Azure Virtual Network Peering, as it allows for seamless connectivity between virtual networks across different Azure regions without the need for public internet, ensuring low latency and high bandwidth.

Azure VPN Gateway, which provides secure site-to-site connectivity over the public internet, but may not meet the low latency and high bandwidth requirements due to its dependency on internet connectivity.

Azure ExpressRoute, offering dedicated private network connectivity with higher reliability, lower latency, and more consistent network performance than internet-based connections, but at a higher cost.

Azure DNS, primarily used for managing domain name resolution and not suitable for connecting virtual networks across regions.

Both Azure Virtual Network Peering and Azure ExpressRoute, combining the benefits of low latency, high bandwidth connectivity across regions with the option for dedicated private network connectivity where required.