TechKnowSurge
CompTIA Network+ 1.7 Cisco CCNA 1.6 Cisco CCST Networking 2.2
TechKnowSurge Catalog Videos DEMO: Address Types, Part 1
VideoNetworkFree

DEMO: Address Types, Part 1

This content covers how to identify network, host, and broadcast addresses from a given IP address, using classful addressing rules as they appear on certification exams.

⚑ Complete this video to capture a CTF flag worth 1 point.

About this video

Classful IP addressing divides the 32-bit IPv4 address space into classes, with each class defining how many octets belong to the network portion and how many belong to the host portion. Class B addresses, for instance, assign the first two octets to the network and the last two to hosts. Correctly identifying an address as a network address, host address, or broadcast address requires analyzing those host octets and determining whether they represent the first value, the last value, or any value in between within that range. The broadcast address is always the last address in a given network range, meaning all host bits are set to one. The network address is the first address, with all host bits set to zero. Any address that falls between these two endpoints is a valid host address. A common point of confusion arises when an address appears to have all-ones in the final octet but contains a non-terminal value in an earlier host octet, making it a host address rather than a broadcast. Mastering this distinction is essential for both practical network configuration and accurate performance on certification exams.

What you'll learn

What's covered

IP Address Classification

Aligned to

CompTIA Network+
1.7 Given a scenario, use appropriate IPv4 network addressing.
Cisco CCNA
1.6 Configure and verify IPv4 addressing and subnetting.
Cisco CCST Networking
2.2 Identify IPv4 addresses and subnet formats.

Key terms

IP Address
A numerical label assigned to each device connected to a network that uses the Internet Protocol.
Octet
One of the four 8-bit sections of an IPv4 address, each separated by a dot in dotted decimal notation and representing a decimal value from 0 to 255. For example, in 192.168.1.1, the four octets are 192, 168, 1, and 1.
Network Address
The first address in an IP network range that identifies the network itself and cannot be assigned to a host. It is formed when all host bits are set to zero.
Broadcast Address
The last address in an IP subnet range, formed when all host bits are set to one, used to send a single packet to every device on that network simultaneously.
Host Address
An IP address assigned to a specific device on a network; the host portion is neither all zeros nor all ones.
Subnet Mask
A 32-bit number that divides an IP address into network and host portions.

Transcript

This task emulates some of the test questions I've seen on certification tests. We're going to go through this together and identify what's the network address, what's the host address, and what is the broadcast address, similar to what we did before but presented in a little different way and a little bit closer to what you would see on a certification test.

What we'll do with this is take a look at this address right here, determine what type of address it is, and then write it down right here. In this example right here, the address is 144.22.255.255. We know, by looking that up, that this is a Class B, which means that the first two octets are the network portion of this address, and we see that the host portion is the last address of the range: it's all ones. Because of that, I'm going to write in that this is a broadcast address. Then I would just write into here whether it's a broadcast address, whether it's a host address, or whether it's a network address. Go ahead and go through all of this, then check your work and see how you did.

Hopefully you got those all correct, especially that last one. I threw that one in because it's a little tricky: it looks like it could be a broadcast address, but it's actually a host address. If you look at that zero in the second octet, it's not the last address of the range, and so that is a host address there. Make sure you understand that, and make sure you're getting those correct. If not, practice this more. This is going to be, once again, a concept that we're going to continue to build on as we go through this course.

About TechKnowSurge

TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.

Explore free tools and programs →