【单选题】网络层主要任务是为分组通过通信子网选择适当的( )
【简答题】Some people claim that we should read only those books that are about real s, real people and established facts. Do you agree or disagree with this viewpoint? Write an essay of about 400 words to...
【单选题】网络层的主要任务是为分组通过通信子网选择适当的()。
【简答题】通信子网是计算机网络的()层,主要任务是()