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TitlePractical Subnetting Solutions
TagsIp Address Communications Protocols Internet Standards Data Transmission
File Size134.9 KB
Total Pages26
Document Text Contents
Page 1

58

Practical Subnetting 1

F0/1
F0/0

S0/0/0 S0/0/1Router A
Router B

Based on the information in the graphic shown, design a network addressing scheme that will
supply the minimum number of subnets, and allow enough extra subnets and hosts for
100% growth in both areas. Circle each subnet on the graphic and answer the questions
below.

Marketing
24 Hosts

Management
15 Hosts

F0/0

Reasearch
60 Hosts

Address class

Custom subnet mask

Minimum number of subnets needed

Extra subnets required for 100% growth

Total number of subnets needed

Number of host addresses
in the largest subnet group

Number of addresses needed for
100% growth in the largest subnet

Total number of address
needed for the largest subnet

IP address range for Research

IP address range for Marketing

IP address range for Management

IP address range for Router A
to Router B serial connection

IP Address 172.16.0.0

_____________________________

_____________________________

_________

_________

_________

_________

_________

_________

_____________________________

_____________________________

_____________________________

_____________________________

(Round up to the next whole number)

(Round up to the next whole number)

Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

B
255.255.224.0

4
4

8

60

60

120

+

+

=

=

172.16.0.0 to 172.31.255
172.16.32.0 to 172.63.255
172.16.64.0 to 172.95.255

172.16.96.0 to 172.127.255

Page 2

59

Show your work for Practical Subnetting 1 in the space below.

17
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8

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Page 13

70

Practical Subnetting 7
Based on the information in the graphic shown, design a network addressing scheme that will
supply the minimum number of hosts per subnet, and allow enough extra subnets and
hosts for 125% growth in all areas. Circle each subnet on the graphic and answer the
questions below.

Address class

Custom subnet mask

Minimum number of subnets needed

Extra subnets required for 125% growth

Total number of subnets needed

Number of host addresses
in the largest subnet group

Number of addresses needed for
125% growth in the largest subnet

Total number of address
needed for the largest subnet

IP address range for Router A Port F0/0

IP address range for Research

IP address range for Deployment

IP address range for Router A
to Router B serial connection

_____________________________

_____________________________

_________

_________

_________

_________

_________

_________

_____________________________

_____________________________

_____________________________

_____________________________

(Round up to the next whole number)

(Round up to the next whole number)

Start with the first subnet and arrange your sub-networks from the largest group to the smallest.

+

+

=

=

Marketing
75 Hosts

IP Address 177.135.0.0

Administration
33 Hosts Sales

255 Hosts

Research
135 Hosts

F0/0
S0/0/0 F0/0

F0/1

S0/0/0
Router A

Router B

Deployment
63 Hosts

4
5

9

363

454

817

B
255.255.252.0

177.135.0.0 to 177.135.3.255
177.135.4.0 to 177.135.7.255
177.135.8.0 to 177.135.11.255

177.135.12.0 to 177.135.15.255

Page 14

71

Show your work for Problem 7 in the space below.

17
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8

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2,048

4,096

8,192

16,38
4

32,76
8

65,5
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0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

1 1 0 0 1 1 0 0 1 1 0 0 1 1

1 1 1 1 0 0 0 0 1 1 1 1

1 1 1 1 1 1 1 1

. . . . . . . . .

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(0
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Page 25

82

# of Bits
Borrowed

0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

Subnet
Mask

255.0.0.0
255.128.0.0
255.192.0.0
255.224.0.0
255.240.0.0
255.248.0.0
255.252.0.0
255.254.0.0
255.255.0.0

255.255.128.0
255.255.192.0
255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0
255.255.254.0
255.255.255.0

255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252

Total # of
Subnets

1
2
4
8
16
32
64
128
256
512

1,024
2,048
4,096
8,192
16,384
32,768
65,536
131,072
262,144
524,288

1,048,576
2,097,152
4,194,304

Total # of
Hosts

16,777,216
8,388,608
4,194,304
2,097,152
1,048,576
524,288
262,144
131,072
65,536
32,768
16,384
8,192
4,096
2,048
1,024
512
256
128
64
32
16
8
4

Usable # of
Hosts

16,777,214
8,388,606
4,194,302
2,097,150
1,048,574
524,286
262,142
131,070
65,534
32,766
16,382
8,190
4,094
2,046
1,022
510
254
126
62
30
14
6
2

# of Bits
Borrowed

0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

Subnet
Mask

255.255.0.0
255.255.128.0
255.255.192.0
255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0
255.255.254.0
255.255.255.0

255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252

Total # of
Subnets

1
2
4
8
16
32
64
128
256
512

1,024
2,048
4,096
8,192
16,384

Total # of
Hosts
65,536
32,768
16,384
8,192
4,096
2,048
1,024
512
256
128
64
32
16
8
4

Usable # of
Hosts
65,534
32,766
16,382
8,190
4,094
2,046
1,022
510
254
126
62
30
14
6
2

Class C Addressing Guide
# of Bits

Borrowed
0
1
2
3
4
5
6

Subnet
Mask

255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252

Total # of
Subnets

1
2
4
8
16
32
64

Total # of
Hosts

256
128
64
32
16
8
4

Usable # of
Hosts

254
126
62
30
14
6
2

CIDR
/8
/9
/10
/11
/12
/13
/14
/15
/16
/17
/18
/19
/20
/21
/22
/23
/24
/25
/26
/27
/28
/29
/30

CIDR
/16
/17
/18
/19
/20
/21
/22
/23
/24
/25
/26
/27
/28
/29
/30

CIDR
/24
/25
/26
/27
/28
/29
/30

Class B Addressing Guide

Class A Addressing Guide

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Page 26

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