lulutalu/42_netpractice

NetPractice

Objectives

Learning how to configurate network of small size.
For this, I'll need to learn how TCP/IP protocol works.

Results

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Theory

Ip address

Ip addresses are a combination of 4 octets separated by dots as seen below.

Reminder : an octets is composed of 8 binary digits example below

128	64	32	16	8	4	2	1
0	0	0	0	0	0	0	0

Value of this octet = 0

128	64	32	16	8	4	2	1
0	1	0	1	0	1	0	0

Value of this octet = 84

128	64	32	16	8	4	2	1
1	1	1	1	1	1	1	1

Value of this octet = 255

128	64	32	16	8	4	2	1
0	0	1	1	1	1	1	1

Value of this octet = 63 (This is a interesting behavior to keep in mind)

Subnet Mask

Now, we need to understand how to assign IP addresses for computers inside of a Network.

To be able to differentiate between the Network number and the Hosts number we'll use subnetting and IP's masks.

All IP addresses possess a Mask. The syntax for a Mask is the same as for the IP address (4 octets seperated by dots).

The mask can also be written in CIDR example below.