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

Planned outages (for maintenance or upgrades) and WAN failures (due to carrier or link issues) both directly impact network uptime by causing service disruptions, either scheduled or unexpected.

For a cost-sensitive small data center, the EX4300 and EX4400 switches are suitable leaf node options. They offer sufficient port density and features like Virtual Chassis or EVPN-VXLAN (EX4400) at a lower cost compared to high-end QFX models.

When designing a WLAN, determining the number and location of access points is essential to ensure adequate coverage, capacity, and performance, while minimizing interference and ensuring seamless connectivity.

Cloud Access Security Brokers (CASBs) provide key functions such as visibility into cloud application usage and compliance enforcement by monitoring, auditing, and applying policies to ensure adherence to security and regulatory standards.

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.

Encrypted Traffic Insights is a Juniper ATP Cloud feature that detects threats within HTTPS trafficwithout decrypting it. It uses metadata, machine learning, and behavioral analysis to identify anomalies while maintaining privacy.

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.

Capacity planning requires a clear view of the current application behavior to assess real-time demands and predicting future traffic projections to ensure the network can scale efficiently and handle increased load over time.

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.

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.

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.

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.

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

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.

Juniper’s SASE (Secure Access Service Edge) solution combines Juniper Secure Edge, which delivers cloud-based security services, and Mist AI-Driven SD-WAN, which provides secure, intelligent WAN connectivity. Together, they support secure, seamless access across distributed environments.

IPsec with NAT Traversal (NAT-T) encapsulates IPsec packets within UDP headers, adding additional overhead compared to standard IPsec. This results in higher packet overhead, which can affect performance and MTU handling more than other VPN protocols.