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I was very weak in certain areas of 300-430 exam syllabus. The questions in the mock tests here covered the entire syllabus of 300-430. This helped me cover-up the weak areas and even strengthen the topics i knew very well. At the end of the practice of 2 months for cisco ENWLSI, i mastered the syllabus and started achieving good score. I am quite relieved with my hard work here.