protocol of application layer的用法和樣例：
例句
- The purpose of this layer is to define the application layer protocol for the exchange of cellular subscriber information between networks.
這一層的主要用途是為了定義在網路間交換蜂窩網路用戶信息的應用層協議。 - Select the transport layer you want for interrogating your nameservers.
選擇你要查詢你的伺服器的傳輸層協議。
