IP addressing basics Binary to decimal conversion Decimal to binary conversion Decimal to hexadecimal conversion Address class identification Network & host identification Default subnet mask identification Network id identification First and last host id identification Subnet directed broadcast IP address identification Apply your knowledge

1. See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/295339455
IP4 ADDRESSING AND SUBNETTING WORKBOOK
Book · February 2016
CITATIONS
0
READS
754
1 author:
Some of the authors of this publication are also working on these related projects:
AN EFFICIENT AND RELIABLE DATA FLOW PROTECTION SCHEME FOR MPLS NETWORKS View project
Rajasekar Ramalingam
Sur College of Applied Sciences, Sur, Oman
14 PUBLICATIONS 5 CITATIONS
SEE PROFILE
All content following this page was uploaded by Rajasekar Ramalingam on 21 February 2016.
The user has requested enhancement of the downloaded file.

2. IPv4 ADDRESSING & SUBNETTING
Workbook
Compiled by:
Mr. RAJASEKAR RAMALINGAM
Faculty - Department of IT, College of Applied Sciences – Sur,
Post Box: 484 Post Code: 411, Sultanate of Oman.
vrrsekar@yahoo.com / rajasekar.sur@cas.edu.om

3. INDEX
# TOPIC PAGE NO.:
1 IP addressing basics 1
2 Binary to decimal conversion 3
3 Decimal to binary conversion 4
4 Decimal to hexadecimal conversion 5
5 Address class identification 6
6 Network & host identification 7
7 Default subnet mask identification 9
8 Network id identification 10
9 First and last host id identification 11
10 Subnet directed broadcast IP address identification 12
11 Apply your knowledge 13
12 Subnetting 14
13 VLSM: variable length subnet mask 27
14 Apply your knowledge 31

4. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 1
1) IP ADDRESSING BASICS
 Define IP Address:
___________________________________________________________________________________
___________________________________________________________________________________
 Find the IP Address of your computer and write it.
___________________________________________________________________________________
___________________________________________________________________________________
Other facts:
 ________________________ Addressing.
 2 Versions: 1) ____________________ 2) ____________________.
 IP Version used in our college: __________________________.
 IP Addresses are used to identify _________________ in networks.
 Assigned by __________________________________.
 Length of IPv4 address: ____________________.
 Length of IPv6 Address: ____________________.
 IPv4 Address of broken into ___________________ octets (8 Bits).
 General format of IPv4 is ___________________________.
 Uses _______________________________format.
 Example IP Address: ________________________.
 Range of value per octet: __________________________.
 Two types of IPv4 Address: 1) _____________________________ 2) _______________________.

5. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 2
CLASS
Range
(1st
Octet)
Higher
Order
Bit (1st
Octet)
# of
Network
Bits
# of
Host
Bits
Default
Subnet Mask
CIDR
Value
Total # of
Networks
Total # of
Host per
Network
Private IP Address
0.0.0.0 : ______________________________________
127.0.0.0 – 127.255.255.255 : ______________________________________
255.255.255.255 : ______________________________________

6. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 3
2) Binary To Decimal Conversion
a) 10010010 b) 01110111 c) 11111111 d) 11000101
e) 00011011 f) 10101010 g) 01101111 h) 11111000
i) 00100000 j) 01010101 k) 00111110 l) 00000011
m)11101101 n)11000000 o) 00011100 p) 10101010
128 64 32 16 8 4 2 1 Answer Scratch Area
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
l)
m)
n)
o)
p)

7. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 4
3) Decimal To Binary Conversion
a) 238 b) 34 c) 123 d) 50 e) 255 f) 200 g) 10
h) 138 i) 1 j) 13 k) 250 l) 98 m) 15 n) 79
128 64 32 16 8 4 2 1 Answer Scratch Area
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
l)
m)
n)
o)

8. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 5
4) Decimal to Hexadecimal Conversion
a) 197 b) 220 c) 79 d) 129 e) 148 f) 119 g) 97
h) 168 i) 172 j) 201
Decimal  Binary  Hexadecimal
128 64 32 16 8 4 2 1 Binary Value Hexadecimal
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
Decimal Binary Hexadecimal
0 0000 0
1 0001 1
2 0010 2
3 0011 3
4 0100 4
5 0101 5
6 0110 6
7 0111 7
8 1000 8
9 1001 9
10 1010 A
11 1011 B
12 1100 C
13 1101 D
14 1110 E
15 1111 F

9. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 6
5) Address Class Identification
Identify the Class of the following IP Addresses.
Address Class
a) 10.250.1.1 _____
b) 150.10.15.0 _____
c) 192.14.2.0 _____
d) 148.17.9.1 _____
e) 193.42.1.1 _____
f) 126.8.156.0 _____
g) 220.200.23.1 _____
h) 230.230.45.58 _____
i) 177.100.18.4 _____
j) 119.18.45.0 _____
k) 249.240.80.78 _____
l) 199.155.77.56 _____
m) 117.89.56.45 _____
o) 215.45.45.0 _____
p) 199.200.15.0 _____
q) 95.0.21.90 _____
r) 33.0.0.0 _____
s) 158.98.80.0 _____
t) 219.21.56.0 _____
Class Range
A
B
C
D
E

10. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 7
6) NETWORK & HOST IDENTIFICATION
6.1 Circle the Network portion of these addresses:
a) 177. 100. 18. 4
b) 119. 18. 45. 0
c) 209. 240. 80. 78
d) 199. 155. 77. 56
e) 117. 89. 56. 45
f) 215. 45. 45. 0
g) 192. 200. 15. 0
h) 95. 0. 21. 90
i) 33. 0. 0. 0
j) 158. 98. 80. 0
k) 217. 21. 56. 0
l) 10. 250. 1. 1
m) 150. 10. 15. 0
n) 192. 14. 2. 0
o) 148. 17. 9. 1
p) 193. 42. 1. 1
q) 126. 8. 156. 0
r) 220. 200. 23. 1
Class SNM
A 255.0.0.0
B 255.255.0.0
C 255.255.255.0

11. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 8
6.2 Circle the host portion of these addresses
a) 10. 15. 123. 50
b) 171. 2. 199. 31
c) 198. 125. 87. 177
d) 223. 250. 200. 222
e) 17. 45. 222. 45
f) 126. 201. 54. 231
g) 191. 41. 35. 112
h) 155. 25. 169. 227
i) 192. 15. 155. 2
j) 123. 102. 45. 254
k) 148. 17. 9. 155
l) 100. 25. 1. 1
m) 195. 0. 21. 98
n) 25. 250. 135. 46
o) 171. 102. 77. 77
p) 55. 250. 5. 5
q) 218. 155. 230. 14
r) 10. 250. 1. 1
Class SNM
A 255.0.0.0
B 255.255.0.0
C 255.255.255.0

12. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 9
7) Default Subnet Mask Identification
Write the correct Default Subnet Mask & CIDR Value for each of the following addresses:
IP Address Subnet Mask CIDR Value
a) 177.100.18.4 _____________________________ __________
b) 119.18.45.0 _____________________________ __________
c) 191.249.234.191 _____________________________ __________
d) 223.23.223.109 _____________________________ __________
e) 10.10.250.1 _____________________________ __________
f) 126.123.23.1 _____________________________ __________
g) 223.69.230.250 _____________________________ __________
h) 192.12.35.105 _____________________________ __________
i) 77.251.200.51 _____________________________ __________
j) 189.210.50.1 _____________________________ __________
k) 88.45.65.35 _____________________________ __________
l) 128.212.250.254 _____________________________ ___________
m) 193.100.77.83 _____________________________ ___________
n) 125.125.250.1 _____________________________ ___________
o) 1.1.10.50 _____________________________ __________
p) 220.90.130.45 _____________________________ ___________
q) 134.125.34.9 _____________________________ __________
r) 95.250.91.99 _____________________________ __________

13. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 10
8) Network id Identification
Identify the Network Id of the following IP Addresses.
IP Address Network ID
a) 177.100.18.4 _____________________________
b) 119.18.45.0 _____________________________
c) 191.249.234.191 _____________________________
d) 223.23.223.109 _____________________________
e) 10.10.250.1 _____________________________
f) 126.123.23.1 _____________________________
g) 223.69.230.250 _____________________________
h) 192.12.35.105 _____________________________
i) 77.251.200.51 _____________________________
j) 189.210.50.1 _____________________________
k) 88.45.65.35 _____________________________
l) 128.212.250.254 _____________________________
m) 193.100.77.83 _____________________________
n) 125.125.250.1 _____________________________
o) 1.1.10.50 _____________________________
p) 220.90.130.45 _____________________________
q) 134.125.34.9 _____________________________
r) 95.250.91.99 _____________________________

14. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 11
9) first and last host id Identification
Identify the First Host Id and Last Host Id of the following IP Addresses.
IP Address Network ID First Host Id Last Host Id
a) 177.100.18.4 _________________ _____________ ________________
b) 119.18.45.0 _________________ _____________ ________________
c) 191.249.234.191 _________________ _____________ ________________
d) 223.23.223.109 _________________ _____________ ________________
e) 10.10.250.1 _________________ _____________ ________________
f) 126.123.23.1 _________________ _____________ ________________
g) 223.69.230.250 _________________ _____________ ________________
h) 192.12.35.105 _________________ _____________ ________________
i) 77.251.200.51 _________________ _____________ ________________
j) 189.210.50.1 _________________ _____________ ________________
k) 88.45.65.35 _________________ _____________ ________________
l) 128.212.250.254 _________________ _____________ ________________
m) 193.100.77.83 _________________ _____________ ________________
n) 125.125.250.1 _________________ _____________ ________________
o) 1.1.10.50 _________________ _____________ ________________
p) 220.90.130.45 _________________ _____________ ________________
q) 134.125.34.9 _________________ _____________ ________________
r) 95.250.91.99 _________________ _____________ ________________

15. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 12
10) SUBNET DIRECTED BROADCAST IP ADDRESS IDENTIFICATION
Find the Subnet Directed Broadcast IP address of the following Networks.
IP Address Network ID
a) 177.100.18.4 _____________________________
b) 119.18.45.0 _____________________________
c) 191.249.234.191 _____________________________
d) 223.23.223.109 _____________________________
e) 10.10.250.1 _____________________________
f) 126.123.23.1 _____________________________
g) 223.69.230.250 _____________________________
h) 192.12.35.105 _____________________________
i) 77.251.200.51 _____________________________
j) 189.210.50.1 _____________________________
k) 88.45.65.35 _____________________________
l) 128.212.250.254 _____________________________
m) 193.100.77.83 _____________________________
n) 125.125.250.1 _____________________________
o) 1.1.10.50 _____________________________
p) 220.90.130.45 _____________________________
q) 134.125.34.9 _____________________________
r) 95.250.91.99 _____________________________

16. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 13
11) Apply your knowledge
Solve the following problems.
1) Give Network ID : 138.169.0.0
Class: ________________________________ SNM: ____________________________________
First HID: ____________________________ Last HID:_________________________________
Broadcast IP:__________________________ No of hosts: _______________________________
2) Give Network ID : 206.207.0.0
Class: ________________________________ SNM: ____________________________________
First HID: ____________________________ Last HID:_________________________________
Broadcast IP:__________________________ No of hosts: _______________________________
3) Give Network ID : 189.0.0.0
Class: ________________________________ SNM: ____________________________________
First HID: ____________________________ Last HID:_________________________________
Broadcast IP:__________________________ No of hosts: _______________________________
4) Give Network ID : 203.0.0.0
Class: ________________________________ SNM: ____________________________________
First HID: ____________________________ Last HID:_________________________________
Broadcast IP:__________________________ No of hosts: _______________________________
5) Give Network ID : 208.255.0.0
Class: ________________________________ SNM: ____________________________________
First HID: ____________________________ Last HID:_________________________________
Broadcast IP:__________________________ No of hosts: _______________________________

17. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 14
12) SUBNETTING
 Subnetting is a procedure to support the subnetting or division of a single Class A, B, or C
network number into smaller pieces.
 Instead of the Classful two-level hierarchy, subnetting supports a three-level hierarchy.
 Below Figure, illustrates the basic idea of subnetting, which is to divide the standard classful
host number field into two parts-the subnet number and the host number on that subnet.
Problem 1 :
Network Address : 192.10.10.0
Number of needed subnets : 14
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________

18. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 15
Problem 2:
Network Address : 130.150.0.0
Number of needed subnets : 62
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Problem 3:
Network Address : 35.0.0.0
Number of needed subnets : 30
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________

19. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 16
Problem 4:
Network Address : 22.0.0.0
Number of needed subnets : 6
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
Subnet Id (Subnet 4) : ________________________________________
Subnet Id (Subnet 5) : ________________________________________
Subnet Id (Subnet 6) : ________________________________________
Show your work in the space below.

20. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 17
Problem 5:
Network Address : 140.10.0.0
Number of needed subnets : 8
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
Subnet Id (Subnet 4) : ________________________________________
Subnet Id (Subnet 5) : ________________________________________
Subnet Id (Subnet 6) : ________________________________________
Subnet Id (Subnet 7) : ________________________________________
Subnet Id (Subnet 8) : ________________________________________
Show your work in the space below.

21. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 18
Problem 6:
Network Address : 200.100.100.0
Number of needed subnets : 6
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
Subnet Id (Subnet 4) : ________________________________________
Subnet Id (Subnet 5) : ________________________________________
Subnet Id (Subnet 6) : ________________________________________
Show your work in the space below.

22. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 19
Problem 7:
Network Address : 12.0.0.0
Number of needed subnets : 2
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Show your work in the space below.

23. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 20
Problem 8:
Network Address : 135.20.0.0
Number of needed subnets : 6
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 4) : ________________________________________

24. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 21
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 5) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 6) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Show your work in the space below.

25. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 22
Problem 9:
Network Address : 192.168.1.0
Number of needed subnets : 14
Complete the following:
Address class :________________________________________
Default subnet mask : ________________________________________
Number of bits borrowed : ________________________________________
Custom / New Sub NetMask : ________________________________________
CIDR Value : ________________________________________
Subnet Id (Subnet 1) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 2) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 4) : ________________________________________

26. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 23
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 5) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 6) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 7) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 8) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 9) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________

27. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 24
Broadcast IP : ________________________________________
Subnet Id (Subnet 10) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 11) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 12) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 13) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
Subnet Id (Subnet 14) : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________

28. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 25
Problem 10:
Given IP Address: 172.185.128.0
Subnet Required: 10
Find the Subnet Id, First Host Id, Last Host Id, Broadcast IP of 1st
, 2nd
, 13th
and 14th
Subnets.
Find the New Subnet Mask.

29. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 26
Problem 11:
Given IP Address: 192.168.1.7
Subnets Required: 10
Find the Subnet Id, First Host Id, Last Host Id, Broadcast IP of 1st
, 2nd
& 10th
Subnets.
Find the new subnet mask.

30. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 27
13) VLSM: Variable Length Subnet Mask
Problem 1:
Your organization has been assigned the network number 220.25.25.0/16, the topology diagram is also given
below. Apply VLSM with a minimal wastage of IP addresses.
IP Address Given :________________________________________
Address class :________________________________________
Default subnet mask : ________________________________________
Topology Diagram :
Number of Subnets Needed : _______________________________________
Subnet Id (Subnet 1) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________

31. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 28
Subnet Id (Subnet 2) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________
Subnet Id (Subnet 4) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________

32. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 29
Problem 2:
Your organization has been assigned the network number 140.25.0.0/16, the topology diagram is also given
below. Apply VLSM with a minimal wastage of IP addresses.
IP Address Given :________________________________________
Address class :________________________________________
Default subnet mask : ________________________________________
Topology Diagram :
Number of Subnets Needed : _______________________________________
Subnet Id (Subnet 1) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________

33. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 30
Subnet Id (Subnet 2) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________
Subnet Id (Subnet 3) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________
Subnet Id (Subnet 4) : ________________________________________
Number of Host needed : ________________________________________
Number of Bits borrowed : ________________________________________
First Host ID : ________________________________________
Last Host ID : ________________________________________
Broadcast IP : ________________________________________
New Subnet Mask (CIDR) : ________________________________________

34. IPv4 Addressing and Subnetting – Workbook - © 2016 – Rajasekar – Rajasekar.sur@cas.edu.om Page 31
14) APPLY YOUR KNOWLEDGE
1) On the network 131.1.123.0/27, what is the last IP Address that can be assigned to a host?
a) 131.1.123.30
b) 131.1.123.31
c) 131.1.123.32
d) 131.1.123.33
2) For the network 192.0.2.0/23, which option is a valid IP address that can be assigned to a host?
a) 192.0.2.0
b) 192.0.2.255
c) 192.0.3.255
d) 192.0.4.0
3) Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two)
a) 113.10.4.0
b) 186.54.3.0
c) 175.33.3.255
d) 26.35.2.255
e) 17.35.36.0
4) Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to
network hosts? (Choose three)
a) 15.234.118.63
b) 92.11.178.93
c) 134.178.18.56
d) 192.168.16.87
e) 201.45.116.159
f) 217.63.12.192
5) Given the address 192.168.20.19/28, which of the following are valid host addresses on this subnet?
(Choose two)
a) 192.168.20.29
b) 192.168.20.16
c) 192.168.20.17
d) 192.168.20.31
e) 192.168.20.0
View publication statsView publication stats