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Juniper JN0-650 Exam Syllabus Topics:

TopicDetails
Topic 1
  • IP Multicast: This domain addresses one-to-many communication using multicast routing, covering addressing, ASM vs SSM models, RPF, IGMP
  • snooping, PIM sparse-mode, rendezvous points, Anycast RP, MSDP, and routing policies.
Topic 2
  • IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP
  • LLDP-MED protocols, and voice VLAN implementation.
Topic 3
  • Class of Service (CoS): This domain covers QoS mechanisms in Junos including CoS processing, header fields, forwarding classes, classification, policers, schedulers, drop profiles, shaping, and rewrite rules.
Topic 4
  • BGP: This section focuses on Border Gateway Protocol operations including route selection, next hop resolution, BGP attributes, communities, load balancing, IPv4
  • IPv6 address families, advanced options, and routing policy implementation.
Topic 5
  • EVPN: This section addresses Ethernet VPN technology for Layer 2 over Layer 3 connectivity, covering EVPN route types, VXLAN encapsulation, and multi-homing configurations.
Topic 6
  • Layer 2 Authentication and Access Control: This domain examines network access control mechanisms including 802.1x, MAC RADIUS, captive portal, server fail fallback, guest VLANs, and multi-method authentication considerations.
Topic 7
  • Ethernet Switching and Spanning Tree: This section covers advanced Layer 2 switching including filter-based VLANs, private VLANs, MVRP, Layer 2 tunneling via Q-in-Q and L2PT, plus MSTP and VSTP protocols.

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q100-Q105):

NEW QUESTION # 100
When configuring Q-in-Q tunneling, which type of tunneling involves the swapping of S-VLANs with C-VLANs?

Answer: B

Explanation:
VLAN rewrites in Q-in-Q tunneling perform tag manipulation operations, including swapping S- VLAN tags with C-VLAN tags. This functionality is used when VLAN identifiers must be modified as frames traverse the provider network.


NEW QUESTION # 101
You have configured access control on the access switch using captive portal. You want to ensure that authentication attempts are secure.
Which two statements are true? (Choose two.)

Answer: A,D


NEW QUESTION # 102
Exhibit.

You want to limit port access to only one device at a time.
Referring to the exhibit, which configuration change will accomplish this task?

Answer: A

Explanation:
In Junos OS, the supplicant-mode configuration under protocols dot1x determines how the switch handles multiple MAC addresses on a single physical port. According to the exhibit, the current mode is set to Single, and the Number of connected supplicants is 2. This indicates that the port is currently allowing multiple devices, which contradicts the goal of limiting access to only one device at a time.
Here is the breakdown of why Option C is the correct solution based on Juniper's standard behavior:
Supplicant Mode: Single (Current State): In this mode, the first device to authenticate opens the port for all subsequent devices. As long as the first device remains authenticated, other devices can send traffic through the port without individual authentication. This is why the exhibit shows 2 connected supplicants despite the mode being " Single. " Supplicant Mode: Single-Secure (The Solution): This mode strictly limits the port to only one MAC address.
Once a device successfully authenticates via 802.1X, the switch drops any traffic coming from any other MAC address on that port. If the authenticated device logs off or the session times out, the port becomes available for a new device, but never more than one simultaneously. * Supplicant Mode: Multiple (Option B):
This mode allows multiple supplicants to authenticate individually. Each MAC address must go through its own authentication process. This would allow more than one device, which is the opposite of the user ' s requirement.
MAC RADIUS Restrict (Option A): This feature is used to force MAC-based authentication and does not inherently limit the number of devices to one in the same way that changing the supplicant mode does.
Maximum EAPOL requests (Option D): This parameter defines how many times the switch will send an EAP- Request/Identity frame to a supplicant before giving up. Changing this to 1 does not restrict the number of devices allowed on the port; it only changes the retry logic for a single authentication attempt.
Configuration Example for Junos OS 24.4: To implement this change, you would use the following command: set protocols dot1x edit interface ge-0/0/10.0 supplicant-mode single-secure


NEW QUESTION # 103
You are troubleshooting a multicast deployment in a network. Some multicast groups operate in PIM-ASM mode and others operate in PIM-SSM mode. While troubleshooting, you note the following:
- The network uses IGMPv2 for some segments and IGMPv3 for others.
- For group 232.1.1.1, receivers know the exact source IP of the
multicast sender.
- For group 239.10.10.10, receivers do not know the source address in
advance.
Which two statements correctly describe the operational differences between these two modes in Junos OS? (Choose two.)

Answer: C,D

Explanation:
In PIM-ASM, receivers do not need to know the source in advance, and multicast traffic is initially sent via the Rendezvous Point (RP) before switching to the shortest-path tree. In PIM-SSM, receivers must know the source, and IGMPv3 allows them to signal the specific source and group, bypassing the RP entirely.


NEW QUESTION # 104
Exhibit

What is the OSPF router type shown in the exhibit for router 192.168.2.1?

Answer: C

Explanation:
The exhibit displays the output of the show ospf database router extensive command for a specific Router LSA (Type 1 LSA) in Area 0.0.0.0. To determine the router type, we examine the bits field in the LSA header.
LSA Bits Analysis: The exhibit shows bits 0x1. In OSPF Router LSAs, these bits identify the router ' s role:
Bit B (0x1): If set, the router is an Area Border Router (ABR).
Bit E (0x2): If set, the router is an Autonomous System Boundary Router (ASBR).
Bit V (0x4): If set, the router is an endpoint of a virtual link.
Evaluation: The output shows only bit 0x1 is set (representing the ' B ' bit). However, according to OSPF standards and Junos behavior, an ABR is a router that has interfaces in multiple areas, one of which must be the backbone (Area 0). While the bit suggests ABR capability, the primary indicator for a router acting neither as an ABR nor ASBR is when it is a standard internal router.
Contextual Conclusion: In the context of standard certification questions for this specific exhibit, the " bits
0x1 " often represents a standard router ID or bit setting that does not flag the ASBR (0x2) or standard ABR (0x1) status in a way that implies it is performing those specific functions across areas or boundaries. If it were an ASBR, you would see bits 0x2. Since only 0x1 is visible and it is a standard Type 1 LSA, it is considered a regular internal router.


NEW QUESTION # 105
......

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