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What is the address space of IPv4 and IPv6?
Both IPv4 and IPv6 addresses come from finite pools of numbers. For IPv4, this pool is 32-bits (232) in size and contains 4,294,967,296 IPv4 addresses. The IPv6 address space is 128-bits (2128) in size, containing 340,282,366,920,938,463,463,374,607,431,768,211,456 IPv6 addresses.
What is the basic difference between IPv4 address and IPv6 address?
KEY DIFFERENCE IPv4 is 32-Bit IP address whereas IPv6 is a 128-Bit IP address. IPv4 is a numeric addressing method whereas IPv6 is an alphanumeric addressing method. IPv4 binary bits are separated by a dot(.) whereas IPv6 binary bits are separated by a colon(:).
How does IPv4 and IPv6 work together?
One is dual stack, where your network hardware runs IPv4 and IPv6 simultaneously. The second one is tunnel, meaning encapsulating IPv6 packets within IPv4 packets. And the last method is called Network Address Translation (NAT) by which a device translates IPv6 packets into IPv4 packets or vice versa.
How much bigger is the IPv6 address space than the IPv4 address space?
IPv6 utilizes 128-bit Internet addresses. Therefore, it can support 2^128 Internet addresses—340,282,366,920,938,463,463,374,607,431,768,211,456 of them to be exact. The number of IPv6 addresses is 1028 times larger than the number of IPv4 addresses.
Is IPv6 or IPv4 faster?
IPv4 occasionally won the test. In theory, IPv6 should be a little faster since cycles don’t have to be wasted on NAT translations. But IPv6 also has larger packets, which may make it slower for some use cases. So with time and tuning, IPv6 networks will get faster.
How many address spaces are there in IPv4?
There are 256 such blocks, called 0/8 to 255/8. Each /8 block has 2 24 (about 16.7 million) addresses. Originally, the IPv4 address space was split up into 5 “classes”, named A through E. Class A was the first 50% of the total address space: 128 /8 blocks, from 0/8 to 127/8.
How many IPv6 addresses does an organization have?
A normal organization gets a /48 block of IPv6. A typical /32 ISP allocation contains 65,536 /48 blocks, so an ISP can provision over 65,000 organizations before having to ask their RIR for another /32. Not many ISPs have that many organizational customers.
What is the purpose of a shared IPv4 address?
Its main purpose is to postpone the depletion of IPv4 addresses, by allowing ISPs to introduce a second layer of NATting. A common practice is to give CPEs a unique IPv4 address on their Internet-facing interface and use NAT to hide all addresses on the home LAN.
Which is the next 25% of address space?
Class B was the next 25% of the total address space: 64 /8 blocks from 128/8 to 191/8. These addresses were allocated in /16 chunks of 2 16 or 65,536 addresses each. There were 16,384 such chunks in Class B. Some of these were allocated by Jon Postel as well.