有名的java2参考书，即适用于java的学习也适用于对于java 2 certification 的准备

CCIE Security Exam Certification Guide

Cloud Computing Certification Kit Specialist

Cisco.Press.CCNP.TSHOOT.642-832.Official.Certification.Guide.Feb.2010

Cisco.Press.CCNP.SWITCH.642-813.Official.Certification.Guide.Feb.2010 电子书

Cisco.Press.CCNP.ROUTE.642.902.Official.Certification.Guide.Feb.2010.eBook 电子书

Advanced DBA Certification Guide and Reference for DB2® Universal Database™ v8 for Linux®, UNIX®, and Windows®.