Darryl's book.

OmniMan

Is Darryl's book alone enough to pass the sys 401 exam? I passed the 301 back in 2013 with just his book. I work in the industry now and I did not back then.

NetworkNewb

I literally passed the test early this year with only reading about 2 and a half chapters from the book. No other resources. Its that amazing!

(4 years of IT experience probably contributed a little too)