I am a novice AS/400 operator. However, my interest lies in security as well as routing and switching in a Cisco environment. What type of certification would benefit or complement my AS/400 learning experience? I'm afraid that other than general computing principles and a good appreciation for what you may know as JCL (much of the non-IBM world thinks of as a "command line interface" or CLI) not much will transfer from your AS/400...
knowledge base into a Cisco knowledge base. That said, what you're considering is a pretty sound move career-wise.
Given your interests, I'd suggest pursuing the following certifications in the order mentioned:1. CCNA
After that, if you want to go deeper into security or other technical topics, look at Cisco Specialist credentials or at various flavors of the CCIE.
For more info on this topic, please visit these SearchSecurity.com resources:
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