Certification Tests
Network Certification Exam Tutorial: An Introduction To Backup Types
Fault tolerance isn't fault invulnerability. No matter how hard we work to avoid single points of failure, sooner or later something catastrophic will happen to a part of our network. Read more →Network+ / CCNA Certification Exam Tutorial: Port Numbers And Troubleshooting
Passing the Network+ and CCNA exams demands that you know quite a few port numbers, but they're important to know when working with real-world networks as well. Read more →Network+ Certification Exam Tutorial: Address Resolution Protocol (ARP)
When you're studying for the Network+ exam, you've got to master the fundamentals of networking, because the Network+ is a hard exam to pass due to the range of information covered. Read more →Network+ Certification Exam Tutorial: Collision Domains And Switches
In the previous Network+ exam tutorial, we talked about how collisions occur when data sent by two hosts on a shared Ethernet segment transmit data at the exact same time. Read more →Network+ Certification Exam Tutorial: DHCP And RARP
Part of passing the Network+ exam is mastering the many different protocols and services you're introduced to in your studies, and that's especially hard when two protocols do much the same thing! Read more →Network+ Certification Exam Tutorial: Ethernet CSMA/CD Explained
When you're studying for the Network+ exam, you've got a lot of new acronyms to learn! One of the basics is CSMA/CD, which stands for Carrier Sense Multiple Access with Collision Detection. Read more →Network+ Certification Exam Tutorial: How And When To Use Virtual LANs (VLANs)
From your Network+ exam studies, you know that switches forward broadcasts, and that sounds great, but that's not always a good thing. A switch can have anywhere from 12 ports to 80 or more, and by default all hosts connected to that switch are going to be in the same broadcast domain. Read more →Network+ Certification Exam Tutorial: ARP and Proxy ARP Explained
In yesterday's Network+ tutorial, we talked about the importance of Address Resolution Protocol (ARP) in today's networks. A host PC must have the MAC and IP addresses of a remote host in order to send data to that remote host, and it's ARP that allows the local host to request the remost host to send the local host its MAC address through an ARP Request. Read more →Network+ Exam Certification Tutorial: The Bus Topology
The Physical layer of the OSI model isn't the most exciting or interesting to work with, but it's the foundation for everything we do in networking. The same goes for the physical side of networking - whether it's cable types, network topologies, or network cards, it's not necessarily the most exciting study you'll ever do, but it is the most important. Read more →Network+ Exam Tutorial: Becoming A Master Troubleshooter
Passing your Network+ exam is the first step on the way to becoming a master network troubleshooter, and that's where you need to be. The average network admin spends 90% of their time troubleshooting and 10% installing hardware and software, so you better be good at troubleshooting! Read more →← Previous Next →
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Aphorism
By his very success in inventing labor-saving devices, modern man has manufactured an abyss of boredom that only the privileged classes in earlier civilizations have ever fathomed.