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If you need assistance with Subnetting practice, I found a gem of a website through google:
IP Subnet Practice
I wish there was a website like this that helped with TCP UDP ports.
WGU Progress: B.S. Network Management & Design <- I quit (got bored)
Here's a good site for subnetting practice problems
subnettingquestions.com - Free Subnetting Questions and Answers Randomly Generated Online
Personally, I would just print out the ports and keep going over them until you have them memorized (write them down over and over if you have too, this method works pretty well).
This would be a great start:
Others have asked the same question as you have. Please try to search the forums first because others may have had a similar question and been provided the resouces already.
And of course:
TE offers an IP calculator (for windows). You could use this to practice different scenerios or use it to check your answers to scenerios you create as practice.
"Grammar and spelling aren't everything, but this is a forum, not a chat room. You have plenty of time to spell out the word "you", and look just a little bit smarter." by Phaideaux
***I'll add you can Capitalize the word 'I' to show a little respect for yourself too.
'i' before 'e' except after 'c'.... weird?
+1 on subnettingquestions.com
I picked up subnetting right back where I left off and it is very good for beginners as well