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| Section | Weight | Objectives |
|---|---|---|
| Interior Gateway Protocols (IGPs) | 20% | - Route preference, redistribution, summarization - IS-IS: operation, routing policy, route filtering - OSPFv2 / OSPFv3: design, configuration, troubleshooting |
| Border Gateway Protocol (BGP) | 20% | - Route selection, next-hop handling, attributes - Communities, extended communities, load balancing - IPv4/IPv6 address families, policy implementation |
| EVPN & Data Center Interconnect | 10% | - EVPN route types, VXLAN encapsulation - Multi-homing, redundancy, integration |
| IP Multicast | 15% | - Multicast routing policy & scoping - ASM / SSM models, RPF mechanism - IGMP, PIM-SM, RP, Anycast RP, MSDP |
| Class of Service (CoS) | 10% | - Rewrite rules, congestion management - Policers, schedulers, drop profiles, shaping - Classification, marking, forwarding classes |
| Advanced Ethernet Switching & Spanning Tree | 20% | - Filter-based VLANs, private VLANs, MVRP - Layer 2 tunneling: Q-in-Q, L2PT - MSTP, VSTP, RSTP configuration & tuning |
| Access Control & IP Telephony | 5% | - PoE, LLDP-MED, voice VLAN - 802.1X, MAC RADIUS, captive portal |
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NEW QUESTION # 97
Which statement accurately describes the role of a multicast RP, specifically when using the PIM sparse mode?
Answer: C
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 # 98
Which two statements are true regarding PIM sparse mode? (Choose two.)
Answer: A,C
NEW QUESTION # 99
You have deployed a Juniper switch that hosts multiple VLANs.
Which statement is true?
Answer: A
NEW QUESTION # 100
Which statement accurately describes the operation of OSPF within the Junos OS?
Answer: D
Explanation:
OSPF (Open Shortest Path First) is a standards-based Link-State Interior Gateway Protocol (IGP) implemented within Junos OS 24.4:
* Intra-AS Routing:OSPF is designed to distribute routing information and performneighbor discovery within a single Autonomous System (AS). It divides the AS into areas to localize Link-State Advertisements (LSAs) and reduce the size of the Link-State Database (LSDB) on each router. (Option B)
* Algorithm:OSPF uses theShortest Path First (SPF) or Dijkstra algorithm, not a distance vector algorithm (which would be RIP or BGP). This makesOption Aincorrect.
* Directly Connected Routes:In Junos OS, you must explicitly configure an interface under the [edit protocols ospf] hierarchy to include it in the OSPF process. Once an interface is added, its prefix is automatically advertisedto neighbors via Router (Type 1) LSAs. This makesOption Ctechnically inaccurate in the context of interfaces participating in the protocol.
* Scope:Protocols used between multiple autonomous systems are External Gateway Protocols (EGPs), such as BGP. This makesOption Dincorrect.
NEW QUESTION # 101
While deploying class of service on an EX Series switch, what are two aspects of the scheduler? (Choose two.)
Answer: C,D
Explanation:
In Junos OS Class of Service (CoS),schedulersare the components that define how traffic in a specific queue is treated before it is transmitted out of an interface.
* Queue Priority (Statement C):A scheduler identifies thepriorityof the queue (e.g., low, medium-low, medium-high, or high). This determines the order in which the hardware handles traffic from different queues.
* Buffer Size (Statement D):A scheduler defines thebuffer size(amount of memory) allocated to a queue, which can be specified as a percentage, a temporal value (in microseconds), or the remainder of available buffer space. This helps manage bursts of traffic and prevent tail drops.
* Other Components:Rate-limiting (Statement A) is typically handled bypolicersor interface-level shaping, while code translation (Statement B) is the role ofrewrite rules.
NEW QUESTION # 102
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