IP Addresses and You!
Aaron Staines
NETWORK/SYSTEM ENGINEER | CCISO
Module
Overview
What is an IP Address
What is a Subnet Mask
What is a Gateway
What is DNS
What is an IP Address
What is an IP Address
IPv4 – Old School Cool
52.26.212.30 – Separated by 4 Decimals
2 Types – Private / Public
What is an IP Address
Private – Not Routable on Internet
Public IP – External Use Only
Planes Trains Automobiles
Don’t Break 911
What is an IP Address
IPv6 – New Standard
IPv4 Public IP - 4,294,967,296
IPv6 Public IP 340,282,366,920,938,463,463,374,607,431,76
8,211,456
What is an IP Address
IPv6 – 8 Sets of 4 Hexadecimal Separated by a :
General Rule – IPv4 internally / IPv6 Externally
What is a Subnet Mask
What is a Subnet Mask
Think Range
2 Common Subnets
1st Type – 255.255.255.0 254 Useable Addresses
2nd Type – 255.255.254.0 510 Useable Addresses
What is a Subnet Mask
Limit Break
/23 - Don’t go below
Larger Network More Noise – AD / Updates
Think Country Road
What is a Gateway
What is a Gateway
Layer 3 Device – Router / Sometimes Switch
Role – Pass Traffic
Local Subnet Doesn’t Use Gateway
What is a Gateway
Local
172.20.10.1
Sprint
68.29.129.4
Sprint
Hidden
Sprint
144.232.6.194
Sprint
66.1.34.5
Google
72.14.209.5
Sprint
144.228.22.29
Google
Unknown
Sprint
Sprint
144.232.18.5 144.232.22.132
Google
8.8.8.8
What is DNS
What is DNS
Crucial Component
Converts Names to IP Addresses
Works with IPv4 and IPv6
Module
Review
IPv4 & IPv6
Public VS Private IP Addresses
Don’t Break 911
Subnet Mask
Module
Review
Larger Subnets More Noise
How a Gateway Functions
DNS – Converts Name to IP