Netpractice

Abstract

The Netpractice 42 project is a general practical exercise to let you discover networking. You will have to configure small-scale networks. To do so, it will be necessary to understand how TCP/IP addressing works.

You will have to complete 10 levels (i.e. 10 exercises) and turn them in your Git repository.

My learning resource 📑

This resource is coverage all knowledge that you should know. It short and good explaination

• Classless Inter-Domain Routing
• Subnet mask sheet
• CIDR
• Broadcast Address

Concepts

Configuration

1. Client IP address must not overlap to other
2. Switch can only connect clients in same subnet
3. Router can connect between subnets
4. Route table is configured from source to destination IP address using CIDR notation (0.0.0.0/0)
5. Private IP address can't access the internet
   • from 10.0.0.0 to 10.255.255.255
   • from 172.16.0.0 to 172.31.255.255
   • from 192.168.0.0 to 192.168.255.255
6. Local IP address must no be used by physical interfaces
   • from 127.0.0.1 to 127.255.255.254

Step to solve problem

1. Check CIDR or Subnet mask
2. Check specific client ip that is assigned
3. calculate available ip range in subnet
4. Config route table follow by problem goals

How to pass the evaluation

1. Memorize CIDR table
2. Practice level 6 to 10 from thinking to muscle memory

CIDR Sheet table

	Address	Host	Netmask
/30	4	2	255.255.255.252
/29	8	6	255.255.255.248
/28	16	14	255.255.255.240
/27	32	30	255.255.255.224
/26	64	62	255.255.255.192
/25	128	126	255.255.255.128
/24	256	254	255.255.255.0
/18	16384	16382	255.255.192.0
/16	65536	65534	255.255.0.0

Get started

With these resources you can get through it in every level but it not easy anyway

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~~ Good luck

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Learn Basic Network 📖

You also can learn basic network config in level 1 - 5

Level 1

Every client need to be set as different ip address.

Level 2

Border ip is cannot be used because it is reserved for network transmission.

Level 3

Border ip is cannot be used because it is reserved for network transmission.

Level 4

Border ip is cannot be used because it is reserved for network transmission.

Level 5

Border ip is cannot be used because it is reserved for network transmission.

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Challenge ya self 🎲

I would like to provide a hint for every level from 6 - 10

Hint

Level 6

Level 7

Level 8

Level 9

Level 10

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Burn da problem ⚔️

Peek the answer to check your solution and earn your point.

Solution

Level 6

Level 7

Level 8

Level 9

Level 10