1. 소개

Netwhat will allow you to discover the network and to learn about its inner workings. This will allow you to understand how some things work that you already use in your everyday life.

2. What is ...

아래의 개념들을 공부하고 블로그에 정리했다.

• What is an IP address
• What is a Netmask
• What is the subnet of an IP with Netmask
• What is the broadcast address of a subnet
• What are the different ways to represent an ip address with the Netmask
• What are the differences between public and private IPs
• What is a class of IP addresses
• What is TCP ◦ What is UDP
• What are the network layers
• What is the OSI model
• What is a DHCP server and the DHCP protocol
• What is a DNS server and the DNS protocol
• What are the rules to make 2 devices communicate using IP addresses
• How does routing work with IP
• What is a default gateway for routing
• What is a port from an IP point of view and what is it used for when connecting to another device

3. 연습문제 정리

1. IP adress
   선행지식
   1.1. IP주소 크기 구하기
   1.2. IP주소 클래스 구하기
   
2. Subnetting
   선행지식
   2.1 서브넷마스크 표기법
   2.2. 네트워크/브로드캐스트 주소 구하기
   2.3. 호스트 주소 수 구하기
   2.4. 호스트주소 범위 구하기
   
3. Public/Private IP address
   선행지식
   3.1. 사설 IP주소 고르기
   
4. Transport Layer
   선행지식
   4.1. TCP/UDP 특징
   
5. Application Layer
   선행지식
   5.1. DNS/DHCP 특징