Lpi Certification 300-100 LPIC-3 300: Mixed Environment certification covers the administration of Linux systems enterprise-wide in a mixed environment. 300-100 exam is related to LPIC-3 Certification. The candidate must have an active LPIC-2 certification to receive LPIC-3 certification, but the LPIC-2 and LPIC-3 exams may be taken in any order. LPIC-3 Exam 300: Mixed Environments