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The size of an IP address in IPv6 is _________

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The size of an IP address in IPv6 is _________

(a) 4 bytes

(b) 128 bits

(c) 8 bytes

(d) 100 bits

I got this question in examination.

My enquiry is from IPv6 in division TCP/IP Protocol Suite of Computer Network

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The correct choice is (b) 128 bits

For explanation: An IPv6 address is 128 bits long. Therefore, 2128 i.e. 340 undecillion addresses are possible in IPv6. IPv4 has only 4 billion possible addresses and IPv6 would be a brilliant alternative in case IPv4 runs out of possible new addresses.

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