The terms “ingress” and “egress” are used more commonly in computer networking to describe the flow of data in and out of a network or a specific part of a network, like a server or a switch.
For example, when we talk about network security, we might say that we need to monitor the egress traffic from a server to make sure that no sensitive data is leaving the network. Or, when setting up a firewall, we might create a rule that only allows ingress traffic on certain ports to prevent unauthorized access.
The terms “inbound” and “outbound” are more commonly used to describe the flow of data in and out of a specific device or application.
For example, when we talk about email, we might say that incoming email is “inbound” and outgoing email is “outbound.” Or, when we talk about a web application, we might say that incoming requests are “inbound” and outgoing responses are “outbound.”
In summary, “ingress” and “egress” are more commonly used in the context of network infrastructure and security, while “inbound” and “outbound” are more commonly used in the context of individual devices or applications.