DATA ENCAPSULATION AND WHITE BOARD HELP FOR YOUR EXAM
Preparing for your CCNA? Having trouble remembering your OSI layers and fast sub-netting, troubleshooting methods, terminology and command functions? Here's some methods I found worked for me.
White Board Help
OSI Study is a must do during your Cisco exams you'll be asked questions on this and you'll also need to subnet fast, here's a simple graphic! I wrote this out for myself on an A4 to help me with the equations, note: I can write this out now without looking at anything to give me the answers, and you'll be able to in a few days, don't print it off and stare at it for hours! Print it, look at it, keep it with you, when your watching TV later glance at it occasionally, quiz yourself, it takes time but it works. You'll notice that the last digits end in 2, 4, 8, 6, 2, 4, 8, 6 etc, 5 to the power of 2 is 32, 15 to the power of 2 is 32768 the first two numbers there add up to 5 and are the same. 14 = 16384, the second number of 14 (4) is the same as the last number of 16384. That's where is started, and it all helped me.
Can't remember the Seven Layer OSI Model? (Please Do Not Teach Students Pointless Acronyms). Common networking diagnostic commands: nbtstat, sigverif, nslookup, route print, show spanning-tree, arp -a, all aid your troubleshooting skills. Click on image for larger version and more information.
Order Of Data Encapsulation
During your Cisco CCNA CCNP exam you'll also be asked about the 'Correct Order Of Data Encapsulation?' which is Data Segment Packet Frame Bit.
If you plan to be a network engineer, you will also have to study the 7 layers of the IOT (Internet Of Things) and Cloud Models.
As mentioned in the picture above, we use Wireshark packet sniffer to aid in all our diagnostics, not only that many other companies also do! Meaning you'll be asked and you'll see adverts quoting that having knowledge of this software will be a required skill, or an advantage, before your job application.