From cf9e22771b8e4334c8dff6a134db2d17378fb120 Mon Sep 17 00:00:00 2001 From: Nick Leeman Date: Sat, 6 Nov 2021 15:02:11 +0100 Subject: [PATCH] Vault sync: 2021-11-06 15:02:11 --- School/Analyse/Layers/3. Network Layer.md | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/School/Analyse/Layers/3. Network Layer.md b/School/Analyse/Layers/3. Network Layer.md index 1800dfd..655e582 100644 --- a/School/Analyse/Layers/3. Network Layer.md +++ b/School/Analyse/Layers/3. Network Layer.md @@ -84,7 +84,18 @@ We now do have a addressing issue because: So we need a new type of ID to uniquely identify a host in the internet. -This address will we at a higher level of protocols - +This address will we at a higher level of protocols (Network layer) and is therefore protocol dependent. + +### IPV4 +IPV4 are 4 byte integers. We use them in the following format: +0-255.0-255.0-255.0-255 ex. 192.168.100.1 + +This is called a dotted decimal, each address contains 4 decimals of 8 bits (octets) +Example: 00000000.00000000.00000000.00000000 + +## Classful addresses +Classfull addresses define 3 networks types + +Class A: First decimal shows the network ID, remaining 3 decimals show the host ID. (Large networks)