Which technology enables Layer 2 extension between remote data center sites?
Click on the arrows to vote for the correct answer
A. B. C. D.D.
https://netcraftsmen.com/spanning-layer-2-between-data-centers/The technology that enables Layer 2 extension between remote data center sites is Overlay Transport Virtualization (OTV).
OTV is a Cisco proprietary technology that provides Layer 2 extension over any transport. It creates an overlay network that allows the extension of Layer 2 traffic across multiple Layer 3 networks. OTV is designed to connect data centers in a way that enables them to function as a single logical data center, which can improve application availability, disaster recovery, and workload mobility.
OTV works by encapsulating Layer 2 frames in IP packets and forwarding them across an IP infrastructure, such as a WAN or the Internet. OTV uses MAC address learning and flooding to ensure that all devices in the overlay network have the same Layer 2 connectivity. OTV also provides mechanisms for loop prevention, multicast optimization, and traffic engineering.
FCIP (Fibre Channel over IP), GRE (Generic Routing Encapsulation), and DM VPN (Dynamic Multipoint VPN) are all technologies that enable connectivity between remote sites, but they do not specifically provide Layer 2 extension. FCIP is used to extend Fibre Channel storage area networks (SANs) over IP networks, GRE is a tunneling protocol that can be used to encapsulate any protocol over any transport, and DM VPN is a scalable VPN solution that allows dynamic creation of VPN tunnels between remote sites.
In summary, the technology that enables Layer 2 extension between remote data center sites is OTV.