HUAWEI CLOUD's load balancing provides traffic distribution services to multiple cloud servers, and supports traffic forwarding at layers 4 and 7. The traffic forwarding at layer ( ) is based on…

HUAWEI CLOUD's load balancing provides traffic distribution services to multiple cloud servers, and supports traffic forwarding at layers 4 and 7. The traffic forwarding at layer ( ) is based on identifying the relevant fields in the HTTP/HTTPS protocol packet header. to be realized. (Please fill in the Arabic numerals in the blanks)