字节中的位排序有关系吗？ [英] Bit ordering in a byte, does it matter?

问题描述

假设我们在网络 MA 和 MB 上有两台计算机，

MA 考虑小端顺序

恰好相反， MB 则按照大字节序排列字节中的位顺序。

Let's say we have two machines on a network MA and MB,
MA considers little endian the order of the bits in a byte,
on the contrary MB cosiders big endian the order of the bits in a byte.

MA 和 MB 如何在通过网络进行
通信期间对字节中的位使用什么终结性？

How do MA and MB agree on what "endianess" to use for the bits in a byte during the communication over the network ?

是否存在标准的网络耐力性？

套接字程序员是否必须采取任何措施以确保正确的通信？

Is there a standard "network endianess" or what ?
Do socket programmers have to take any actions in ensuring a correct communication ?

例如HTTP是一个文本协议，这意味着机器发送和接收表示字符的字节，如果字符的编码在位的字节序方面是不同的呢？

For example HTTP is a text protocol, that means that machines send and receive bytes wich represent characters,what if the encoding of the characters is different in the endianess of the bits ?

谢谢

推荐答案

是的，硬件协议指定了所有网络链路上字节的位顺序。通常，这是由NIC硬件自动处理的。

Yes, the hardware protocols specify the bit order of bytes on all network links. This is generally handled automatically by the NIC hardware.

例如，参见以太网帧格式。

以太网传输很奇怪，因为字节顺序为大端（最左侧的字节先发送），而比特顺序为小端（最先或字节的LSB（最低有效位）发送）。

Ethernet transmission is strange, in that the byte order is big-endian (leftmost byte is sent first), but bit order little-endian (rigthmost, or LSB (Least Significant Bit) of the byte is sent first).

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