Basic overview of computers

IP address
-Every computer has its own IP address (unique identifier).
-Analog: person's NRIC number
-For example: 74.125.24.103

Hostname
-The purpose of assigning hostname to IP address is to make them easier for people to remember.
-Example of hostname: www.google.com, GHSEP, Eagle
-Analog: Alice

Domain Name System (DNS)  
-The Domain Name System (DNS) is the internet's version of the Yellow Pages.
-Is to find the IP address associated with hostname (e.g. Eagle maps to 192.168.1.88).

Dynamic Host Configuration Protocol (DHCP)  
-A DHCP Server is a network server that automatically provides and assigns IP addresses, default gateways and other network parameters to client computers.

Firewall
-Allow you to block or allow certain types of network traffic for incoming & outgoing.
 
A ping is a signal sent to a host that requests a response (e.g. ping Eagle8).