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Questions tagged [ipv4]

Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form of dotted decimals between 0-255. Ex: 169.254.0.1

The IP address of a device is its unique identifier on a network which allows communication with that device.

Given the fact that only 2^32 IPs are available, number which is already depleted, its successor (IPv6) has officially taken over on 6 June 2012.

462 questions
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Why doesn't the IETF reallocate IPv4 netblocks from regions that are over supplied?

I just was looking at the Hurricate Electric website, and it says that ARIN is out of IPv4 addresses. Meanwhile LACNIC, APNIC, RIPE, and AfiNIC have millions of unallocated IPv4 addresses. I did a number of search engine queries on variations of…
David
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About 198.18.0.0/15 segment

What exactly is the use case of 198.18.0.0/15 segment As per whois records, this segment is reserved as depicting below - NetRange: 198.18.0.0 - 198.19.255.255 CIDR: 198.18.0.0/15 NetName: SPECIAL-IPV4-BENCHMARK-TESTING-IANA-RESERVED Can i…
Gaurav Kansal
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Packets sent in IPv4

I'm just trying to understnd how packets work. So if i hypothetically had a image of a size of 1mb which is 1,000,000 bytes and the maximum packet size for a IPv4 packet is 65,536 bytes does that mean that optimally there would be only 16 packets…
Ferroxel
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Why "my IP Address.com" is showing that I've 2 IP address?

A device is assigned unique and single IP address then why my device has 2?
defalt
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Why are Class E IPs in use?

According to all documentation, class E IPs - those in the range 240.0.0.0 to 255.255.255.255 - are for research purposes only and should never be assigned or used. And yet, according to a review of access logs in a site I run, upwards of 70% of…
sgfit
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How can I appear to be coming from a certain IP address?

I have a friends IP and I want to appear to be coming from his specific IP to the outside world. How can I do that besides actually taking over his computer? Thanks!
user418715
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