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Top 5 Critical CVEs of August 2026: What Network Engineers Must Patch This Week
CISA KEV added 9 exploited vulnerabilities in August 2026. The 5 critical CVEs to patch first, with CVSS scores, EPSS data, and exact fix...
Subnetting Practice Questions: 50 Problems With Worked Solutions
50 free subnetting practice questions with full worked solutions, not just answers. Covers masks, network and broadcast, VLSM, summarisation, and...
Single Mode vs Multimode Fiber: Full Comparison
A team once ran 2km of multimode fibre between two buildings. The link never came up clean. They blamed the switches, the transceivers, even the weather. The real problem? Wrong fibre. Multimode dies long before 2km, and no amount of swapping optics fixes a physics limit. That single mistake cost them a weekend and...
Network+ Practice Test 2026: 200+ N10-009 Questions With Explained Answers
Free Network+ practice test built for N10-009 only. 40 exam-style questions with explained answers across all 5 domains, plus a 200+ question...
Splunk Certification Cost in 2026: Exam Fees, Retakes and the Real Total
Splunk certification cost is $130 USD per exam attempt in 2026. See fees by level, retake rules, official training prices, and how to cut the total...
AZ-104 Certification: 2026 Exam Changes, Exam Cost and Study Plan
The AZ-104 exam costs $165 USD in the United States. You already knew that, because Google put it above the results before you clicked anything. Here’s what the answer box leaves out. Fail twice and Microsoft locks you out for 14 days. Fail five times and you’re barred from the exam for a full...
AWS Certification Exam Cost in 2026: Every Exam Priced
The sticker price of an AWS exam is $100 to $300. The number you actually pay? Usually closer to double. That gap is where most people get caught. They budget one exam fee, then a failed attempt, a practice test bundle, sales tax, and a recert three years out quietly turn a $150 plan...
VLAN vs Subnet: What’s the Difference? (2026 Guide with Diagram)
A VLAN and a subnet are not the same thing, and most people mix them up because in a healthy network they almost always show up together. Here’s the short version. A VLAN is a Layer 2 concept. It splits a physical switch into separate broadcast domains. A subnet is a Layer 3 concept....
Wazuh Agent: How to Install and Enroll It (2026 Guide)
Your agent package installed clean. No errors. You open the dashboard, expecting to see the new endpoint light up green. Instead? “Never connected.” Grey dot. Nothing. Sound familiar? You’re not alone. Nine times out of ten, the install worked fine. The problem is enrollment, the step most guides gloss over in one line. That’s...
Fortinet NSE Certification Overhaul July 2026: What Changes for NSE4/FCP
Here’s the short version: on 2026-07-15, Fortinet retires the FCF, FCA, FCP, FCSS, and FCX certification names and brings back the classic NSE levels, now expanded from 5 tiers to 8. If you hold an active FCP, you don’t lose anything. Fortinet maps it to the matching NSE certification automatically, with the same expiry...
