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

Juniper’s Session Smart Routing includes the Juniper Mist cloud, which provides cloud-managed orchestration and AI-driven insights, and the Session Smart Conductor, which centrally manages routing policies, security, and analytics across the SD-WAN fabric.

To ensure encryption of traffic between customer sites over a Layer 3 VPN, the most effective solution is IPsec with ESP (Encapsulating Security Payload). ESP provides both encryption and authentication, ensuring data confidentiality and integrity across the service provider network.

SD-WAN routes traffic, including security-sensitive data, across MPLS, VPNs, and Internet circuits using encryption and policy-based routing to ensure secure and efficient transmission, even over public networks.

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.

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 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.

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.

For reliable out-of-band management and recovery from misconfigurations, terminal servers should be connected through a separate network, such as a 4G LTE modem or a parallel network of independent routers. This ensures access remains available even if the production network is down.

802.1X authentication is ideal for laptops and company devices, providing strong, identity-based network access control. For devices like printers and cameras that typically do not support 802.1X, MAC authentication offers a fallback method to control access based on device identity.

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.

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.

A greenfield deployment starts from scratch, with no existing infrastructure, allowing for full design freedom. A brownfield deployment involves working within an existing network environment that typically requires integration or upgrades.

Secure Vector Routing (SVR) is specifically designed for SD-WAN environments with limited bandwidth, as it offers encrypted and policy-based routing with minimal overhead compared to protocols like IPsec or GRE. This makes it ideal for bandwidth-constrained branch sites.

When placing access points on the same channel, the recommended signal strength threshold to minimize co-channel interference is −65 dBm. This ensures adequate coverage while avoiding signal overlap that can degrade wireless performance.

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.

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.

These elements directly impact port density and scaling requirements in a campus switching design. Understanding the number of unmanned devices, fixed user workstations with IP phones, and standalone VoIP phones is critical for calculating the total number of access ports needed and ensuring the infrastructure can support current and future capacity demands.