问题
单项选择题
●TCP/IP communication protocol contains four layers.From bottom to top,the four layers are__(71)__.
A．network interface layer,internet layer,transport layer and application layer
B．internet layer,network interface layer,transport layer and application layer
C．network interface layer,transport layer,network interface layer and application layer
D．application layer,transport layer,internet layer and network interface layer
答案
参考答案：A