IP-adresser2 min. læsetid
Why does my IP address change?
Dynamic leases, router restarts, mobile networks and IPv6 privacy addresses: the everyday reasons your IP isn't constant.
Guides
Praktiske forklaringer på, hvordan internettet faktisk fungerer.
Denne tekst findes endnu ikke på dansk. Den vises på engelsk, indtil en oversættelse er udgivet.
- IP-adresser2 min. læsetid
Public vs private IP addresses
Why your laptop's address starts with 192.168 while websites see something else — and what that means for connectivity and privacy.
- IP-adresser2 min. læsetid
CIDR and subnets, explained with examples
What /24 means, how to calculate network and broadcast addresses, and how to split a network into subnets — without memorising tables.
- Privatliv2 min. læsetid
How IP geolocation works — and why it's often wrong
Location databases don't know where you are. They know where an address block is probably used. The difference matters.
- Routing2 min. læsetid
What is an ASN (autonomous system number)?
The internet is about 80,000 independent networks agreeing to carry each other's traffic. Each one has a number. Here's what it means.
- IP-adresser2 min. læsetid
IPv4 vs IPv6: what actually changes
Address size is the headline, but the real differences are in how networks are numbered, how devices configure themselves, and what happens to NAT.
- IP-adresser2 min. læsetid
What is an IP address?
The number that identifies your connection on the internet — what it is, who assigns it, and what it does and doesn't reveal about you.