JN0-1100: Juniper Networks Certified Design AssociateDemo

When remote sites experience unreliable connectivity to a headquarters data center, the design objective is redundancy and resiliency of the WAN path itself, not encryption, prioritization, or throughput optimization of a single link. WAN aggregation combines multiple diverse WAN transport links into one logical connection so that if one link degrades or fails, traffic continues to flow over the remaining links, which is what delivers reliable access to corporate assets for remote-office users.

WAN aggregation devices require high availability because they concentrate critical WAN connectivity. Redundant power supplies provide power resilience and reduce the risk that a single power-supply failure disrupts WAN connectivity.

Network engineering needs training to design, configure, integrate, and troubleshoot the new equipment. Network operations needs training to monitor, maintain, and support it in production.

Without MDIX, a straight-through Ethernet cable connects unlike interface types: an MDI endpoint such as a computer or server to an MDIX switch port. Like interface types require crossover cabling. Cisco’s cabling guidance lists switch-to-computer/server connections as straight-through and switch-to-switch connections as crossover.

Data Center Interconnect enables Layer 2 extension across data centers and supports resiliency deployments, including disaster recovery and geographically distributed high-availability clusters (geoclustering). Cisco DCI guidance identifies Layer 2 connectivity, disaster recovery, and geo-clustering as relevant DCI capabilities and use cases.