Final answer:
Network Virtual Appliances provide network functions like firewalling and WAN optimization in a virtualized environment. They feature easy deployment, scalability, high availability, and flexible security policies.
Step-by-step explanation:
Core Features of Network Virtual Appliances (NVAs):
Network Virtual Appliances (NVAs) are virtual machines that provide network and security functions to applications running on a virtual network. One core feature of these appliances is that they offer functions such as firewalling, WAN optimization, and network traffic analysis. They are designed to be easy to deploy and manage in a cloud environment, often provided as part of a virtualized infrastructure. NVAs usually support scalability by allowing multiple instances to be deployed as part of a scaled-out architecture. The high availability and redundancy features of NVAs ensure that network services remain uninterrupted, thereby enhancing the reliability of the network. Furthermore, NVAs offer flexible and granular security policies, which can be adapted dynamically to meet changing network conditions and threats.