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| Section | Weight | Objectives |
|---|---|---|
| Interior Gateway Protocols (IGPs) | 20% | - OSPFv2 / OSPFv3: design, configuration, troubleshooting - Route preference, redistribution, summarization - IS-IS: operation, routing policy, route filtering |
| Access Control & IP Telephony | 5% | - 802.1X, MAC RADIUS, captive portal - PoE, LLDP-MED, voice VLAN |
| EVPN & Data Center Interconnect | 10% | - Multi-homing, redundancy, integration - EVPN route types, VXLAN encapsulation |
| Advanced Ethernet Switching & Spanning Tree | 20% | - MSTP, VSTP, RSTP configuration & tuning - Layer 2 tunneling: Q-in-Q, L2PT - Filter-based VLANs, private VLANs, MVRP |
| IP Multicast | 15% | - Multicast routing policy & scoping - ASM / SSM models, RPF mechanism - IGMP, PIM-SM, RP, Anycast RP, MSDP |
| Class of Service (CoS) | 10% | - Classification, marking, forwarding classes - Rewrite rules, congestion management - Policers, schedulers, drop profiles, shaping |
| Border Gateway Protocol (BGP) | 20% | - IPv4/IPv6 address families, policy implementation - Communities, extended communities, load balancing - Route selection, next-hop handling, attributes |
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NEW QUESTION # 98
Exhibit
Referring to the exhibit, what will enable active routes from both peers?
Answer: A
Explanation:
The exhibit shows router1 (AS 65001) connected to router2 (AS 65002) via two parallel physical links. The show bgp summary output indicates that sessions are established with two neighbors: 10.10.10.1 and
10.10.20.1. Currently, for the second neighbor (10.10.20.1), there are 0 active routes despite having 4 accepted routes, which indicates that BGP has selected only one " best path " via the first neighbor for forwarding.
BGP Best Path Selection: By default, BGP only selects a single best path for any given destination prefix and installs that one path into the forwarding table. In a topology with parallel links to the same AS, this leads to underutilization of available bandwidth.
Multipath Solution (Option B): To enable active routes from both peers and allow for load-balancing (ECMP) across both links, you must enable the multipath feature.
When the multipath statement is configured under the protocols bgp group ext-peers hierarchy, it tells Junos OS to install multiple equal-cost BGP paths into the routing table and subsequent forwarding table.
Since both neighbors belong to the same peer group (ext-peers) and the same AS (65002), configuring multipath at the group level will apply to both sessions, allowing paths from both neighbors to be marked as " active " .
Incorrect Options:
Option A: 172.16.1.1 is the loopback address of router2. The exhibit shows peering is currently done using physical interface addresses (10.10.10.1 and 10.10.20.1), so this address is irrelevant to the current active sessions.
Option C: Configuring the neighbor address alone without the multipath parameter will not change the best- path selection behavior.
Option D: 10.10.20.2 is the local interface IP of router1, not the neighbor ' s IP. BGP multipath must be configured to point to remote peer paths.
Configuration Example for Junos OS 24.4: To implement this, apply the following command: set protocols bgp group ext-peers multipath
NEW QUESTION # 99
A modified deficit round-robin scheduler is defined by which two variables? (Choose two.)
Answer: C,D
Explanation:
In Junos OS Class of Service (CoS), a scheduler is the mechanism used to assign resources to the various egress queues on an interface. Specifically, when utilizing a modified deficit round-robin (MDRR) or weighted round-robin algorithm to service these queues, the scheduler ' s behavior is defined by two primary variables:
* Transmit Rate (Option A): This variable defines the minimum guaranteed bandwidth for a queue.
In the context of a deficit round-robin algorithm, the transmit rate serves as the weight for the queue.
Queues with higher transmit rates receive a larger " quantum " of data they can send during each round- robin cycle compared to queues with lower rates.
* Buffer Size (Option C): This variable defines the amount of memory (buffer space) allocated to the queue. It ensures that the queue can hold a certain amount of delayed traffic during periods of congestion to prevent immediate packet drops. The buffer size can be configured as a percentage of the total interface buffer or as a temporal value.
Why other options are incorrect:
* Layer 2 and Layer 3 fields (Options B & D): These fields are utilized by classifiers (Behavior Aggregate or Multifield) to identify and group traffic into forwarding classes. They are used before the scheduling process begins and do not define the resource allocation of the scheduler itself.
NEW QUESTION # 100
In a Junos device, which statement is correct for configuring a Level 1 IS-IS router?
Answer: A
NEW QUESTION # 101
Your network has Junos Fusion configured with MX960 routers as aggregation devices (AD) and QFX5100 switches as satellite devices (SD).
Which two statements are correct in this scenario? (Choose two.)
Answer: A,D
NEW QUESTION # 102
A BGP network has been designed to provide resiliency and redundancy to a multihomed customer network.
Which two statements are correct in this scenario? (Choose two.)
Answer: A,B
NEW QUESTION # 103
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