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Summary - IT Concepts

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Subnetting Basics: Explains IP address classes, subnet masks, and binary-to-decimal conversions. Practical Exercises: Offers hands-on problems to calculate subnets, network addresses, and host ranges. Advanced Topics: Covers Variable Length Subnet Masking (VLSM) and route summarization for efficient IP address management. Real-World Applications: Demonstrates how subnetting is used in network design and troubleshooting.

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001
1010100
10011000 10001111100
1011100101011100
101100011101001
1011110100011010
00001010010110010
1001010101100111
1111010101000101
1101001101010011
001010010101010
1010101000110010
010101001011000
110101100011010
11010100001011
001010100110
1001010010




IP Addressing
and
Subnetting
Workbook
Version 1.1



Instructor’s Edition

11111110
10010101
00011011
10000110
11010011

, IP Address Classes
Class A 1 – 127 (Network 127 is reserved for loopback and internal testing)
Leading bit pattern 0 00000000.00000000.00000000.00000000
Network . Host . Host . Host


Class B 128 – 191 Leading bit pattern 10 10000000.00000000.00000000.00000000
Network . Network . Host . Host

Class C 192 – 223 Leading bit pattern 110 11000000.00000000.00000000.00000000
Network . Network . Network . Host

Class D 224 – 239 (Reserved for multicast)

Class E 240 – 255 (Reserved for experimental, used for research)




Private Address Space
Class A 10.0.0.0 to 10.255.255.255

Class B 172.16.0.0 to 172.31.255.255

Class C 192.168.0.0 to 192.168.255.255



Default Subnet Masks
Class A 255.0.0.0

Class B 255.255.0.0

Class C 255.255.255.0




Produced by: Robb Jones

Frederick County Career & Technology Center
Cisco Networking Academy
Frederick County Public Schools
Frederick, Maryland, USA

Special Thanks to Melvin Baker and Jim Dorsch
for taking the time to check this workbook for errors.
Inside Cover

, Binary To Decimal Conversion
128 64 32 16 8 4 2 1 Answers Scratch Area
1 0 0 1 0 0 1 0 146 128 64
16 32
0 1 1 1 0 1 1 1 119 2 16
146 4
1 1 1 1 1 1 1 1 255 2
1
1 1 0 0 0 1 0 1 197 119

1 1 1 1 0 1 1 0 246

0 0 0 1 0 0 1 1 19

1 0 0 0 0 0 0 1 129

0 0 1 1 0 0 0 1 49

0 1 1 1 1 0 0 0 120

1 1 1 1 0 0 0 0 240

0 0 1 1 1 0 1 1 59

0 0 0 0 0 1 1 1 7

00011011 27

10101010 170

01101111 111

11111000 248

00100000 32

01010101 85

00111110 62

00000011 3

11101101 237

11000000 192
1

, Decimal To Binary Conversion
Use all 8 bits for each problem
128 64 32 16 8 4 2 1 = 255 Scratch Area
1 1 1 0 1 1 1 0
_________________________________________ 238 238 34
-128 -32
0 0 1 0 0 0 1 0
_________________________________________ 34 110 2
-64 -2
0 1 1 1 1 0 1 1
_________________________________________ 123 46 0
-32
0 0 1 1 0 0 1 0
_________________________________________ 50 14
-8
1 1 1 1 1 1 1 1
_________________________________________ 255 6
-4
1 1 0 0 1 0 0 0
_________________________________________ 200 2
-2
0 0 0 0 1 0 1 0
_________________________________________ 10 0

1 0 0 0 1 0 1 0
_________________________________________ 138

0 0 0 0 0 0 0 1
_________________________________________ 1

0 0 0 0 1 1 0 1
_________________________________________ 13

1 1 1 1 1 0 1 0
_________________________________________ 250

0 1 1 0 1 0 1 1
_________________________________________ 107

1 1 1 0 0 0 0 0
_________________________________________ 224

0 1 1 1 0 0 1 0
_________________________________________ 114

1 1 0 0 0 0 0 0
_________________________________________ 192

1 0 1 0 1 1 0 0
_________________________________________ 172

0 1 1 0 0 1 0 0
_________________________________________ 100

0 1 1 1 0 1 1 1
_________________________________________ 119

0 0 1 1 1 0 0 1
_________________________________________ 57

0 1 1 0 0 0 1 0
_________________________________________ 98

1 0 1 1 0 0 1 1
_________________________________________ 179

0 0 0 0 0 0 1 0
_________________________________________ 2
2

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March 21, 2025
Number of pages
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Written in
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Type
Summary
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