200-155 · Question #126
Which description of OTV is true?
The correct answer is A. It extends Layer 2 domains by tunneling traffic over an IP network.. OTV (Overlay Transport Virtualization) is a Cisco technology designed to extend Layer 2 networks between separate data centers by encapsulating Ethernet frames within an IP packet for transport over an IP-based network.
Question
Which description of OTV is true?
Options
- AIt extends Layer 2 domains by tunneling traffic over an IP network.
- BIt encapsulates the entire Ethernet frame in a new Ethernet encapsulation.
- CIt extends Layer 3 domains across geographically disparate data centers.
- DIt encapsulates Layer 2 frames in the IP header by using stateful tunnels.
How the community answered
(21 responses)- A90% (19)
- C5% (1)
- D5% (1)
Why each option
OTV (Overlay Transport Virtualization) is a Cisco technology designed to extend Layer 2 networks between separate data centers by encapsulating Ethernet frames within an IP packet for transport over an IP-based network.
OTV specifically extends Layer 2 VLANs across different data centers or sites over an IP transport network, allowing seamless workload mobility. It encapsulates Layer 2 Ethernet frames in an IP/UDP header, effectively tunneling them across the IP infrastructure.
OTV encapsulates Ethernet frames in an IP/UDP header, not a new Ethernet encapsulation.
OTV is designed to extend Layer 2 domains, not Layer 3 domains, across geographically disparate data centers.
While OTV encapsulates Layer 2 frames within an IP header, it uses stateless tunnels for forwarding, relying on MAC routing rather than stateful tunnel maintenance.
Concept tested: OTV Layer 2 extension
Source: https://www.cisco.com/c/en/us/products/switches/nexus-7000-series-switches/data_sheet_c78-620211.html
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