Condensed exam references for project management, cloud and networking certifications — the cheat sheets and formula tables training providers sell, free.
The five EC2 instance family categories — general, compute, memory, storage, accelerated — and how to read an instance name like m6g.xlarge.
IAM building blocks (users, groups, roles, policies), identity vs resource policies, the explicit-deny-wins evaluation rule, least privilege, and root-account best practices.
All S3 storage classes on one page — retrieval speed, minimum storage duration, availability zones and use case — for the AWS Solutions Architect exam.
VPC building blocks — subnets, internet/NAT gateways, route tables — and security groups (stateful) vs network ACLs (stateless), for the AWS certification exams.
The six AWS Well-Architected pillars — Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization, Sustainability — each with its design focus.
AWS databases by type — RDS & Aurora (relational), DynamoDB (NoSQL), ElastiCache (in-memory), Redshift (warehouse), DocumentDB and Neptune — and when to use each.
Azure's core services by category — compute, storage, networking, databases — each mapped to its AWS equivalent, for the AZ-900 exam.
The cyber attacks Security+ tests most — phishing, ransomware, MITM, DDoS, SQL injection, XSS, CSRF, brute force — each with its primary defense.
The TCP/UDP port numbers tested on Network+ and Security+ — FTP, SSH, DNS, HTTP, HTTPS, RDP and more — service, number and protocol in one table.
ITIL 4's seven guiding principles, four dimensions of service management, and the six service-value-chain activities — for the ITIL 4 Foundation exam.
Core Kubernetes objects (Pod, Deployment, Service, Ingress, ConfigMap…) and the cluster architecture (control plane vs worker nodes) — for KCNA/CKAD.
All 7 OSI layers — function, data unit (PDU), example protocols and devices — with mnemonics and the TCP/IP model mapping. For Network+, Security+ and CCNA.
Forward pass, backward pass, total float vs free float, and how to identify the critical path — the CPM scheduling math for the PMP exam, with a worked example.
Every earned value formula for the PMP exam: PV, EV, AC, CV, SV, CPI, SPI, EAC, ETC, VAC, TCPI — with meaning, interpretation, and a worked example.
The communication channels formula n(n−1)/2, the three communication methods, and the five conflict-resolution modes ranked best to worst — for the PMP exam.
The seven PMP procurement contract types — FFP, FPIF, FP-EPA, CPFF, CPIF, CPAF, T&M — and exactly who bears the cost risk in each.
Analogous, parametric, bottom-up and three-point estimating — when to use each — plus the triangular and beta (PERT) formulas and standard deviation, for the PMP exam.
The 5 process groups, 10 knowledge areas and the 49-process grid from PMBOK 6 — plus how PMBOK 7 shifted to principles and performance domains.
Cost of quality (conformance vs non-conformance), quality assurance vs control, and the seven basic quality tools — for the PMP exam.
The five threat responses and five mirror opportunity responses, qualitative vs quantitative risk analysis, and Expected Monetary Value (EMV) — for the PMP exam.
RAID 0, 1, 5, 6 and 10 compared — minimum disks, fault tolerance, usable capacity and best use — for Network+/Server+.
Scrum's 3 accountabilities, 5 events and 3 artifacts (with their commitments) per the 2020 Scrum Guide — for PSM and CSM exams.
The high-frequency CompTIA Security+ acronyms — CIA, AAA, PKI, SIEM, IDS/IPS, MITM, XSS and more — grouped by theme with one-line meanings.
CIDR prefixes to subnet masks, usable host counts per prefix, and the RFC 1918 private ranges — the subnetting table for Network+ and CCNA.
Symmetric (shared key — AES) vs asymmetric (key pair — RSA, ECC) encryption: algorithms, trade-offs, the hybrid model TLS uses, and how hashing differs. For Security+.
The Agile Manifesto's four values and a plain-English summary of its twelve principles — the foundation behind Scrum, Kanban and agile PMP content.