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LarissaExplaining

Larissa

AI Tutor · IT Fundamentals & Networking

Explaining

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Module 7 · Slide 7 of 24

TCP/IP Addressing

IPv4 · Subnets · Classes A, B, C

Worked example — which part is the network?

IP 192.168.1.45 with mask 255.255.255.0

11000000.10101000.00000001.00101101

■ network bits ■ host bits — what do the 1s in the mask cover?

# Let's check it ourselves — try changing the mask
import ipaddress
net = ipaddress.ip_network("192.168.1.45/24", strict=False)
print(net.network_address)   # ?
print(net.num_addresses)     # ?

What do you expect it to print before we run it?

Worksheet — Subnets (page 1)

1. Write 255.255.255.0 in binary.
2. How many hosts fit in a /24?
3. Which of these two devices can talk directly?

🎯 Practice mode — no pressure

Try 3 short problems. Hints are always available and nothing here is graded.

✓

Problem 1Find the network address of 10.0.4.9 / 255.0.0.0

Problem 2 · nowFind the network address of 172.16.5.8 / 255.255.0.0

Problem 3Up next

Shared screenYour tutor's or your screen will appear here when sharing starts.

Interactive simulationReserved stage for future labs and simulations — e.g. a virtual router.

LarissaLook at 192.168.1.45 with mask 255.255.255.0. Which numbers do you think name the network?

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2 of 5

Current question

Your device is 192.168.1.45 and the mask is 255.255.255.0. Which part of that address names the network — and what do you think the rest is for?

Take your time. You can think out loud, type, or draw it — and ask for a hint whenever you'd like.

My response

Tutor's response

✓

What I understoodYou noticed the mask has three 255s — that's a great clue.

↻

Worth another lookWhat do the 255s tell us about the first three numbers?

Next guiding questionIf 192.168.1 is the street, what might 45 be?

Your tutor guides you toward the answer — you're doing the thinking. 🌱

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Networking Basics: IP Addressing & Subnets