JN0-1103 Questions and Answers

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.

A private WAN link offers low latency and inherent security without requiring encryption, making it ideal for transmitting sensitive data while conserving computing resources. It ensures dedicated, reliable connectivity between sites.

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.

Fault management helps detect and address potential issues before downtime occurs, while measuring network performance, errors, and security metrics enables administrators to make data-driven decisions for maintaining and optimizing the network.

cSRX and vSRX are the virtualized versions of the Juniper SRX Series firewalls designed for deployment in virtual environments. The cSRX is containerized, while the vSRX is a VM-based firewall, both supporting advanced security services in cloud or virtualized data centers.

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.

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.

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.

The REST API on Junos devices supports standard HTTP methods such as GET (to retrieve data) and DELETE (to remove configuration elements). However, it is not enabled by default, and HTTPS is typically required for secure communication.

Mist Edge enables seamless mobility and roaming for real-time applications like VoIP by extending Mist’s cloud services to the on-premises edge. It reduces latency and enables fast, reliable handoffs between APs and buildings - resolving issues like dropped VoIP calls during roaming.

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.

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.