Juniper JN0-1103 Design - Associate (JNCIA-Design) Exam Practice Test

For a 120-meter (400-foot) connection between switches, multimode fiber is the most reliable and cost-effective option. It supports higher bandwidth and longer distances than UTP (which is limited to 100 meters) and is more stable and secure than a wireless solution.

In a 3-stage IP fabric, each leaf node must connect to every spine node to ensure full mesh connectivity at Layer 3 between leafs via the spine layer. This design supports ECMP and optimal traffic distribution across the fabric.

SD-WANallows branches to aggregate multiple WAN links(e.g., MPLS, broadband, LTE) to optimize performance and redundancy. It also supports local breakoutfor Direct Internet Access (DIA), improving cloud application performance by avoiding backhaul to a central site.

A Secure Web Gateway (SWG) provides proxy services to inspect and filter web traffic and includes firewall capabilities to enforce security policies, block threats, and control access to internet resources.

SD-WAN solutions can offer comparable security and privacy to traditional MPLS by using encryption and secure tunnels. They also support local breakout for Direct Internet Access (DIA) at remote sites, improving performance for cloud applications by avoiding backhaul to a central location.

VXLAN and MPLS are commonly used to encapsulate frames and provide Layer 2 reachability across an IP fabric. VXLAN enables L2 overlays over L3 infrastructure, while MPLS can also be used in L2VPN services to extend L2 connectivity across IP/MPLS networks.

Juniper Networks supports WAN Assurance through both cloud-only and hybrid cloud models with Session Smart Routing and Mist AI. This flexibility allows organizations to choose fully cloud-managed operations or a combination of cloud and on-premises control based on their requirements.

The oversubscription ratio in an IP fabric is influenced by the number of spine nodes relative to the number of leaf nodes and their uplinks.

Removing spine nodes reduces available uplink bandwidth, increasing oversubscription.

Adding spine nodes increases available bandwidth between leafs and spines, decreasing the oversubscription ratio.

BGP multipath with multiple-as is required in an EBGP underlay to enable ECMP across multiple autonomous system paths. In an IBGP underlay, Route Reflectors help scale the control plane by reducing the need for a full mesh of BGP sessions among all fabric nodes.

A greenfield deployment refers to a new deployment in an environment with no existing infrastructure, offering fewer restrictions and greater design flexibility compared to modifying or integrating into an existing network.

MX Series routers are high-performance, scalable routers used in various roles such as data center interconnects, service provider backbones, and edge networks. They support advanced routing, MPLS, and security features, making them ideal for these critical infrastructure areas.

Switch-3 has 40 x 1 GbE (total 40 Gbps) access connections and 2 x 10 GbE uplinks (total 20 Gbps) to the distribution layer. The oversubscription ratio is calculated as access bandwidth to uplink bandwidth:

40 Gbps / 10 Gbps per uplink × 2 = 40:10 = 4:1.

PTX Series routers are purpose-built for the core network, offering ultra-high throughput, scalability, and low-latency forwarding ideal for service provider and large-scale data center cores.

The OAMP management methodology stands for Operations, Administration, Maintenance, and Provisioning. These categories define key areas in managing and sustaining network infrastructure effectively.

EVPN-VXLAN is an overlay solution that extends Layer 2 network segments across a Layer 3 WAN. It enables seamless connectivity between remote sites or data centers while maintaining Layer 2 adjacency, making it ideal for distributed environments.

To support fast roaming and AP redundancy, it’s important to have radio frequency coverage overlap, allowing clients to switch APs seamlessly. Deploying APs on the same channel in a controlled manner (e.g., with fast roaming technologies like 802.11r/k/v) can also aid in minimizing transition latency.

The exhibit shows a leaf-spine architecture with two spine layers and one leaf layer, forming a 3-stage IP Clos topology. It also aligns with a 3-tier architecture (Core, Aggregation/Distribution, Access), commonly used in traditional and modern data center designs to improve scalability and performance.

To establish an accurate network baseline, it's essential to understand the expected application behavior and gather a comprehensive history of performance metrics over time. This helps identify deviations and troubleshoot issues effectively.