nce-times-on-a-junip-kamhs","certificationSlug":"juniper-jncis-ent","examCode":"JNCIS-ENT","examName":"Juniper Networks Enterprise Routing and Switching, Specialist (JNCIS-ENT, JN0-352) (JNCIS-ENT)","questionText":"You are tasked with tuning OSPF convergence times on a Juniper EX Series switch. Which configuration command hierarchy allows you to modify the OSPF Hello and Dead intervals on a specific interface?","difficulty":"medium","domain":"OSPF","domainSlug":"ospf","topic":"","questionNumber":0,"totalQuestions":0,"options":[{"key":"A","isCorrect":false,"text":"set routing-options ospf interface interval ","explanation":"Routing options does not contain protocol-specific interface timer definitions.","masteryContext":""},{"key":"B","isCorrect":true,"text":"set protocols ospf area interface hello-interval ","explanation":"The hello-interval and dead-interval commands are nested under the OSPF interface hierarchy.","masteryContext":""},{"key":"C","isCorrect":false,"text":"set interfaces unit 0 family inet ospf hello-timer ","explanation":"OSPF family parameters on interfaces in Junos are limited to basic metrics, authentication, and pass-through settings; timers are configured under protocols ospf.","masteryContext":""},{"key":"D","isCorrect":false,"text":"set system ospf interface timer hello ","explanation":"OSPF commands reside under [edit protocols ospf], not [edit system ospf].","masteryContext":""}],"correctOptionKey":"B","correctOptions":["B"],"correctAnswerText":"","isMultiSelect":false,"mainExplanation":"In Junos OS, OSPF interface-specific parameters such as hello-interval and dead-interval are configured under the [edit protocols ospf area interface ] hierarchy.","examTrap":null,"examTip":null,"technicalDeepDive":null,"keyConcepts":[],"faqs":[],"eliminationLogic":null,"exhibitText":null,"exhibitUrl":null,"hasExhibit":false,"isExhibitQuestion":false,"questionPairs":null,"hasMatchingPairs":false,"isMatchingQuestion":false,"relatedQuestions":[],"breadcrumbItems":null,"nextQuestionUrl":null,"previousQuestionUrl":null,"domainPracticeUrl":null,"certificationUrl":null,"domainUrl":null,"hasAnswerOptions":true,"updatedAt":"2026-08-29T04:08:23.519169+00:00","questionType":"multiple_choice"},{"id":"0a0be89c-8f62-4567-b3dd-443d760de80d","slug":"you-are-configuring-multiple-vlans-on-an-ex-series-switch-an-yjide","certificationSlug":"juniper-jncis-ent","examCode":"JNCIS-ENT","examName":"Juniper Networks Enterprise Routing and Switching, Specialist (JNCIS-ENT, JN0-352) (JNCIS-ENT)","questionText":"You are configuring multiple VLANs on an EX Series switch and wish to set the aging time for learned MAC addresses to 600 seconds. Where is this parameter configured?","difficulty":"medium","domain":"Layer 2 Switching And VLANs","domainSlug":"layer-2-switching-and-vlans","topic":"","questionNumber":0,"totalQuestions":0,"options":[{"key":"A","isCorrect":false,"text":"[edit vlans default ageing-timer 600]","explanation":"Ageing timer is not configured per-VLAN under the [edit vlans] hierarchy.","masteryContext":""},{"key":"B","isCorrect":false,"text":"[edit protocols l2-learning aging-time 600]","explanation":"L2-learning parameters are configured under switching options, not standard routing protocols.","masteryContext":""},{"key":"C","isCorrect":false,"text":"[edit system mac-address-table aging-time 600]","explanation":"The system hierarchy does not contain Layer 2 switching table timers.","masteryContext":""},{"key":"D","isCorrect":true,"text":"[edit ethernet-switching-options mac-table aging-time 600]","explanation":"Correct. Ethernet-switching options govern MAC table aging behavior globally on EX switches.","masteryContext":""}],"correctOptionKey":"D","correctOptions":["D"],"correctAnswerText":"","isMultiSelect":false,"mainExplanation":"MAC table aging time in Junos is configured under the [edit bridge-options] or [edit ethernet-switching-options] hierarchy depending on the platform.","examTrap":null,"examTip":null,"technicalDeepDi