In cloud environments, virtual networks are used to support applications that may rely on different protocols for communication. Let’s analyze each option:
A. a Layer 3 virtual network
Incorrect:A Layer 3 virtual network operates at the IP level and is designed for routing traffic between subnets or networks. It is not suitable for applications that use non-IP protocols (e.g., Ethernet-based protocols).
B. a Layer 2 virtual network
Correct:A Layer 2 virtual network operates at the data link layer (Layer 2) and supports non-IP protocols by forwarding traffic based on MAC addresses. This makes it ideal for applications that rely on protocols like Ethernet, MPLS, or other Layer 2 technologies.
C. an Ethernet VPN (EVPN) Type 5 virtual network
Incorrect:EVPN Type 5 is a Layer 3 overlay technology used for inter-subnet routing in EVPN environments. It is not designed to support non-IP protocols.
D. a virtual network router connected to the virtual network
Incorrect:A virtual network router is used to route traffic between different subnets or networks. It operates at Layer 3 and is not suitable for applications using non-IP protocols.
Why Layer 2 Virtual Network?
Support for Non-IP Protocols:Layer 2 virtual networks forward traffic based on MAC addresses, making them compatible with non-IP protocols.
Flexibility:They can support a wide range of applications, including those that rely on Ethernet or other Layer 2 technologies.
JNCIA Cloud References:
The JNCIA-Cloud certification covers virtual networking concepts, including Layer 2 and Layer 3 networks. Understanding the differences between these layers is essential for designing networks that meet application requirements.
For example, Juniper Contrail supports Layer 2 virtual networks to enable seamless communication for applications using non-IP protocols.
[Reference:, Virtual Networking Documentation, Juniper JNCIA-Cloud Study Guide: Virtual Networks, , , ]
