JNCIA-DC case studies

The JNCIA-DC is Juniper Networks' associate-level certification in the Data Center track. It is aimed at networking professionals with beginner-to-intermediate knowledge who want to demonstrate a working command of Junos OS in a data center context. Because the associate tier is built on core Junos OS knowledge, the exam objectives emphasize the same building blocks that underpin other Juniper associate credentials: networking fundamentals such as Ethernet, Layer 2 and Layer 3 addressing, subnetting and longest-match routing; Junos OS architecture, including the separation of control and forwarding planes and the roles of the Routing Engine and Packet Forwarding Engine; the CLI, its modes, navigation, help, output filtering, and the active-versus-candidate configuration model; initial device configuration, user accounts, login classes, configuration groups, NTP, SNMP, logging, archival and the rescue configuration; operational monitoring with show and monitor commands, interface statistics and network tools; routing fundamentals including routing versus forwarding tables, route preference, routing instances and static routing; and routing policy and firewall filters, covering policy flow, match conditions and actions, and unicast RPF. Preparation should combine the recommended training and exam resources with hands-on practice on Junos devices, since pass/fail status is reported immediately after the exam and the exam is delivered only in English. The JNCIA-DC case studies are 5 cases and about 3,124 words.