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分组交换的基本思路是将报文分成一定长度的若干段落,每个段落称为一个分组,每个分组的前面加上一个标题(或叫分组头,Header)用以指明该分组发往的地址,然后由交换机根据每个分组的地址标志,将它们转发到目
The basic idea of packet switching is to break the packet into segments of a certain length, each of which is called a packet. The header of each packet is preceded by a header (or header) indicating the address to which the packet is addressed , Then the switch according to each packet’s address flag, they are forwarded to the destination