What is the term that describes incoming network communications?

The term that describes incoming network communications is "Ingress." In the context of networking, ingress refers specifically to the flow of data packets entering a network or system from an external source. This is crucial for understanding how data traverses firewalls, routers, and other network security devices, as it helps in monitoring and managing incoming traffic to ensure it aligns with security policies.

In contrast, other options refer to different concepts: Ingestion often relates to the process of absorbing data for analysis or storage, Injection typically pertains to techniques where malicious inputs are introduced into a system, commonly seen in attack vectors like SQL injection, and Egress describes outgoing network communications, specifically data leaving a network towards an external destination. Therefore, "Ingress" is the most accurate term for the inflow of network communications.