A service mesh is a dedicated infrastructure layer that provides communication management between microservices in a containerized environment. Service meshes provide a range of features including load balancing, service discovery, traffic routing, encryption, and observability. The most popular service mesh frameworks are Istio, Linkerd, and Consul.
The other options provided are:
A. Virtual private network (VPN) - A VPN is a secure connection between two networks over the internet, which is primarily used to ensure secure remote access to a private network.
B. Sidecar pod - A sidecar pod is a design pattern in Kubernetes that allows for two containers to run within the same pod.
C. Overlay network - An overlay network is a virtual network that is built on top of an existing physical network, providing additional network management features, but does not inherently provide the features mentioned in the question.
Answer is D
"A service mesh controls the delivery of service requests in an application. Common features provided by a service mesh include service discovery, load balancing, encryption and failure recovery."
https://www.techtarget.com/searchitoperations/definition/service-mesh
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