When forwarding a TCP, UDP, or ICMP packet, the firewall needs to query the session...

Huawei firewalls are stateful devices. This means they do not evaluate every packet only by static rules; instead, they track communications as sessions and then handle subsequent packets based on the session state. When the first packet of a flow arrives, the firewall matches it against the security policy, performs checks (and NAT if configured), and if allowed, it creates a session entry in the session table. That entry records key information such as source/destination IP addresses, protocol, ports or identifiers, zones, NAT translation information, timeout values, and the current state.

After the session is created, later packets of the same TCP/UDP flow, or related ICMP traffic, are forwarded efficiently by querying the session table first. If a matching session exists and the state is valid, the firewall applies the corresponding actions (permit/deny, NAT mapping, logging, QoS, inspection) without repeating the full policy lookup each time. If no session matches, the firewall treats the packet as a new flow and re-evaluates it against policies. Therefore, the statement is true.