questions.