I got my CCNA years ago, got a job at an ISP, but then had to quit and I've been out of the game for about 2 years. CCNA expired a year ago or so. Needless to say, a lot of that knowledge has gone dark. (I have terrible memory) Might have an interview soon for another net engineer role. What do y'all think is a good refresher course/book etc? The company uses Cisco.
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