CompTIA Security+ Ports and Protocols Cheat Sheet

Anyone researching Security+ ports and protocols eventually runs into the same question: what does Security+ actually demand? CompTIA’s current Security+ exam is SY0-701, launched on November 7, 2023. It is a single-exam certification priced at $425, capped at maximum of 90 questions, timed at 90 minutes, and scored on a 100–900 scale with 750 required to pass. That concrete structure is why advice for other certs often breaks down here.

Why do ports, protocols, and network controls show up so often on SY0-701?

CompTIA’s official Security+ page lists these five SY0-701 domains and weights: General Security Concepts — 12%; Threats, Vulnerabilities, and Mitigations — 22%; Security Architecture — 18%; Security Operations — 28%; Security Program Management and Oversight — 20%. Those weights matter. Security Operations is 28%, so hardening, monitoring, vulnerability management, IAM operations, and incident response get more exam space than any other area. Threats, Vulnerabilities, and Mitigations follows at 22%, then Security Program Management and Oversight at 20%, Security Architecture at 18%, and General Security Concepts at 12%.

CompTIA also places performance-based items prominently in the exam experience. CompTIA’s own Security+ exam article says most PBQs appear at the beginning of the exam, before you see the bulk of the multiple-choice items. That detail changes test strategy because the hardest simulation-style work often lands while the clock still shows a full 90 minutes. Security+ renewal is also specific: CompTIA requires 50 CEUs in a three-year cycle, or another approved renewal path, and publishes a three-year CE fee total of $150 for Security+.

What does network reasoning look like on the exam?

Security+ likes ports in context. Example: a user can open a secure website but cannot administer a Linux host remotely. HTTPS uses TCP 443, while SSH uses TCP 22. If a firewall policy allows 443 and blocks 22, browsing works but secure shell access fails. That is how port memorization becomes troubleshooting. DNS gives another example. Port 53 is normal for name resolution, but repeated unusual outbound DNS traffic can indicate tunneling or exfiltration. On the exam, you are rarely rewarded for memorizing “53” in isolation. You are rewarded for connecting 53 to a threat or a control.

Where does addressing or wireless security become a practical problem?

When Security+ touches subnetting, it expects practical math. A /24 network leaves 8 host bits because IPv4 has 32 total bits and 24 are reserved for the network portion. Two to the eighth power gives 256 total addresses. Subtract the network and broadcast addresses, and you have 254 usable hosts. A /26 leaves 6 host bits: 2^6 gives 64 addresses, so 62 are usable. If a PBQ asks whether a subnet can support 50 devices, a /26 works while a /27 does not.

Wireless questions usually combine standards and attack types. WPA2-Personal relies on a pre-shared key and is vulnerable to offline cracking if the passphrase is weak and the handshake is captured. WPA3 improves this by using SAE, which resists several offline guessing attacks more effectively. Evil twin access points, deauthentication abuse, and weak guest segmentation are the kind of practical threats that Security+ wants you to recognize in a scenario, not just define on flashcards.

Which items deserve fastest recall?

HTTPS 443
SSH 22
RDP 3389
DNS 53
LDAP 389 / LDAPS 636
SMB 445
NTP 123
Syslog 514
WPA2 versus WPA3 and why SAE matters

What should you do with this information next?

Treat Security+ as a weighted, scenario-driven exam rather than a generic cybersecurity quiz. Memorize the constants: SY0-701, $425, up to 90 questions, 90 minutes, 750 passing score, PBQs near the beginning, and the five domain weights. Then convert each domain into actions. Build a list of ports you can explain, not just recite. Walk through certificate trust step by step. Practice incident response as a sequence. Learn the difference between phishing, vishing, smishing, and whaling by modeling the attacker’s method. That is the level of specificity the exam rewards.

Our CompTIA Security+ study guide covers all five SY0-701 domains with domain-weighted practice questions, a performance-based question walkthrough, a ports and protocols cheat sheet, and a 6-week study schedule built around the exam’s actual content weighting. Available as an instant PDF download at securitypluscertprep.com/guide.

If you want to go further, SimpuTech’s Security+ AI tutor can walk you through practice questions, explain threat scenarios in plain language, and build a personalized study plan around your weak domains. Try it at SimpuTech.com.

Which Security+ facts should be on instant recall?

You should be able to say the current exam details without hesitation: the active exam code is SY0-701, the U.S. voucher price is $425, the exam runs for 90 minutes, the question count is capped at 90, and the passing score is 750 on a 100–900 scale. You should also know the five domain weights in descending order: Security Operations at 28%, Threats, Vulnerabilities, and Mitigations at 22%, Security Program Management and Oversight at 20%, Security Architecture at 18%, and General Security Concepts at 12%. Those numbers are not background information. They are the framework for deciding what deserves more review time and what deserves faster recall.

Another fact that changes behavior is PBQ placement. CompTIA’s Security+ exam article says most performance-based questions show up at the beginning of the exam. That means the first few minutes can be more interactive and slower-moving than many first-time candidates expect. A study approach that uses only passive reading tends to fail at that point because the exam asks you to classify, configure, prioritize, and interpret rather than simply define.

Which Security+ mistakes create avoidable losses?

The first mistake is treating every domain as equally weighted. On SY0-701, Security Operations is more than twice the size of General Security Concepts, so a study plan that splits time evenly is mathematically misaligned with the exam. The second mistake is memorizing terms without attaching them to a use case. Knowing that SSH is port 22 matters less than recognizing that a blocked 22 explains why secure Linux administration fails while HTTPS on 443 still works. The third mistake is mixing up control categories. When a question asks for the next step after identification, the answer lives in containment or eradication, not in a later lessons-learned meeting.

A fourth error is using outdated exam assumptions from SY0-601 forums or old YouTube playlists without checking the SY0-701 objectives. CompTIA’s current outline gives more explicit room to cloud security, zero trust, automation, and modern operational defense. If your prep material still feels anchored in older wording, verify it against the current objectives before relying on it.

How can you turn static notes into Security+ exam-ready knowledge?

Take one topic at a time and convert it into a scenario. For cryptography, do not stop at “AES is symmetric.” Add the next sentence: “AES is what I would expect for bulk data encryption after a secure key exchange.” For PKI, do not stop at “a CA signs certificates.” Walk the sequence: CSR, CA validation, certificate presentation, chain validation, hostname check, and revocation check. For social engineering, describe the attacker’s method, the log or user behavior that reveals the attack, and the control that interrupts it.

That approach works because Security+ is built around practical distinctions. Phishing and vishing are not the same merely because both steal credentials. Password spraying and credential stuffing are not interchangeable just because both target accounts. A /24 and /26 are not just mask values; they answer whether a branch office subnet can support the required number of devices. When you study through scenarios, answer choices narrow faster on exam day.