diff --git a/_posts/2015-01-02-internet.md b/_posts/2015-01-02-internet.md
index a60f2a7..cc28771 100644
--- a/_posts/2015-01-02-internet.md
+++ b/_posts/2015-01-02-internet.md
@@ -38,7 +38,9 @@ Although any device connected to the Internet can be both a client and a server
 
 Like every house has a specific and _unique_ postal address, each computer connected to the Internet is given an **IP address**, in order to be identified on the network.
 
-An IP address usually looks like a combination of 4 numbers: `91.198.174.192`.
+There are two versions of IP addresses: IP version 4 and IP version 6.
+
+A version 4 address is a combonation of 4 numbers ranging from 0 to 255 called "Octets". For example: `91.198.174.192`. A version 6 address is a combonation of 8 hexedicmal numbers called "Hextets". For example: `2001:0db8:0000:0000:0000:0000:0000:0001`.
 
 ### Domains
 
@@ -142,4 +144,4 @@ The difference with IP addresses is that domains are easier to read for **humans
 
 [^1]: Apart from oceans obviously.
 
-*[SMTP]: Simple Mail Transfer Protocol
\ No newline at end of file
+*[SMTP]: Simple Mail Transfer Protocol