Free JN0-1103 sample questions
Real questions from the Design, Associate (JNCIA-DESIGN) practice bank, with the correct answer and an explanation for each one. No junk, no filler.
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A large e-commerce company is designing its new data center network for maximum resiliency. The core of the design is an EVPN-VXLAN fabric using QFX Series switches. A critical server farm, hosting the company's main application, requires active-active multihoming to two different leaf switches (Leaf-1 and Leaf-2) for both load balancing and redundancy. The servers are connected using standard LACP bonds. The primary design goal is to ensure that if either Leaf-1 or its uplinks fail, traffic continues to flow through Leaf-2 without any service interruption or need for the server to detect a link failure on its LACP bundle. The solution must prevent traffic black-holing and ensure rapid convergence. The solution should be standards-based and avoid proprietary link aggregation protocols. Which Juniper technology should be implemented on Leaf-1 and Leaf-2 to meet these active-active multihoming requirements for the server farm?
True or False: A "brownfield" network design project implies that the new network components must integrate with, or replace parts of, a pre-existing, operational network infrastructure.
A retail company is deploying a Juniper AI-driven SD-WAN solution to its 200 store locations. Each store has a primary broadband link and a secondary LTE link. The design requires that Point-of-Sale (POS) transaction traffic always uses the link with the lowest latency, while guest Wi-Fi traffic should be load-balanced across both links. Where is the real-time path selection decision for the POS traffic made in a Juniper SD-WAN architecture?
A systems administrator is physically racking new equipment for a spine-and-leaf data center fabric. The design includes four spine switches and thirty-two leaf switches. The administrator questions the physical cabling plan. What is the fundamental physical connectivity rule for a non-blocking spine-and-leaf architecture?
A security architect is designing a Zero Trust network for a financial institution. The core principle is "never trust, always verify." A key part of the design involves dynamically adjusting a user's access rights based on their behavior, device posture, and location in real-time. Which concept is most critical for implementing this dynamic, context-aware access control in a Zero Trust model?
True or False: In the SRX chassis cluster configuration shown below, if the primary node (node0) fails, the cluster will maintain stateful connections for existing TCP sessions that fail over to the new primary node (node1). graph TD subgraph "SRX Chassis Cluster" SRX1[node0 - Primary] SRX2[node1 - Backup] SRX1 ---|Control Link| SRX2 SRX1 ---|Fabric Link for RTOs| SRX2 end Internet((Internet)) --reth0--> SRX1 Internet --reth0--> SRX2 LAN[Internal LAN] --reth1--> SRX1 LAN --reth1--> SRX2
A network designer is planning a new enterprise WLAN deployment for a multi-floor office building using the Juniper Mist platform. To ensure a successful outcome, the designer must follow a structured process. Which THREE of the following activities are critical during the initial design and planning phases, before any hardware is deployed? (Select THREE)
A small enterprise requires a new switch for its campus access layer. The key requirements are support for Power over Ethernet (PoE+) for phones and APs, basic Layer 2 features, and the ability to be managed by the Mist Cloud. The solution must be cost-effective. Which Juniper product series is most suitable for this campus access layer role?
An IP fabric in a data center is nearing its port capacity. The current architecture consists of four QFX10008 spine switches and 64 QFX5120 leaf switches. The design team needs to add another 32 servers, requiring 32 new leaf switches. What is the correct way to scale this IP fabric horizontally to accommodate the new leaf switches?
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