JNCIA-JUNOS EXAM QUESTIONS AND ANSWERS

Depending on Device, Junos runs on ______ - Answer- Free BSD or Linux X release - Answer- Updated at a slower pace so that certain features specific to the platform can be released at a faster cadence. Used for Junos Security products. RE - Answer- routing engine. X86 or PowerPC architecture. Maintains the routing tables, bridging table, and primary forwarding table - Answer- RE NSR - Answer- Nonstop active routing traffic that does not pass through the local device - Answer- Exception Traffic Connects to the Packet Forwarding Engine through an internal link - Answer- RE PFE - Answer- Packet Forwarding Engine. Controlled by the RE. GRES - Answer- graceful Routing Engine Switchover Responsible for performing protocol updates and system management - Answer- RE What performs protocols updates and system managment? - Answer- RE Provides the CLI and J-Web GUI - Answer- RE What does the PFE maintain/offer - Answer- Layer 2 bridging info, advanced services such as policers, stateless firewall filters, and CoS. Traffic that is never sent to or processed by the control plane - Answer- Transit Traffic Exception Traffic - Answer- Packets addressed to the chassis, such as routing protocol updates, Telnet sessions, pings, traceroutes, replies to traffic sourced from the RE what type of traffic handles IP packets with the IP options field? - Answer- Exception Traffic The built-in rate limiter that sits between the RE and PFE over the internal link, is this configurable? - Answer- no what type of traffic handles the generation of ICMP messages? - Answer- Exception Traffic Forwarded through the PFE on platforms running the Junos OS, based on the forwarding table installed on the PFE - Answer- Transit Traffic