Az Internetwork Expert oktatója, 5x CCIE (R&S, ISP, Voice, SP, Security): Internetwork Expert Instructor Brian Dennis Passes Voice CCIE Lab, Becomes 5-Time CCIE
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Az Internetwork Expert oktatója, 5x CCIE (R&S, ISP, Voice, SP, Security): Internetwork Expert Instructor Brian Dennis Passes Voice CCIE Lab, Becomes 5-Time CCIE