In base-pointer addressing mode, the register has the base address and the literal number has the offset.
在基指针寻址模式中,寄存器中保存的是基址,数字是偏移量。
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That is, the code that parses the connection URL can handle the longer (128-bit mode) IPv6 addresses (as well as IPv4 format). This IP address can be an IPv6 literal.