VXLAN offers the following benefits:
VLAN flexibility in multitenant segments - D
Higher scalability
Improved network utilization
https://www.ciscopress.com/articles/article.asp?p=2999385&seqNum=3
The correct characteristic of VXLAN is:
D. It is a multi-tenant solution.
Explanation:
VXLAN (Virtual Extensible LAN) is designed to provide network virtualization and extend Layer 2 networks across Layer 3 underlays, allowing for isolated Layer 2 segments, making it well-suited for multi-tenant environments like data centers.
Why other options are incorrect:
A: VXLAN extends Layer 2 networks over a Layer 3 underlay network, not a Layer 2 underlay.
B: VXLAN uses a 8-byte header, not a 12-byte one.
C: VXLAN uses UDP (not TCP) as its transport protocol, specifically over port 4789.
A - VXLAN extends Layer 2 networks over a Layer 3 underlay.
B- VXLAN has an 8-byte header.
C - VXLAN uses UDP (User Datagram Protocol) for transport.
D - VXLAN is designed to support multi-tenancy by isolating traffic between different tenants in a virtualized data center environment. It allows for the creation of multiple virtualized network segments, each identified by a VXLAN Network Identifier (VNI).
A is incorrect bcoz VXLAN extends Layer 2 and Layer 3 overlay networks over a Layer 3 underlay, not a Layer 2 underlay. VXLAN encapsulates Layer 2 frames within UDP packets, allowing them to be transmitted over a Layer 3 network.
D is the correct answer. D is wrong:
'A VXLAN is a virtual layer 2 network (known as the overlay network) built on top of an existing physical layer 3 network (known as the underlay network). VXLAN uses a logical tunnel to transport traffic between two endpoints.'
Whoops! D is the correct answer. A is wrong:
'A VXLAN is a virtual layer 2 network (known as the overlay network) built on top of an existing physical layer 3 network (known as the underlay network). VXLAN uses a logical tunnel to transport traffic between two endpoints.'
'Built on top of an existing physical layer 3 network' is the key concept.'
A. **It extends Layer 2 and Layer 3 overlay networks over a Layer 3 underlay.**
VXLAN is a network virtualization technology that enables the creation of Layer 2 and Layer 3 overlay networks on top of a Layer 3 (IP) underlay network. VXLAN is often used in virtualized and cloud environments to provide network segmentation and isolation. It allows for the extension of Layer 2 domains across Layer 3 networks.
The other options are not accurate:
B. VXLAN typically has a 50-byte packet header.
C. VXLAN uses UDP (User Datagram Protocol) for transport, not TCP.
D. VXLAN is often used in multi-tenant environments, but the term "multi-tenant solution" is a bit broad. VXLAN itself is a technology that facilitates network virtualization and segmentation, which can be used in multi-tenant scenarios.
You've mistyped the presented answer, which is:
"A. It extends Layer 2 and Layer 3 overlay networks over a **Layer 2** underlay"
The underlay, as you pointed out, should be Layer 3, so A is incorrect. Leaving D as the correct answer.
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