multi-layer protocol in a sentence

1. This thesis analyzes the security risk of the municipal e - govemment network of chengdu , reports the specific security demands of the network , and defines the objectives of the network . applying the modem security theory and technology , build an integrated secure network with multi - layer protocol and multi - level structure . and design a security management plan which is very import in the whole security system
2. It's difficult to find multi-layer protocol in a sentence.