Here's the book you need to prepare for JNCIS exam, JN0-303, from Juniper Networks. Written by the Juniper Network trainer who helped develop the exam, this Study Guide provides the information and insights you need to approach the JNCIS with confidence. Authoritative coverage of all test objectives, including: evaluating the outcome of a policy using a subroutine; identifying the configuration of OSPF route summarization; describing ISO network addressing as it applies to IS-IS; configuring BGP route flap damping; defining the methods available to scope multicast traffic; identifying the differences between a Layer 2 and a Layer 3 VPN; identifying firewall filter capabilities and applications for securing a network; and configuring IPv6 on a Juniper Networks router.