这道题怎么理解？

sinkevin

QUESTION 286
A host is attempting to send data to another host on a different network. What is the first action that the
sending host will take?

A. Drop the data.
B. Send the data frames to the default gateway.
C. Create an ARP request to get a MAC address for the receiving host.
D. Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.

跨网段的话ARP怎么能获得目的主机地址？

jievisionvanish

跨网段的话只能获得网关的mac地址 通过网关去转发

m7651935

我个人理解,,,你可以这么记

first action 首先干什么,首先发ARP得到MAC地址,也就是网关,然后.....

一息百年

代理ARP，获取的不是真正主机的mac，而是网关的mac