Skip to main content

Deep Dive into Cybersecurity: Security+ Level Knowledge Without the Certificate

📚 My Cybersecurity Learning Journey

Key Topics from a 17-Hour Security+ Course

🔹 CIA Triad Explained

Confidentiality: Ensuring that sensitive data is only accessed by authorized users. This is often achieved using encryption and access controls.

Integrity: Ensuring data is accurate and untampered. Techniques like hashing, checksums, and digital signatures help validate that data hasn't been altered.

Availability: Making sure systems and data are accessible when needed. Achieved through backups, redundancy, load balancing, and fault-tolerant design.

🔹 Types of Threats

  • Malware: Includes viruses, ransomware, worms, and trojans that compromise devices or networks.
  • Social Engineering: Manipulating users into giving up confidential info. Example: Phishing emails.
  • Insider Threats: Employees or contractors misusing access, accidentally or intentionally.
  • Advanced Persistent Threats (APTs): Long-term targeted attacks, often by well-funded threat actors.
  • Zero-Day Vulnerabilities: Exploits for unknown software bugs before a fix is available.

🔹 Networking Fundamentals for Security

Studied basic networking concepts: IP addressing (IPv4/IPv6), MAC addresses, ports, and protocols like TCP/UDP. Learned about the OSI model, and how each layer relates to security implementations. Gained insights into VLANs, VPNs, routers, switches, and secure architecture design.

🔹 Security Protocols

  • SSL/TLS: Secures web communication via encryption. TLS is widely used in HTTPS.
  • IPSec: Secures IP traffic, mainly used in VPNs for encrypted tunnels.
  • SSH: Secure Shell protocol for secure remote login and file transfers.
  • SFTP: Secure file transfer protocol using SSH.
  • WPA3: Wi-Fi Protected Access protocol for securing wireless networks.

🔹 Firewalls & Network Security

Understood how stateful firewalls track active connections and how stateless firewalls inspect packets individually. Learned about configuring ACLs, DMZs for isolating public-facing services, and NAT for IP address masking. Also studied IDS/IPS for threat detection and prevention.

🔹 Security Operations Center (SOC)

Learned how a SOC monitors and manages security posture using tools like SIEM (Security Information and Event Management). Understood the use of SOAR for automating incident response, and endpoint security solutions like EDR/XDR for managing threats on devices.

🔹 Threat Hunting & Threat Intelligence

Studied proactive threat hunting strategies — using indicators of compromise (IoCs), behavior analytics, and threat intelligence feeds. Learned how organizations gather and analyze threat data to understand attacker TTPs (Tactics, Techniques, Procedures) and prepare defenses accordingly.

🔹 Host Security

  • Anti-virus and anti-malware solutions
  • Regular patching to fix vulnerabilities
  • Host-based firewalls and secure configurations
  • OS hardening to remove unnecessary services and enforce strict permissions

🔹 Identity and Access Management (IAM)

  • MFA (Multi-Factor Authentication): Adds additional verification steps to improve login security.
  • SSO (Single Sign-On): One login grants access to multiple systems.
  • RBAC: Access based on user roles.
  • ABAC: Access based on attributes like department or or sensitivity of information.
  • LBAC: Access based on location .
  • Emphasized the Principle of Least Privilege and Separation of Duties to reduce risk.

🔹 AAA – Authentication, Authorization, Accounting

  • Authentication: Verifying identity (e.g., username & password, biometrics).
  • Authorization: Granting permissions based on identity (e.g., admin rights).
  • Accounting: Logging actions (e.g., login attempts, file access) for auditing.

🔹 Mobile Device Security

Learned about MDM (Mobile Device Management) tools for enforcing security policies. Topics included encryption, remote wipe, app whitelisting, and handling BYOD (Bring Your Own Device) risks with secure containers and user awareness.

🔹 Incident Response & Digital Forensics

Studied the full Incident Response (IR) lifecycle: Preparation → Detection → Containment → Eradication → Recovery. Learned forensic steps for evidence preservation: identification, collection, analysis, and documentation. Understood the importance of maintaining chain of custody for legal admissibility.

🔹 Cryptography

  • Symmetric Encryption (AES): Uses one shared key for encryption and decryption. Fast and efficient for large data.
  • Asymmetric Encryption (RSA): Uses public and private key pairs. Suitable for secure key exchange and digital signatures.
  • Hashing Algorithms (SHA-2, MD5): Provide data integrity by creating fixed-length representations.
  • Digital Signatures: Ensure data authenticity and integrity. Common in secure emails and documents.
  • PKI (Public Key Infrastructure): Framework for managing digital certificates and public keys.
  • TLS/SSL Handshake: A multi-step negotiation process to establish secure communication between a client and server using certificates and encryption keys.

🔚 Final Thoughts: Was It Worth It?

After completing the full CompTIA Security+ course on LinkedIn Learning (37 hours), I can confidently say it was absolutely worth it for anyone looking to build a solid foundation in cybersecurity.

The course covers a wide spectrum of essential topics—from understanding basic networking and threats to learning real-world concepts like incident response, cryptography, and security operations.

Even though it doesn’t offer a certification like the official CompTIA Security+ exam, the knowledge and clarity I gained were invaluable. The content was well-structured, beginner-friendly, and practical enough to help me grasp the real-world applications of cybersecurity concepts.

If you're someone looking to start your journey in cybersecurity, I highly recommend this course. It's an excellent way to get exposure to key domains and terminology used in the industry—before diving into more advanced certifications or practical labs.

Bottom Line: Great investment of time for beginners. Solid theoretical grounding, clear explanations

Labels:

Comments

Post a Comment

Please do not enter any spam link here.

Popular posts from this blog

How to Pass CompTIA Security+ SY0-701 in 2 Months (839 Score Breakdown + Resources)

How I Scored 839/900 on CompTIA Security+ SY0-701 — 2-Month Prep Strategy That Actually Worked Score: 839/900  |  Exam: CompTIA Security+ SY0-701  |  Prep Time: 2 Months  |  Total Questions: 76 (including 3 PBQs) I'm not going to sugarcoat it — CompTIA Security+ is not easy, but it is very passable with the right strategy. I cleared it with an 839 out of 900, and in this post I'll share exactly how I did it, domain by domain, so you can replicate the approach without wasting time. My 2-Month Study Plan Month 1 — Domain-by-domain study: Read, take notes, and build comparison tables and mnemonics for tricky concepts. Month 2 — Heavy practice testing: Full focus on practice tests and PBQ simulations. Time management drills every session. The biggest mistake people make is spending 90% of their time reading and only 10% practicing. I flipped that in month 2 — and it made all the difference. Domain 1 — General Security Concepts What to focu...
Post a Comment
Read more

Exploiting and Securing GitLab: Lessons from a TryHackMe Lab

Perimeter security isn’t enough—because sometimes the threat is already inside. In this blog post, I’m sharing what I learned from a hands-on TryHackMe lab on GitLab security . It revealed how a simple internal misconfiguration—like open registration or overly permissive repo access—can lead to major data exposure inside an organization. I’ll walk you through the red team perspective on exploiting a misconfigured GitLab instance , and then flip the script to explain how you can secure your own internal build systems . Scenario: Inside the Walls of a Large Organization Think of a large organization—like a bank—with thousands of employees and multiple teams handling development, IT operations, and security. To keep intellectual property (IP) secure, these organizations often host self-managed GitLab instances on their internal network. But here’s where things can go wrong: GitLab is hosted internally Allows anyone on the internal network to register Has some projects...
Post a Comment
Read more

Job Scams / Telegram Scams in India

Awareness is necessity Job scams and telegram scams have become a rampant issue in India, with many unsuspecting individuals falling victim to these fraudulent activities. These scams not only cause financial loss but also result in emotional distress and a loss of trust in online platforms. In this blog, we will discuss the ongoing job scam and telegram scam in India, and provide some tips on how to identify and avoid falling prey to these scams. The job scam in India has been on the rise, with scammers posing as recruiters or employers offering lucrative job opportunities. These scammers often target job seekers who are desperate for employment and are willing to take any opportunity that comes their way. They use fake job postings, promising high salaries and attractive benefits to lure in their victims. Once the victim is hooked, they are asked to pay a fee for processing their application or for other reasons. In reality, there is no job, and the victim en...
2 comments
Read more