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How to Never Fail an IT Exam Again
Failing IT Exams Sucks I never forget my first attempt at the Cisco CCNA exam back in 2000. I'd spent weeks studying from a big-name study guide. I had to pay for the exam fees out of my own money and I didn't have much at the time. When I took the exam my mind…
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CASP+ Certification – Everything You Need to Know
The CompTIA CASP+ Certification CompTIA recently updated its CASP+ exam topics from the third to fourth iteration. The actual exam code is CAS-004 and should be good up to around October 2024 when it's due to have an update. Security certifications are in very high demand in the IT industry with company owners nothing short…
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What is Simple Network Management Protocol (SNMP)?
What is Simple Network Management Protocol? The network management system is usually based on the Simple Network Management Protocol (SNMP), which is a TCP/IP Application Layer protocol that uses IP within UDP. SNMP, illustrated below in Figure 1, is used to share management information between network devices, usually between a management workstation and routers, switches,…
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Cisco Port Security Troubleshooting
Troubleshooting Cisco Switch Port Security Port security is another Cisco IOS software tool that can be used to protect the data plane. This feature secures the CAM table by limiting the number of MAC addresses that can be learned on a particular port or interface. With the port security feature, the switch maintains a table…
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IP Source Guard
IP Source Guard Please read this post in conjunction with our DHCP Snooping post. The IP Source Guard feature is typically enabled in conjunction with DHCP snooping on untrusted Layer 2 ports. IP Source Guard is a feature that restricts IP traffic on untrusted Layer 2 ports by filtering the traffic based on the DHCP…
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