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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Services | 15% | - DNS Relay - Quality of Service (QoS) — classification, policing, shaping, queuing - Firewall Filters (ACLs) and Policers - DHCP Relay and Snooping |
| Topic 2: Network Optimization and Monitoring | 15% | - Class of Service (CoS) — schedulers, drop profiles, rewrite rules - OpenConfig and YANG - Simple Network Management Protocol (SNMP) - Junos Analytics and Streaming Telemetry - sFlow and Port Mirroring for traffic analysis |
| Topic 3: Layer 2 Switching | 15% | - VLANs and VLAN Trunking Protocol (VTP) - Layer 2 Forwarding and MAC Table Management - BPDU Protection, Loop Protection - Spanning Tree Protocols (STP, RSTP, MSTP) - Link Aggregation (LACP) |
| Topic 4: Security and Automation | 15% | - MACsec (Encryption at Layer 2) - Junos PyFMT (Python-based automation) - Ansible and Jinja2 templating - Interactive CLI and scripts - Storm Control and Port Security - Zero Touch Provisioning (ZTP) - 802.1X (Port-Based Network Access Control) |
| Topic 5: High Availability | 20% | - Virtual Chassis (VC) and Virtual Chassis Fabric (VCF) - In-Service Software Upgrade (ISSU) - Bidirectional Forwarding Detection (BFD) - Non-Stop Routing (NSR) - Graceful Routing Engine Switchover (GRES) - Non-Stop Bridging (NSB) - IP Surveillance and Multicast RP |
| Topic 6: Layer 3 Routing | 20% | - Route Redistribution and Route Filtering - Policy-Based Routing - OSPF (Multi-area, LSA types, SPF calculation) - BGP (iBGP, eBGP, route reflectors, confederations) - Load Balancing and ECMP - IS-IS (single area, multi-area) |
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NEW QUESTION # 45
You have configured CoS on a Junos device. A packet is classified as best effort by a behavior aggregate (BA) classifier, and as expedited forwarding by a multifield (MF) classifier.
Which statement is true in this scenario?
Answer: A
NEW QUESTION # 46
Which statement accurately describes the role of a multicast RP, specifically when using the PIM sparse mode?
Answer: A
Explanation:
InPIM Sparse Mode (PIM-SM), theRendezvous Point (RP)is the cornerstone of the multicast distribution model.
* The Meeting Point (Option A):The RP serves as a central clearinghouse where multicast sources and receivers meet.
* When a source starts transmitting, the first-hop router encapsulates the data and sends it to the RP via aPIM Registermessage.
* When a receiver wants to join a group, its last-hop router sends a(*,G) PIM Joinrequest toward the RP.
* The RP then manages the distribution from the source to the receivers until a Shortest Path Tree (SPT) can be established directly between them.
* Incorrect Statements:Option Bis incorrect because PIM Dense Mode does not use an RP; it uses a
"flood and prune" mechanism.Option Cis incorrect because the RP only forwards traffic to interfaces that have explicitly requested it via Join messages, which is what makes it "sparse".Option Dis incorrect because SSM (Source-Specific Multicast) specifically avoids using an RP by having receivers join a known source directly.
NEW QUESTION # 47
Exhibit:
Referring to the exhibit, which statement is true?
Answer: C
NEW QUESTION # 48
Exhibit
You want to provide better performance for the video traffic that traverses your network The video traffic enters your network without any class-of-service markings According to Juniper Networks, which two classification methods are performed by the routers shown in the exhibit? (Choose two.)
Answer: C,D
Explanation:
The exhibit illustrates a standard end-to-end Class of Service (CoS) path consisting of an edge router (R1) and core/intermediate routers (R2 and R3).
* Edge Classification (Option B):The scenario specifies that video traffic enters the networkwithout any class-of-service markings. Because there are no DSCP or 802.1p bits to inspect, the ingress router (R1) cannot use simple Behavior Aggregate (BA) classification. Instead, it must useMultifield (MF) classification. MF classification allows the router to look deeper into the packet (Source/Destination IP, Protocol, Port numbers) to identify the video stream and assign it to a specific forwarding class. *Core Classification (Option D):Once R1 has identified the traffic, it will typically apply arewrite ruleon its egress interface to mark the packets with a specific CoS value (like a DSCP code). Consequently, the downstream routers (R2 and R3) do not need to perform expensive deep-packet inspection again. They can useBehavior Aggregate (BA) classification, which simply looks at the markings in the packet header to determine the appropriate forwarding priority.
* Option A and C:These are incorrect because BA classification is impossible on unmarked ingress traffic, and performing MF classification in the core is inefficient and not a recommended Juniper design practice for high-speed transit.
NEW QUESTION # 49
You have a multicast enabled network that uses PIM sparse mode.
Which two statements are true? (Choose two.)
Answer: B,C
NEW QUESTION # 50
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