2026 Itexamdump 최신 JN0-664 PDF 버전 시험 문제집과 JN0-664 시험 문제 및 답변 무료 공유: https://drive.google.com/open?id=1Yw7wMm0u1a_9qmIhVWUJm6z9zPJEbcqI
Itexamdump는 아주 믿을만하고 서비스 또한 만족스러운 사이트입니다. 만약 JN0-664시험실패 시 우리는 100% 덤프비용 전액환불 해드립니다.그리고 시험을 패스하여도 우리는 일 년 동안 무료업뎃을 제공합니다.
주니퍼 JN0-664 (서비스 제공 업체, Professional (JNCIP)) 인증 시험은 서비스 제공 업체 네트워킹 경력을 추구하는 데 관심이있는 개인에게 귀중한 인증입니다. 다양한 서비스 제공 업체 네트워킹 기술에 대한 전문 지식을 보여줄 수있는 기회를 제공하고 인증 된 주니퍼 네트워크 전문가로서 인정을받을 수 있습니다.
Itexamdump의Juniper JN0-664교육 자료는 고객들에게 높게 평가 되어 왔습니다. 그리고 이미 많은 분들이 구매하셨고Juniper JN0-664시험에서 패스하여 검증된 자료임을 확신 합니다. Juniper JN0-664시험을 패스하여 자격증을 취득하면IT 직종에 종사하고 계신 고객님의 성공을 위한 중요한 요소들 중의 하나가 될 것이라는 것을 잘 알고 있음으로 더욱 믿음직스러운 덤프로 거듭나기 위해 최선을 다해드리겠습니다.
JN0-664 시험은 라우팅, 스위칭, 네트워크 프로토콜 및 보안과 관련된 Juniper Networks 서비스 제공 업체 기술에 대한 다양한 주제를 다룹니다. 이 시험은 후보자가 서비스 제공 업체 환경에서 Juniper Networks 장비를 구성하고 문제 해결하는 능력을 테스트하며 핵심 개념과 최상의 실천 방법에 대한 이해를 증명하기 위해 설계되었습니다.
질문 # 89
Exhibit
You must ensure that the VPN backbone is preferred over the back door intra-area link as long as the VPN is available. Referring to the exhibit, which action will accomplish this task?
정답：D
설명：
A sham link is a logical link between two PE routers that belong to the same OSPF area but are connected through an L3VPN. A sham link makes the PE routers appear as if they are directly connected, and prevents OSPF from preferring an intra-area back door link over the VPN backbone. To create a sham link, you need to configure the local and remote addresses of the PE routers under the [edit protocols ospf area area-id] hierarchy level1.
질문 # 90
Click the Exhibit button.
You enabled a new router (R3) in your network but all destinations using IS-IS routes are not properly load balancing over this new router.
Referring to the exhibit, what is the problem?
정답：A
설명：
Let's dive into this IS-IS routing problem with a Juniper Networks (JNCIP-SP) perspective, analyze the exhibit, and determine why load balancing isn't working as expected after adding the new router R3. I'll provide a verified answer and a detailed explanation step by step.
C: R3 does not have wide-metrics enabled.
Detailed Explanation
1. Understanding the Exhibit
The exhibit shows the output of IS-IS database commands on two routers, R1 and R2, at Level 2 (L2). IS-IS (Intermediate System to Intermediate System) is a link-state routing protocol commonly used in service provider networks. The output provides details about the IS-IS database, including IP prefixes, metrics, and whether the router supports "wide metrics."
* R1's IS-IS Database (Level 2):
* IP prefix: 10.100.34.0/24
* Internal, Metric: default 63, Up
* IP extended prefix: 10.100.34.0/24, metric 63, Up
* IP extended prefix: 10.100.13.0/24, metric 63, Up
* R2's IS-IS Database (Level 2):
* IP extended prefix: 10.100.12.0/24, metric 1000, Up
* IP extended prefix: 10.100.23.0/24, metric 1000, Up
Additionally, the exhibit mentions that R1 and R2 can "find TLVs" and "match prefix," indicating they are processing IS-IS Type-Length-Value (TLV) data correctly. However, R3 has been newly added, and load balancing across this router isn't working as expected.
2. Key Concepts in IS-IS
To understand the issue, let's break down some critical IS-IS concepts relevant to this scenario:
* IS-IS Levels: IS-IS operates at two levels: Level 1 (L1) for intra-area routing and Level 2 (L2) for inter- area routing. The exhibit shows Level 2, so we're dealing with backbone routing between areas.
* Metrics in IS-IS:
* Default Metrics (Narrow Metrics): By default, IS-IS uses narrow metrics, which are limited to a maximum value of 63 per link (and a maximum path metric of 1023). This is encoded in the original IS-IS TLVs (Type 2 for LSPs).
* Wide Metrics: Wide metrics (introduced in RFC 3784) allow for larger metric values (up to
16,777,215) and are encoded in extended TLVs (Type 22 for LSPs, Type 135 for IP reachability).
Wide metrics are necessary for modern networks where higher metric values are needed for better path selection or when integrating with other protocols like OSPF.
* Load Balancing in IS-IS: IS-IS supports equal-cost multi-path (ECMP) routing, meaning if multiple paths to a destination have the same total metric, traffic can be load-balanced across those paths. For load balancing to work, all routers in the path must agree on the metrics and the paths must be equal- cost.
* TLVs and Extended Prefixes: The exhibit shows "IP extended prefix" entries, which are carried in TLV 135 (for IPv4) when wide metrics are enabled. "IP prefix" (without "extended") refers to the older TLV 128, which uses narrow metrics.
3. Analyzing the Metrics in the Exhibit
* R1's Output:
* R1 advertises 10.100.34.0/24 and 10.100.13.0/24 with a metric of 63.
* The presence of both "IP prefix" and "IP extended prefix" for the same prefix (10.100.34.0/24) suggests R1 is in transition mode. Transition mode means R1 supports both narrow and wide metrics to maintain compatibility with routers that may not support wide metrics.
* R2's Output:
* R2 advertises 10.100.12.0/24 and 10.100.23.0/24 with a metric of 1000.
* These are listed as "IP extended prefix," meaning R2 is using wide metrics (since a metric of
1000 exceeds the narrow metric limit of 63 per link).
4. Identifying the Problem
The issue is that load balancing isn't working over the new router R3. Let's evaluate why:
* Metric Discrepancy: R1 is using a metric of 63 (which fits within narrow metrics), while R2 is using a metric of 1000 (which requires wide metrics). This suggests that R1 and R2 are operating with different metric styles:
* R1 is likely in transition mode (supporting both narrow and wide metrics).
* R2 is using wide metrics exclusively (since its metric of 1000 can only be advertised using wide metrics).
* R3's Role: Since R3 is newly added and load balancing isn't working, we need to consider R3's configuration. The exhibit doesn't show R3's IS-IS database, but the options suggest a problem with wide metrics on either R1 or R3.
* Wide Metrics Requirement: For load balancing to work, all routers in the IS-IS domain must consistently use the same metric style (either all narrow or all wide). If R3 doesn't have wide metrics enabled, it can only process narrow metrics (max 63 per link). This means:
* R3 would ignore R2's advertisements (metric 1000) because they use wide metrics, which R3 can't process.
* R3 would only process R1's narrow metric advertisements (metric 63), leading to incomplete routing information and preventing load balancing.
5. Evaluating the Options
Let's go through each option to confirm the correct answer:
* A. R2 is missing internal routes for R1:
* R2's database shows prefixes like 10.100.12.0/24 and 10.100.23.0/24, but it doesn't show R1's prefixes. However, this is expected because the exhibit only shows a subset of the database. The problem is about load balancing, not missing routes entirely. R2 likely has routes from R1 but may not be able to use them for load balancing if metric styles don't match. This option is incorrect.
* B. R1 is missing internal routes for R2:
* R1's database shows its own prefixes (10.100.34.0/24, 10.100.13.0/24) but not R2's prefixes.
Again, this is likely because the exhibit is limited. R1 should have R2's routes in its database (since they're both in Level 2), but the issue is load balancing, not missing routes. This option is incorrect.
* C. R3 does not have wide-metrics enabled:
* If R3 doesn't have wide metrics enabled, it can only process narrow metrics (max 63). R2's prefixes with a metric of 1000 (using wide metrics) would be ignored by R3. This would result in R3 having an incomplete view of the network, preventing load balancing across paths that involve R2's prefixes. This aligns with the problem described and is the most likely cause. This option is correct.
* D. R1 does not have wide-metrics enabled:
* R1's output shows "IP extended prefix" entries, which are only advertised if wide metrics are enabled. R1 is likely in transition mode (advertising both narrow and wide metrics), so it does support wide metrics. This option is incorrect.
6. Why Load Balancing Fails
For load balancing to work in IS-IS, the total path metrics to a destination must be equal across multiple paths. If R3 doesn't support wide metrics:
* R3 ignores R2's prefixes (metric 1000) because they use wide metrics.
* R3 only sees R1's prefixes (metric 63) and builds its routing table based on narrow metrics.
* As a result, R3 doesn't see equal-cost paths involving R2's prefixes, and load balancing fails.
If R3 had wide metrics enabled, it would process both R1's and R2's prefixes, calculate the total path metrics, and potentially find equal-cost paths for load balancing.
7. Solution
To fix the issue, R3 needs to have wide metrics enabled. In Junos, this can be done with the following configuration:
set protocols isis level 2 wide-metrics-only
This ensures R3 uses wide metrics exclusively, matching R2's configuration and allowing it to process R2's prefixes with metrics like 1000. R1 is already in transition mode, so it will remain compatible.
질문 # 91
Referring to the exhibit, you must provide VRF Internet access over a single connection for VPN- A Site 1, which connects to PE-1.
Which two statements are correct in this scenario? (Choose two.)
정답：A,B
질문 # 92
Exhibit
Referring to the exhibit, CE-1 is providing NAT services for the hosts at Site 1 and you must provide Internet access for those hosts Which two statements are correct in this scenario? (Choose two.)
정답：C,D
설명：
Explanation
To provide Internet access for the hosts at Site 1, you need to configure static routes in the main routing instance on PE-1 that point to the VPN-A.inet.0 table as the next hop. This allows PE-1 to forward traffic from the Internet to CE-1 using MPLS labels and vice versa. You need to configure two static routes: one for the
10.1.2.0/24 prefix that represents the private network of Site 1, and one for the 203.0.113.1/32 prefix that represents the public IP address of CE-1.
질문 # 93
Exhibit.
Referring to the exhibit, which path would traffic passing through R1 take to get to R4?
정답：B
설명：
The OSPF cost is carried in the LSAs that are exchanged within an OSPF area. When a router calculates the cost to a destination it uses the cost of the exit interface of each router in the path to the destination.
질문 # 94
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