"circuit-level gateways" znaczenie w angielski leksykon

Singular of circuit-level gateways is circuit-level gateway.

These firewalls listen for Transmission Control Protocol (TCP) handshaking requests from external hosts and decide whether to accept or reject such requests based on port numbers.
When the firewall accepts a handshaking request, a TCP session is established between the firewall and the remote host. The firewall then establishes a separate proxy session with the internal host that the remote host is trying to communicate with and then relays communication between the two sessions using an internal circuit connection it establishes within itself. Combining circuit-level screening with packet filtering provides a higher level of defense than packet filtering by itself.