Two technologies that can be used to connect data centers over an IP network and provide layer 2 LAN extension?

The correct answer is B. VXLAN E. OTV. Both VXLAN and OTV are overlay technologies that encapsulate Layer 2 Ethernet frames inside IP packets, enabling Layer 2 extension across a Layer 3 IP WAN between data centers. VXLAN (Virtual Extensible LAN) encapsulates frames in UDP/IP and is widely used in modern data center…

Advanced Data Center Networks

Question

Options

AIS-IS
BVXLAN
CTRILL
DFabric Path
EOTV

How the community answered

(39 responses)

A
3% (1)
B
87% (34)
C
3% (1)
D
8% (3)

Explanation

Both VXLAN and OTV are overlay technologies that encapsulate Layer 2 Ethernet frames inside IP packets, enabling Layer 2 extension across a Layer 3 IP WAN between data centers. VXLAN (Virtual Extensible LAN) encapsulates frames in UDP/IP and is widely used in modern data center fabrics. OTV (Overlay Transport Virtualization) is a Cisco proprietary MAC-in-IP encapsulation specifically designed for DCI (Data Center Interconnect), with built-in loop prevention and failure isolation. IS-IS is a pure Layer 3 routing protocol with no L2 extension capability. TRILL and Fabric Path are data center fabric technologies that operate within a single data center, not across IP WANs.

Topics

#VXLAN#OTV#Layer 2 extension#data center interconnect

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