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| Section | Weight | Objectives |
|---|---|---|
| Border Gateway Protocol (BGP) | 20% | - IPv4/IPv6 address families, policy implementation - Route selection, next-hop handling, attributes - Communities, extended communities, load balancing |
| IP Multicast | 15% | - Multicast routing policy & scoping - ASM / SSM models, RPF mechanism - IGMP, PIM-SM, RP, Anycast RP, MSDP |
| Advanced Ethernet Switching & Spanning Tree | 20% | - Filter-based VLANs, private VLANs, MVRP - MSTP, VSTP, RSTP configuration & tuning - Layer 2 tunneling: Q-in-Q, L2PT |
| Access Control & IP Telephony | 5% | - PoE, LLDP-MED, voice VLAN - 802.1X, MAC RADIUS, captive portal |
| Class of Service (CoS) | 10% | - Rewrite rules, congestion management - Classification, marking, forwarding classes - Policers, schedulers, drop profiles, shaping |
| EVPN & Data Center Interconnect | 10% | - Multi-homing, redundancy, integration - EVPN route types, VXLAN encapsulation |
| Interior Gateway Protocols (IGPs) | 20% | - OSPFv2 / OSPFv3: design, configuration, troubleshooting - IS-IS: operation, routing policy, route filtering - Route preference, redistribution, summarization |
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NEW QUESTION # 53
You have a workstation and an IP phone that connect to the same physical port on your Juniper switch.
Which two statements are true? (Choose two.)
Answer: B,C
NEW QUESTION # 54
Exhibit.
Referring to the exhibit. Ieaf2 is elected the designated forwarder
Which two statements are correct if server2 generates a broadcast frame*? (Choose two.)
Answer: A,B
Explanation:
The exhibit illustrates an EVPN-VXLAN fabric using multi-homing. Server1 is dual-homed to Leaf1 and Leaf2 using an Ethernet Segment Identifier (ESI) in an active-active or active-standby configuration. Server2 is single-homed to Leaf3.
In EVPN environments, specific mechanisms are used to prevent loops and duplicate traffic when dealing with Broadcast, Unknown Unicast, and Multicast (BUM) traffic:
Broadcast Propagation (Option A): When Server2 (connected to Leaf3) generates a broadcast frame, Leaf3 encapsulates this traffic into a VXLAN tunnel and forwards it to all other VTEPs (Virtual Tunnel End Points) that participate in that specific Virtual Network Instance (VNI). Therefore, both Leaf1 and Leaf2 will receive the broadcast frame from the core fabric.
Designated Forwarder (DF) Election (Option C): To prevent a multi-homed device (like Server1) from receiving duplicate copies of the same broadcast frame from multiple leaf switches, EVPN utilizes a Designated Forwarder (DF). For a given ESI, only one leaf switch is elected as the DF.
The exhibit explicitly states that Leaf2 is the Designated Forwarder.
According to the Junos EVPN implementation, only the DF is responsible for decapsulating BUM traffic received from the core and forwarding it to the local access segment.
While Leaf1 receives the frame (Option A), it will see that it is not the DF for that segment and will drop the frame rather than forwarding it to Server1. This ensures Server1 receives exactly one copy of the broadcast, delivered by Leaf2.
Option B is incorrect because in a standard ingress replication or multicast-based underlay, all VTEPs in the VNI receive the broadcast.
Option D is incorrect because Leaf1 is the non-designated forwarder (non-DF) for this segment and is prohibited from forwarding BUM traffic to the ESI.
NEW QUESTION # 55
YourNet is learning the 210.210.40.0/24 route from Provider A and Provider B. YourNet would like to forward traffic destined to the 210.210.40.0/24 network using Provider B.
Referring to the exhibit, how would you accomplish this task?
Answer: D
NEW QUESTION # 56
You are deploying a new campus switching environment using EX Series switches. This new environment includes IP phones requiring Power over Ethernet (PoE) and end-user client PCs attached to a single switch port that will be configured with 802.1X authentication.
Considering the default configuration on an EX Series access switch and the configuration requirements to support this deployment, which two statements are correct? (Choose two.)
Answer: A,D
Explanation:
In a standard campus deployment on Juniper EX Series switches involving VoIP phones and 802.1X authentication, understanding the default behavior of Junos OS 24.4 is critical:
Voice VLAN (Option A): By default, an access port belongs to a single VLAN (the native or data VLAN).
For an IP phone to operate correctly on the same physical port as a PC, a Voice VLAN must be explicitly configured and associated with the interface. This allows the switch to segregate voice traffic (usually tagged) from data traffic (untagged).
802.1X Configuration (Option D): Access ports do not have 802.1X authentication enabled by default. To enforce network access control for the client PCs, you must manually enable and configure the dot1x protocol on all relevant interfaces.
PoE Default (Option B): On EX Series switches that support PoE (like P or MP models), PoE is enabled by default on all PoE-capable ports. Therefore, additional configuration is generally not required unless you need to change power priorities or management modes.
LLDP Default (Option C): Standard LLDP is typically enabled by default in the factory configuration of most EX Series switches to facilitate neighbor discovery. While LLDP-MED is used for VoIP, the core requirement for " deploying " the described environment highlights the manual steps of VLAN and security setup rather than protocol discovery which often runs out-of-the-box.
NEW QUESTION # 57
Click the Exhibit button.
Referring to the exhibit, which two statements are true? (Choose two.)
Answer: C,D
Explanation:
The show ospf interface output provides critical information about the local OSPF state.
* Loopback Behavior (Option A): The output shows lo0.0 is in the DR (Designated Router) state with Nbrs 0. In Junos OS, OSPF adjacencies are not formed over loopback interfaces; they are treated as stub networks.
* Neighbor State (Option D): Every interface listed (ge-0/0/1.0, ge-0/0/2.0, and lo0.0) shows Nbrs 0.
This indicates that the router is not seeing any OSPF neighbors. Since the physical interfaces are in the DR state (meaning the router has elected itself as the DR because no other routers responded), it confirms the router is not receiving OSPF Hello messages from any potential neighbors on those segments.
* Router ID: The DR ID 192.168.1.17 is the local router ' s own ID, not a neighbor it is trying to reach.
NEW QUESTION # 58
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