JN0-1103 Design - Associate (JNCIA-Design) Questions and Answers

WAN aggregation is represented by the central router that connects multiple branch sites through a Carrier Ethernet service to the enterprise WAN, consolidating traffic.

Private WAN is shown through the use of Carrier Ethernet, which is a private service providing secure, dedicated connectivity between branches and the enterprise WAN.

VXLAN is a network virtualization technology that provides a Layer 2 overlay over a Layer 3 underlay. It enables the extension of Layer 2 segments across a Layer 3 infrastructure, facilitating scalable multi-tenant data center networks.

In Juniper Networks' enterprise network designs, the distribution layer typically uses QFX and EX Series switches. These platforms provide the necessary scalability, performance, and Layer 3 capabilities to aggregate access layer switches and support routing between VLANs.

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.

To support SRX chassis cluster design, two special interface types are required:

fab (fabric) interfaces for data plane synchronization and control interfaces for control plane communication between the nodes in the cluster.

rsync and SFTP are commonly used, cost-free tools for creating and scheduling secure backups of configuration files or data. Both support automation via scripts, making them suitable for designing a reliable backup solution without incurring additional costs.

Postman is commonly used to prototype API requests, making it ideal for testing and verifying network APIs before automation scripts are developed. It also helps in connecting network infrastructure to cloud applications by crafting and sending REST API calls to interact with cloud-based services and platforms.

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.

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

In a Clos data center fabric using IBGP as the underlay, BGP ADD-PATH must be enabled to allow multiple equal-cost paths to be advertised and installed on the leaf switches. This supports ECMP (Equal-Cost Multi-Path) routing, which is essential for optimal traffic distribution in the fabric.

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.

SD-WAN enhances network security by using encryption for WAN traffic, ensuring data confidentiality over public or hybrid networks. It also supports zero-touch provisioning, which simplifies deployment by automating device configuration without manual intervention.

The diagram shows an enterprise WAN connected to two different ISPs through edge routers, with security elements in place. This configuration is characteristic of an Internet edge design, where the enterprise network interfaces with external service providers, providing redundancy and secure access to the internet.

The SRX5800 is a high-performance hardware firewall designed for large data centers and supports 10 GbE interfaces. The vSRX is a virtual firewall that also supports 10 GbE virtual interfaces, making it suitable for virtualized data center environments with high throughput needs.

In an ESI-LAG configuration, both VTEPs (leaf switches) advertise reachability to the same Ethernet Segment Identifier, ensuring redundancy and load balancing. To make this work correctly with LACP, thesystem ID must be identical on both leafs so that the downstream device sees them as a single LAG endpoint.