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Delwin Thermitus
Cyber Security
What Is An IP Address?
-
IP Address represents where you live on the internet
o Are needed to send messages to computers outside your own network
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Slowing down the rate IP is used up is called NAT
IPv4 Overview
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32 Binary Bits
o Each address is unique
o Shown in this format (192
...
1
...
Static IP Address: You set them up yourself
a
...
Dynamic IP Address
a
...
9% of the time
b
...
Home network
▪ Phone, Printer, Laptop, Desktop, Computer
IP Address’
o Is a logical address of a device in the network
o Sends request
Switch (Device)
o Connects devices within the same network
o Sends request
Router (gateway)
o Is a networking device that forwards data packets between ‘different’ computers
networks
o sits between our LAN to our outside
Subnet Mask
o Whether a machine sits in the LAN or an outside network
o Defines the range
Any Network Device Needs 3 Things
- IP Address
- Subnet Mask
- Gateway: IP of the router
o Can talk to any device within LAN and outside
WAN
- Is important computer network that is spread across a large geographical area
...
Telephone Lines and Radio waves
▪ Mostly established with high-end telecommunication circuits
NAT
o Is a method of remapping an IP Address while they are in transit across a traffic
routing device
Firewall
o Set of passive rules to protect networks from unauthorized access
DMZ (Demilitarized Zone)
▪ Is a subnetwork that contains and exposes a device to an untrusted,
network such as the internet
• Any external network connections want to establish the
connections want to establish the connection with the LAN, you
pass on that connection through the DMZ
Point Forward
▪
Redirects a communication request from one address and port number
combination to another while the packets are traversing a network
gateway, such as router or firewall
IP Address
-
Binary Basics
IPv4 structure
IP Classes
- Public vs
...
IPv6