CompTIA Network+ Practice Test

Which technology is used to connect multiple data centers over varying distances?

1. SD-WAN

2. Dynamic routing protocols

3. Data Center Interconnect (DCI)

4. Virtual Extensible LAN (VXLAN)

The correct answer is: Data Center Interconnect (DCI)

The technology that connects multiple data centers over varying distances is Data Center Interconnect (DCI). DCI solutions are specifically designed to enable the transfer of data, applications, and services between geographically dispersed data centers. By facilitating high-speed, reliable connectivity, DCI ensures that data can move seamlessly across wide area networks. DCI solutions can leverage a variety of transport technologies, including fiber optics and even satellite links, to maintain connectivity over long distances. This is particularly important for businesses that need to run applications that span multiple locations or require redundancy for disaster recovery strategies. The other technologies mentioned serve different purposes. SD-WAN focuses on optimizing and securing wide area network connections but is not exclusively designed for data center interconnectivity. Dynamic routing protocols, while essential for directing traffic efficiently within networks, do not specifically address the unique requirements of connecting data centers. Virtual Extensible LAN (VXLAN) is used for creating overlay networks that can enhance the scalability of virtualized environments but does not inherently provide long-distance connectivity suited for inter-data center scenarios. Thus, DCI stands out as the dedicated solution for linking multiple data centers across varying distances.