301‐reading 3 - Skalyx866/Notes GitHub Wiki

What is CIDR notation? a CIDR block?

A CIDR notation is a way to represent a CIDR block which is just a range of IP addresses

How many octets are found in an IPv4 address?

Eight octets are found in an IPv4 address

Setting binary aside and using the decimal system, what is the range of numbers found in an octet?

The range of numbers found in an octet is 0-255

What does the final digit after the “/” represent in an IPv4 address?

It represents the subnet mask of the IP address

How many IP addresses are in the CIDR block 10.0.0.0/24?

256 IP addresses are in the CIDR block 10.0.0.0/24

Source: CIDR Block Notation Explained in 2 Minutes

In your own words, describe network segmentation.

Network segmentation is just different networks that are separated by a router or by a firewall

Network segmentation isn’t important as long as the network is using a well configured firewall. Do you agree? Why or why not?

No, I do believe network segmentation is important because if someone gets past the firewall, if you have a segmented network, then they might not get into the second network or realize it is there.

What is a screened subnet?

A screened subnet is a protected network segment that is facing towards the internet or public facing.

Cameras, ID card scanners, locked doors and biometrics are just a few examples of what type of security?

They are an example of physical security.

Source: What Is Network Segmentation and Why It Matters?

What I would like to learn more about

I would like to learn more about segmenting the network and the different security behind them