So, we use the internet too much and we've used up all 4.3 billion addresses. Hence, the introduction of IPv6, which consists of many more.
IPv6 addresses are written in 8 groups of four hexadecimal digits, for example
2001:0db8:85a3:0000:0000:8a2e:0370:7334
(from wikipedia). Each hexadecimal digit can be one of the numbers 0 to 9 or the letters a, b, c, d, e, f, which gives 16 options or 24 options. This means that each set or 4 can have (24)4 = 216 with 8 groups this is (216)8 = 2128 which is about 3.4 × 1038 individual addresses. More than enough to last us the next few years!
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