Posts

Endpoint and Server Security for CompTIA SecurityX (CAS-005): EDR, Application Control, and Attack Surface Reduction

Domain 3.0, Security Engineering, carries the single heaviest weight on the CompTIA SecurityX (CAS-005) exam at 31% — and objective 3.2, endpoint and server security, is where a huge share of those questions live. CAS-005 does not test endpoint security as a beginner topic. It expects candidates who already passed Security+ to reason at an architect's level: how application control, EDR, SELinux, host-based firewalls, and mobile device management fit together into a layered defense, and how a skilled attacker tries to defeat each layer in turn. This guide walks through the CAS-005 3.2 sub-objectives in the order CompTIA lists them, then ties the layer together with the threat-actor tactics, techniques, and procedures (TTPs) the exam expects you to recognize on sight: injection, privilege escalation, credential dumping, unauthorized execution, lateral movement, and defense evasion. Application Control and Allowlisting Application control (also called application allowlisting or...
Post a Comment
Read more

Specialized and Legacy Systems Security for CompTIA SecurityX (CAS-005): OT, ICS, IoT, and Embedded Systems

CompTIA SecurityX (CAS-005) doesn't stop at servers, laptops, and cloud workloads. Objective 3.5, "Secure specialized and legacy systems," asks candidates to think about the machines that keep the physical world running: the programmable logic controllers on a factory floor, the HVAC controller on a hospital roof, the medical infusion pump, and the decade-old embedded appliance nobody wants to touch because touching it might shut down a production line. These systems rarely get patched, rarely get replaced, and almost never get a security review — which is exactly why CAS-005 treats them as their own exam domain rather than folding them into general endpoint security. This guide walks through operational technology, embedded and IoT devices, the wireless technologies that connect them, and the specific security and privacy considerations CAS-005 expects you to apply when a system can't simply be hardened the way a modern server can. Operational Technology: SCADA, ...
Post a Comment
Read more

Threat Hunting Rule Languages for CompTIA SecurityX (CAS-005): Sigma, YARA, Snort, and RITA Explained

Most threat hunting programs eventually run into the same wall: an analyst has a hypothesis, a log source, and no standard way to express the pattern they're looking for across tools that don't speak the same language. That's the problem detection rule languages solve. CompTIA's SecurityX (CAS-005) exam objective 4.3, Threat Hunting and Threat Intelligence, specifically calls out four of them by name: Sigma , YARA , RITA , and Snort . Candidates are expected to know what each one actually matches on, where it runs in the pipeline, and why security engineers maintain more than one. This guide works through all four, how they relate to the threat intelligence sharing formats covered elsewhere on this blog ( STIX and TAXII ), and how CAS-005 expects you to apply them during a hunt. Why CAS-005 Tests Rule Languages Specifically Security+ (SY0-701) and even CySA+ treat threat hunting mostly as a concept: work from a hypothesis, use behavioral baselines, escalate what y...
Post a Comment
Read more

Common Uses of Artificial Intelligence for CompTIA Tech+ (FC0-U71): Chatbots, Assistants, and Generative AI Explained

Artificial intelligence stopped being a niche topic the moment it showed up inside everyday operating systems, browsers, and office software — which is exactly why CompTIA added it to the Tech+ (FC0-U71) exam. Objective 3.5, "Identify common uses of artificial intelligence (AI)," sits inside the Applications and Software domain, worth 18% of the exam, and it expects candidates to recognize four specific categories of AI that show up in modern IT environments: chatbots, virtual assistants, generative AI, and AI-driven predictions and recommendations. This guide walks through each of those four categories the way Tech+ tests them — definitions, real-world examples, and the practical benefits CompTIA wants you to be able to articulate. It builds on the application and software concepts covered in our Operating Systems Fundamentals for Tech+ guide and pairs naturally with our Web Browser Features for Tech+ article, since many of today's AI assistants live inside the brow...
Post a Comment
Read more

Common Network Devices for CompTIA Tech+ (FC0-U71): Routers, Switches, Access Points, and Firewalls Explained

Every network, from a two-computer home office to a sprawling enterprise campus, is built from the same handful of hardware building blocks. CompTIA Tech+ (FC0-U71) Domain 2.0, Infrastructure, expects candidates to recognize these devices by name, know what layer of the network they operate at, and understand why you'd choose one over another. This is foundational vocabulary that carries straight through to A+ and Network+ , so getting it right now pays off on every exam that follows. This guide walks through the core network devices Tech+ wants you to know: hubs, switches, routers, wireless access points, modems, and firewalls, plus the all-in-one SOHO devices that combine several of these roles into a single box. We'll also connect each device to the common computing devices they support and the troubleshooting mindset you'll need when one of them fails. Hubs and Switches: Connecting Devices on a LAN A hub is the oldest and simplest connectivity device: it takes a ...
Post a Comment
Location: 3RWF3HWQ+RP
Read more

Third-Party and Supply Chain Risk Management for CompTIA SecurityX (CAS-005)

Nearly every enterprise breach retrospective these days turns up the same culprit somewhere in the chain: a vendor, a subcontractor, or an open-source dependency nobody was watching closely enough. CompTIA's SecurityX (CAS-005) exam treats this reality as core architecture work, not an afterthought bolted onto procurement. Objective 1.2, inside the Governance, Risk, and Compliance domain — worth 20% of the exam — asks candidates to "perform risk management activities" against a named set of organizational requirements, and third-party risk sits squarely inside that objective alongside supply chain risk, vendor risk, and subprocessor risk. This guide breaks down what SecurityX expects you to know about managing risk that lives outside your own network boundary, building on the enterprise architecture and operations concepts covered in our Zero Trust Architecture for CAS-005 guide and our look at Enterprise Data Loss Prevention strategies . Why Third-Party Risk Gets It...
Post a Comment
Read more

Software Licensing Concepts for CompTIA Tech+ (FC0-U71): Open Source vs. Proprietary, EULAs, and Subscription Models

Software licensing rarely gets the attention that hardware or networking topics do, but CompTIA puts it squarely inside the Security domain of the Tech+ (FC0-U71) exam, which carries a hefty 19% weight — the second-largest domain on the test. Objective 6.1 expects candidates to explain basic software licensing concepts, including open source versus proprietary models, end user license agreements (EULAs), product keys, and the difference between a one-time purchase and a recurring subscription. These concepts come up constantly in real IT work too: every time you install an application, renegotiate a renewal, or onboard a new employee's laptop, a licensing decision is sitting underneath it. This guide builds on the ideas introduced in our Security Fundamentals for CompTIA Tech+ article, which covers the CIA triad and AAA, and pairs naturally with our breakdown of Virtualization and Cloud Computing Fundamentals , since cloud services are almost always sold under subscription lic...
Post a Comment
Read more

Zero Trust Architecture for CompTIA SecurityX (CAS-005): Continuous Authorization, Microsegmentation, and Deperimeterization

CompTIA SecurityX (CAS-005) treats Zero Trust as far more than a buzzword. Objective 2.6, "Integrate Zero Trust concepts into architecture," sits inside the Security Architecture domain — worth 27% of the exam, the single heaviest domain on the test — and it expects candidates to reason about continuous authorization, context-based reauthentication, segmentation and microsegmentation, always-on VPN, asset attestation, security boundaries, deperimeterization, and subject-object relationships at an enterprise-architect level. This is a meaningful step up from the Zero Trust vocabulary tested on Security+ and Network+. This guide walks through each of those CAS-005 sub-concepts, building on the policy engine and policy administrator model from our NIST SP 800-207 breakdown and our Zero Trust Architecture primer . Why CAS-005 Pushes Zero Trust Further Than SY0-701 Security+ candidates need to recognize the Policy Decision Point / Policy Enforcement Point model and define ter...
Post a Comment
Read more

Storage Types for CompTIA Tech+ (FC0-U71): Volatile vs. Non-Volatile, Local and Network Storage Explained

Why Storage Types Matter on the Tech+ Exam CompTIA Tech+ (FC0-U71) Domain 2.0, Infrastructure, asks candidates to distinguish between the many kinds of storage a modern IT environment uses — from the volatile memory inside a running computer to the cloud buckets a business backs its files up to. This is one of those topics that looks simple on the surface but trips up new candidates because the exam likes to test the distinctions : volatile versus non-volatile, local versus network, and block versus file-level access. Get the categories straight and the specific device names (HDD, SSD, NVMe, NAS, SAN) fall into place naturally. This guide walks through every storage category Tech+ expects you to know, explains how each one is actually used in the field, and closes with exam-style scenarios so you can practice telling them apart. If you haven't already, it's worth reviewing the Computer Internal Components guide first, since storage is one of the six core components discussed...
Post a Comment
Read more

Enterprise Data Loss Prevention (DLP) Strategies for CompTIA SecurityX (CAS-005)

Enterprise Data Loss Prevention (DLP) is one of those CompTIA SecurityX (CAS-005) topics that sounds simple on the surface — "stop sensitive data from leaving the organization" — but turns into a scenario-heavy nightmare once the exam starts mixing in deployment models, detection methods, and integration points with CASB, SWG, and SASE. CAS-005 expects security architects to design DLP programs that scale across endpoints, networks, email, and cloud services, not just define the acronym. This guide walks through how enterprise DLP actually works, where it gets deployed, how it detects sensitive data, and what SecurityX wants you to recognize when a scenario question drops you into the middle of a DLP rollout or a tuning problem. What Enterprise DLP Actually Does At its core, DLP is a set of technologies and policies that identify, monitor, and control the movement of sensitive data — intellectual property, PII and PHI , financial records, source code — so it c...
Post a Comment
Read more

Device Connection Interfaces and Peripherals for CompTIA Tech+ (FC0-U71): USB, HDMI, Bluetooth, and NFC Explained

CompTIA Tech+ (FC0-U71) devotes nearly a quarter of the exam to the Infrastructure domain, and a large chunk of that domain comes down to one deceptively simple question: how do devices actually talk to each other and to the people using them? Candidates who can recite CPU specs or RAM types sometimes stumble when asked to pick the right cable for a 4K monitor or explain why a wireless mouse keeps dropping its connection. This guide walks through the wired and wireless connection interfaces Tech+ expects you to know, then covers the peripheral setup skills — printers, scanners, and monitors — that show up just as often on the real exam. Why Connection Interfaces Matter on the Tech+ Exam FC0-U71's Infrastructure objectives explicitly call out "device connection interfaces" alongside computing device types and internal hardware, which we covered in our guide to common computing devices and our breakdown of internal components . The exam is not asking you to become a cab...
Post a Comment
Read more