LPI 020-100 Real Exam Dumps [July 2026 Update]

Forty questions in sixty minutes sounds like the most approachable security certification available, and in many ways it is. The LPI Security Essentials (020-100) carries lifetime validity, has no prerequisites, costs less than most competing entry-level security exams, and is designed for people who want to demonstrate foundational security knowledge without committing to an intensive technical certification path. What makes it worth taking seriously is exactly what makes it surprisingly test-able: the exam covers five security domains with the breadth of someone who needs to make informed daily security decisions, not the depth of a specialist. A question about password hashing and salting sits next to a question about RFID card handling. A question about VPN selection appears in the same exam as a question about browser fingerprinting. The width of coverage across Security Concepts, Encryption, Device and Storage Security, Network and Service Security, and Identity and Privacy means that no single domain can be neglected, even though each individual topic within those domains is tested at a foundational level.

The LPI Security Essentials (020-100) is issued by the Linux Professional Institute (LPI) and is part of their Essentials certification track alongside Linux Essentials and Web Development Essentials. Unlike most security certifications, the 020-100 certificate carries lifetime validity and requires no renewal. No prerequisites are required; the exam is suitable for students, IT support staff, and professionals in any role who want to demonstrate they understand how to protect their data, devices, accounts, and online presence. The exam contains 40 questions and must be completed in 60 minutes, delivered through Pearson VUE.

Cert Empire’s 020-100 practice questions cover all five LPI Security Essentials topic areas at the breadth and applied decision level the real exam uses: not just knowing that encryption exists, but knowing when to use symmetric versus asymmetric and what each protects.

Exam Snapshot

Five Topic Areas: What the 020-100 Exam Tests

Topic 021: Security Concepts

This topic establishes the foundational vocabulary and mental model for the entire exam.

Goals, roles, and actors: Understanding who performs which security roles (administrators, security personnel, end users), who the threat actors are (black hat hackers seeking unauthorized access, white hat security researchers, script kiddies using existing tools without deep knowledge), and what the common goals of attacks are: data theft, system disruption, financial fraud, and industrial espionage.

CIA Triad: Confidentiality (information accessible only to authorized parties), Integrity (information is accurate and unmodified), Availability (systems and data accessible when needed). The exam tests which CIA component is violated by specific attack types and protective measures.

Risk concepts: Risk = likelihood of threat × impact of harm. Risk assessment identifies what could go wrong, how likely it is, and how severe the consequences would be. Vulnerability: a weakness that can be exploited. The exam tests the difference between a threat (a potential danger) and a vulnerability (the weakness that a threat could exploit).

Incident classification: Different types of security incidents have different appropriate responses. The exam tests how incidents are classified and what the basic steps of incident response look like from a non-specialist perspective.

Information Security Management Systems (ISMS): The ISO 27001 framework for systematically managing information security risks across an organization. The exam tests awareness of ISMS principles without requiring deep implementation knowledge.

Ethical behavior: Responsible disclosure of vulnerabilities (informing vendors rather than publicly disclosing or selling vulnerabilities), handling confidential information responsibly, and understanding the professional and legal implications of security roles.

Using digital resources responsibly: Evaluating the credibility of online information (checking source reputation and whether information can be verified by independent sources), understanding how personal activity online creates a digital footprint, and recognizing that individual security decisions affect not just the individual but also others sharing the same systems or networks.

Topic 022: Encryption

Symmetric vs. asymmetric encryption: Symmetric encryption uses a single key for both encryption and decryption. It is fast and suitable for bulk data encryption. Examples: AES (Advanced Encryption Standard), 3DES. The key distribution problem: both parties need the same secret key, but how do you share it securely? Asymmetric encryption uses a public/private key pair. The public key can be freely shared; data encrypted with the public key can only be decrypted with the private key. Used for key exchange and digital signatures. Examples: RSA, Elliptic Curve Cryptography (ECC). The exam tests when each type is used and what the practical difference is.

Hashing: A one-way function that produces a fixed-length output (digest) from any input. The same input always produces the same hash; even a small change to the input produces a completely different hash. Used for verifying data integrity (comparing a downloaded file’s hash against the published hash confirms the file was not tampered with) and for storing passwords. Hashing is not encryption: you cannot reverse a hash to obtain the original input. MD5 and SHA family are common hashing algorithms.

Password hashing and salting: Passwords in databases should be stored as hashes, not plaintext or reversible encryption. A salt (a random value added to the password before hashing) prevents two users with the same password from having the same hash and makes precomputed rainbow table attacks ineffective. The exam tests that passwords are stored using hashing with salting, not as base64 strings, not as plaintext, and not as reversible encryption.

Digital signatures and certificates: A digital signature uses the signer’s private key to produce a hash of a document that can be verified using the signer’s public key. If the document changes, the signature verification fails. Digital certificates bind a public key to an identity, verified by a Certificate Authority (CA). HTTPS uses TLS certificates to establish encrypted, authenticated web connections.

Email encryption: S/MIME and PGP (Pretty Good Privacy) provide end-to-end email encryption. S/MIME uses certificate infrastructure. PGP uses a web of trust model. Both encrypt the email body so that only the intended recipient can read it. The exam tests the basic concepts and when email encryption is appropriate.

VPN and network encryption: VPNs (Virtual Private Networks) encrypt network traffic between a device and a remote network, protecting data in transit from interception. The exam tests when a VPN is appropriate (remote access to corporate resources, using untrusted Wi-Fi networks) and why an organization-specific VPN is preferable to a consumer VPN for work purposes.

TOR and anonymization: The Onion Router (TOR) provides anonymization by routing traffic through multiple encrypted hops, making it difficult to trace the origin. The exam tests basic TOR concepts and the distinction between privacy (not sharing your identity) and anonymization (making your identity untraceable).

Topic 023: Device and Storage Security

Hardware components and security: Understanding the major components of a computer (CPU, RAM, storage, network interface) at the level needed to understand physical access risks. Physical access to a computer typically means complete access to its data if the storage is not encrypted.

USB and removable media security: USB devices can be used for data exfiltration (copying data onto a thumb drive) or for attack (USB devices that masquerade as keyboards and execute malicious commands when plugged in). The exam tests the security risks of USB devices and why organizations restrict or audit USB port usage.

Bluetooth security: Bluetooth pairing, the security risks of discoverable Bluetooth mode, and Bluetooth attack types (bluejacking, bluesnarfing). The exam tests why Bluetooth should be disabled when not in use.

RFID security: Radio Frequency Identification cards used for building access and contactless payments. RFID skimming (reading card data without physical contact) is a security concern. The exam tests responsible behavior when encountering lost RFID cards (report to building security, do not use or keep) and basic RFID security awareness.

Internet of Things (IoT) security: IoT devices (smart home devices, industrial sensors) often have weak default security configurations and infrequent firmware updates. The exam tests the security implications of IoT devices on networks.

Storage encryption: Encrypting storage protects data if a device is lost or stolen. Full disk encryption (BitLocker on Windows, FileVault on macOS, LUKS on Linux) makes the drive unreadable without the encryption key. The exam tests when storage encryption should be used and what it protects against.

Cloud storage security: Cloud storage introduces dependency on network connectivity and third-party security practices. The exam tests awareness of cloud-specific risks: data stored outside organizational control, dependence on internet connection, and the need to understand the cloud provider’s security practices.

Backups: Backups protect against data loss from hardware failure, ransomware, accidental deletion, and disaster. The exam tests backup types (full, incremental, differential), the importance of testing backups by restoring them, and the 3-2-1 backup rule (3 copies, 2 different media types, 1 offsite).

Topic 024: Network and Service Security

Firewalls: Network firewalls filter traffic based on rules (source/destination IP, port, protocol). The exam tests what firewalls can and cannot do: they block or allow traffic based on rules but cannot inspect encrypted payload content without additional capabilities.

Network segmentation: Dividing a network into segments (VLANs, subnets) limits the blast radius of a security incident. If one segment is compromised, the attacker cannot automatically access other segments. The exam tests the security benefit of network segmentation.

DNS and web service security: DNS is the system that translates domain names to IP addresses. DNS poisoning (returning false IP addresses to redirect users) is a DNS attack. HTTPS secures web communication using TLS. The exam tests the difference between HTTP and HTTPS and why HTTPS is required for secure web communications.

Network scanning and vulnerability assessment: Port scanning identifies which services are running and accessible on a system. Vulnerability scanning identifies known weaknesses. Penetration testing attempts to exploit vulnerabilities to assess real-world risk. The exam tests these concepts at the awareness level.

Open-source intelligence (OSINT): Gathering information from publicly available sources (search engines, social media, public databases) that attackers use for reconnaissance and defenders use for threat intelligence. The exam tests what OSINT is and why public information about systems and individuals represents a security risk.

Remote access security: SSH (Secure Shell) for encrypted remote command-line access to Linux/Unix systems. The exam tests SSH as the secure alternative to unencrypted protocols like Telnet.

Topic 025: Identity and Privacy

Authentication methods: Password-based authentication (something you know), multi-factor authentication combining password with a physical token or biometric. Strong passwords: long, complex, unique per service. Password managers for managing unique passwords across many services.

Social engineering and phishing: Manipulating people into revealing information or performing actions through deception. Phishing: fraudulent emails pretending to be legitimate organizations to steal credentials. Spear phishing: targeted phishing against specific individuals. The exam tests how to recognize phishing attempts (unexpected urgency, requests for credentials, mismatched sender domains).

Privacy protection: Personal data is increasingly collected, stored, and shared by online services. The exam tests the importance of understanding what data online services collect, what privacy settings are available, and why sharing personal information with untrusted services creates risk.

Browser security: Browser fingerprinting is the use of unique browser configuration details (installed plugins, screen resolution, fonts, settings) to identify a browser without cookies. The exam tests browser fingerprinting as a privacy concern distinct from cookies.

Identity theft and data breaches: What happens when credentials or personal information is stolen. Steps to take if an account is compromised: change the password immediately, enable MFA, review account activity, and notify the service provider.

Liability and legal concepts: Basic awareness of legal concepts related to security: liability (legal responsibility for harm caused by a security breach), copyright, and the concept of due care (taking reasonable steps to protect systems and data). The exam tests awareness, not legal expertise.

What to Expect on Exam Day

• 40 questions in 60 minutes: 90 seconds per question.
• Format includes both multiple-choice (select one correct answer) and fill-in-the-blank questions.
• Questions are scenario-based: “You are in situation X. What is the correct action?” rather than “Define term Y.”
• Topics span all five Security Essentials areas. No topic area can be ignored.
• Pass/fail status available immediately from Pearson VUE. Certificate available as PDF download through your LPI account.

5 Study Tips for LPI 020-100

• Tip 1: Study symmetric vs. asymmetric encryption with specific examples of when each is used. The exam tests both the concept and the practical application (HTTPS uses asymmetric for key exchange then symmetric for session data; password storage uses hashing, not encryption).
• Tip 2: Memorize the correct answer to “how are passwords stored in online services?” as hashing with salting. This is a direct exam question with specific incorrect options that are commonly confused (base64 encoding, reversible encryption, plaintext).
• Tip 3: Study USB, Bluetooth, and RFID security at the behavioral level: what to do when you find an RFID card (report it), why you should disable Bluetooth when not using it, why USB drives from unknown sources should never be plugged in.
• Tip 4: Know what to do first when you suspect unauthorized access to your computer: disconnect from the internet. Not reboot, not delete files, not run a scan. Disconnect first to prevent further data exfiltration before doing anything else.
• Tip 5: Practice with Cert Empire’s LPI 020-100 practice questions under timed 60-minute sessions with all five topic areas covered proportionally to build the breadth of security knowledge the real exam tests.

Best Study Resources

• Cert Empire LPI 020-100 practice questions PDF and practice simulator (2026 edition).
• Official LPI Security Essentials objectives (lpi.org/our-certifications/exam-020-objectives).
• “LPI Security Essentials Study Guide: Exam 020-100” by David Clinton (Wiley/Sybex).
• Dion Training: LPI Security Essentials (020-100) practice exam.
• LPI Security Essentials learning materials at lpi.org.

Career Opportunities After LPI 020-100

• IT Support Technician (Security-Aware)
• Help Desk Analyst
• Junior Systems Administrator
• Security Awareness Trainer
• End User Computing Specialist
• Student entering IT or cybersecurity programs

The LPI Security Essentials is widely used as: an entry-level credential for IT support roles, a stepping stone before CompTIA Security+ or other intermediate security certifications, a security awareness credential for non-technical professionals in regulated industries, and a baseline certification for high school and college students building toward security careers.

Why Candidates Choose Cert Empire for LPI 020-100 Preparation

✔ All five topic areas covered with scenario-based applied questions. Our 020-100 practice questions present real-world security situations: you found an RFID card, you suspect unauthorized access, you are configuring cloud storage, you are evaluating password storage methods. These are the applied judgment scenarios the real LPI exam uses.

✔ Encryption concept questions that distinguish hashing from encryption. We test symmetric vs. asymmetric, hashing vs. encryption, and password salting logic at the precision the real exam requires, including the specific wrong-answer distractors (base64, reversible encryption) that the LPI exam uses to test the distinction.

✔ Privacy and identity questions at daily-decision depth. We test browser fingerprinting vs. cookies, phishing recognition signals, and the correct first action when you suspect unauthorized access.

✔ Practice under real exam conditions with the Cert Empire Exam Simulator. Our 020-100 simulator runs 40 questions in 60 minutes with topic-level performance tracking across all five LPI Security Essentials topic areas.

✔ Instant access, 90-day free updates, and 24/7 support. As LPI updates the 020-100 exam objectives, your materials update automatically. Our support team is available around the clock.

✔ Backed by a full money-back guarantee. If our practice questions do not help you pass, we refund your purchase with no conditions.

FAQS

What is the LPI Security Essentials 020-100 certification?

The LPI Security Essentials (020-100) is an entry-level security certification from the Linux Professional Institute. It validates foundational knowledge of security concepts, encryption, device and storage security, network security, and identity and privacy. It carries lifetime validity and requires no prerequisites.

How many questions are on the 020-100 exam?

40 questions in 60 minutes, combining multiple-choice and fill-in-the-blank formats.

Does the LPI Security Essentials certificate expire?

No. The LPI Security Essentials certificate carries lifetime validity and requires no renewal fees or continuing education credits. This is uncommon for security certifications.

What are the prerequisites for LPI 020-100?

There are no prerequisites. Anyone can take the exam.

How are passwords correctly stored according to the LPI Security Essentials exam?

Using password hashing with salting. A unique random salt is added to each password before hashing, preventing rainbow table attacks and ensuring that two users with the same password produce different hash values in the database. Plain text, base64 encoding, and reversible encryption are all incorrect.

What is the difference between symmetric and asymmetric encryption?

Symmetric encryption uses one shared key for both encryption and decryption (e.g., AES). It is fast and suited for encrypting bulk data but requires secure key distribution. Asymmetric encryption uses a public/private key pair (e.g., RSA). The public key can be freely shared; only the matching private key can decrypt. Used for key exchange and digital signatures.

Related Certifications Worth Exploring

Candidates who pass the LPI Security Essentials and want to advance toward professional security credentials will find our CompTIA Security+ exam questions page covers the intermediate vendor-neutral security certification that builds directly on the foundational knowledge the LPI 020-100 validates. For those in the LPI ecosystem pursuing further Linux credentials, our LPI Linux Essentials (010-160) exam questions page covers the parallel Linux foundation credential that complements the security focus of the 020-100.