JPR-944 Sample Questions & Answers
Free JNCIE-ENT practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.
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- Question 1Intermediate
EVPN · EVPN configuration and troubleshoot
In an EVPN-VXLAN environment, you observe that traffic for a specific host is being flooded unnecessarily. You suspect an issue with the MAC-IP advertisement routes. Which EVPN Route Type is responsible for advertising MAC addresses and optional IP addresses to remote VTEPs to suppress flooding?
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Correct answer: B
EVPN Type 2 routes are 'MAC/IP Advertisement' routes. They carry the MAC address and optionally the IP address of hosts. This allows VTEPs to learn reachable hosts via BGP rather than data plane flooding, enabling ARP suppression and efficient forwarding.
- Question 2Intermediate
BGP · IBGP route-reflector
You are configuring a BGP route reflector (RR) in a service provider network. To prevent routing loops within the cluster, the RR adds a specific attribute to the BGP update before reflecting it to a client. Which attribute is used for this specific loop prevention mechanism within the cluster?
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Correct answer: D
The Originator ID is a BGP attribute (non-transitive) created by a Route Reflector. It carries the Router ID of the originator of the route in the local AS. If a router receives an update with its own Router ID in the Originator ID field, it discards the update to prevent a loop.
- Question 3Intermediate
Layer 2 Switching and Security · Virtual Chassis
True or False: In a Juniper Virtual Chassis configuration utilizing a pre-provisioned file, the member ID of a switch is automatically determined by the order in which the switches boot up.
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Correct answer: B
This is False. In a 'pre-provisioned' configuration, you explicitly map the chassis serial number to a Member ID in the configuration file. Boot order does not dictate the ID; the configuration does. The automatic election based on boot order applies to a non-provisioned (default) setup.
- Question 4Advanced
IGP · Routing policy
You are configuring an IS-IS network and need to leak specific routes from Level 2 to Level 1 to provide optimal routing for a specific subnet. Without this leaking, L1 routers only see a default route to the L1/L2 router. Which mechanism in Junos IS-IS policy allows this downward route leaking?
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Correct answer: C
To leak routes from Level 2 to Level 1 in IS-IS on Junos, you must create a policy that matches the desired routes (often from protocol isis, level 2) and accepts them. Then, you apply this policy to IS-IS as an export policy. The syntax often involves
from level 2andto level 1logic within the policy or the export application context. - Question 5Intermediate
Layer 2 Switching and Security · Private VLAN
A customer requires a Private VLAN implementation where multiple devices in the same VLAN need to communicate with the gateway but must not communicate with each other. Which type of secondary VLAN should you configure for these device ports?
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Correct answer: D
In a Private VLAN (PVLAN) structure, an 'Isolated' secondary VLAN ensures that ports within that VLAN cannot communicate with each other at Layer 2. They can only communicate with Promiscuous ports (like the gateway). This matches the requirement perfectly.
- Question 6Advanced
Protocol Independent Routing · Filter-based forwarding
You are configuring Filter-Based Forwarding (FBF) to route traffic from a specific source subnet to a different ISP than the main routing table uses. After creating the firewall filter and the routing instance, which interface configuration step is mandatory to apply this policy?
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Correct answer: C
Filter-Based Forwarding relies on an input firewall filter to match traffic and apply a
routing-instanceaction. This filter must be applied to the ingress interface (family inet filter input) where the traffic enters the router. Without this application, the FBF logic never triggers.
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