Refer to the graphic. Host A has established a connection with the HTTP server attached to interface E0 of the xyz router. Which of the following statements describe the information contained in protocol data units sent from host A to this server?
1、
【正确答案】
1、A,D,E
【答案解析】
host A想要连接http的server,首先我们知道HTTP的端口号为知名的端口80,IP地址当然是http server连接到Router XYZ的e0口的IP地址了。由于路由器上默认情况下代理ARP是开启的,所以一有ARP查询MAC地址的,路由器一看这个路由我知道该怎么到达,他就会用自己的MAC地址作为ARP的应答发送回去,所以Host A发送的数据包的目的MAC地址为Router XYZ的E0口的MAC地址。
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