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Juniper JN0-664 Exam Questions
- Topic 1: OSPF: In this topic, Juniper networking professionals delve into the core concepts and operations of OSPFv2 and OSPFv3. The focus is on configuring and monitoring single-area and multi-area OSPF scenarios. This ensures proficiency in managing link-state routing protocols and enhancing network efficiency. Understanding OSPF prepares the audience to address challenges in service provider environments effectively.
- Topic 2: IS-IS: This topic provides an in-depth exploration of the Intermediate System to Intermediate System (IS-IS) protocol, focusing on its operation and concepts. Juniper networking professionals learn how to configure and monitor single-area and multi-area IS-IS, equipping them with skills essential for maintaining scalable and robust routing infrastructures in large networks.
- Topic 3: BGP: The concepts, operation, and functionality of Border Gateway Protocol (BGP) form the crux of this topic. Juniper networking professionals gain insights into BGP scaling mechanisms and develop expertise in configuring and monitoring BGP in complex scenarios. Mastery of BGP is vital for optimizing route distribution and achieving efficient inter-domain routing.
- Topic 4: Class of Service (CoS): This topic emphasizes the principles of Junos OS Class of Service (CoS). Juniper networking professionals learn to configure and monitor CoS for efficient traffic prioritization. This ensures service quality by managing bandwidth, latency, and packet loss, a critical aspect of service provider network optimization.
- Topic 5: IP Multicast: Aspiring Juniper networking professionals explore the concepts and operations of IP multicast, including IGMP, PIM dense mode, and PIM sparse mode (including SSM). The topic focuses on configuration and monitoring techniques, enabling efficient delivery of multicast traffic across the network while optimizing resource utilization.
- Topic 6: Layer 3 VPNs: This topic covers the concepts and operation of Layer 3 VPNs, including their configuration and monitoring. Juniper networking professionals also explore Junos OS support for carrier-of-carriers and inter-provider VPN models. These skills are crucial for managing secure, scalable, and interconnected multi-tenant network environments.
- Topic 7: Layer 2 VPNs: Juniper networking professionals gain comprehensive knowledge of Layer 2 VPNs, including BGP Layer 2 VPNs, LDP Layer 2 circuits, VPLS, and EVPN. This topic focuses on configuring, monitoring, and troubleshooting Layer 2 VPNs, ensuring expertise in providing efficient and seamless layer 2 connectivity across service provider networks.
Free Juniper JN0-664 Exam Actual Questions
Note: Premium Questions for JN0-664 were last updated On Sep. 17, 2026 (see below)
Exhibit
The environment is using BGP All devices are in the same AS with reachability redundancy Referring to the exhibit, which statement is correct?
BGP route reflectors are BGP routers that are allowed to ignore the IBGP loop avoidance rule and advertise IBGP learned routes to other IBGP peers under specific conditions. BGP route reflectors can reduce the number of IBGP sessions and updates in a network by eliminating the need for a full mesh of IBGP peers. BGP route reflectors can have three types of peerings:
EBGP neighbor: A BGP router that belongs to a different autonomous system (AS) than the route reflector.
IBGP client neighbor: An IBGP router that receives reflected routes from the route reflector. A client does not need to peer with other clients or non-clients.
IBGP non-client neighbor: An IBGP router that does not receive reflected routes from the route reflector. A non-client needs to peer with other non-clients and the route reflector.
In the exhibit, we can see that RR1 and RR2 are route reflectors in the same AS with reachability redundancy. They have two types of peerings: EBGP neighbors (R1 and R4) and IBGP client neighbors (Client1, Client2, and Client3). RR1 and RR2 are also peered with each other as IBGP non-client neighbors.
You are asked to protect your company's customers from amplification attacks. In this scenario, what is Juniper's recommended protection method?
Which two EVPN route types are used to advertise a multihomed Ethernet segment? (Choose two )
EVPN is a solution that provides Ethernet multipoint services over MPLS networks. EVPN uses BGP to distribute endpoint provisioning information and set up pseudowires between PE devices. EVPN uses different route types to convey different information in the control plane. The following are the main EVPN route types:
Type 1 - Ethernet Auto-Discovery Route: This route type is used for network-wide messaging and discovery of other PE devices that are part of the same EVPN instance. It also carries information about the redundancy mode and load balancing algorithm of the PE devices.
Type 2 - MAC/IP Advertisement Route: This route type is used for MAC and IP address learning and advertisement between PE devices. It also carries information about the Ethernet segment identifier (ESI) and the label for forwarding traffic to the MAC or IP address.
Type 3 - Inclusive Multicast Ethernet Tag Route: This route type is used for broadcast, unknown unicast, and multicast (BUM) traffic forwarding. It also carries information about the multicast group and the label for forwarding BUM traffic.
Type 4 - Ethernet Segment Route: This route type is used for multihoming scenarios, where a CE device is connected to more than one PE device. It also carries information about the ESI and the designated forwarder (DF) election process.
Exhibit.
Referring to the exhibit; the 10.0.0.0/24 EBGP route is received on R5; however, the route is being hidden.
What are two solutions that will solve this problem? (Choose two.)
Exhibit
You are attempting to summarize routes from the 203.0.113.128/25 IP block on R8 to AS 64500. You implement the export policy shown in the exhibit and all routes from the routing table stop being advertised.
In this scenario, which two steps would you take to summarize the route in BGP? (Choose two.)
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