CSC 270-D44 Networking Basics Homework #2 Fall 2017 Dr. Wu Name: _______________
ID: 3595139 • Letter: C
Question
CSC 270-D44 Networking Basics
Homework #2
Fall 2017
Dr. Wu
Name: _________________
IPv4 Subnetting
For the following exercises, come up with the subnet address, broadcast address, the number of possible hosts, and the first and last valid host address of that subnet.
Example 1:
172.16.37.186/26
Subnet Mask
255.255.255.192
Subnet Address
172.16.37.128
Broadcast Address
172.16.37.191
Number of Hosts
62
First Host Address
172.16.37.129
Last Host Address
172.16.37.190
Questions:
Q1:
192.168.92.157/29
Subnet Mask
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
Q2:
162.29.10.56/21
Subnet Mask
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
Q3:
10.130.109.105/14
Subnet Mask
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
Example 2:
172.16.37.186
Subnet Mask
255.255.255.192
Prefix Length
/26
Subnet Address
172.16.37.128
Broadcast Address
172.16.37.191
Number of Hosts
62
First Host Address
172.16.37.129
Last Host Address
172.16.37.190
Q4:
172.54.50.112
Subnet Mask
255.255.224.0
Prefix Length
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
Q5:
205.17.60.158
Subnet Mask
255.255.255.128
Prefix Length
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
Q6:
10.10.171.80
Subnet Mask
255.240.0.0
Prefix Length
Subnet Address
Broadcast Address
Number of Hosts
First Host Address
Last Host Address
172.16.37.186/26
Subnet Mask
255.255.255.192
Subnet Address
172.16.37.128
Broadcast Address
172.16.37.191
Number of Hosts
62
First Host Address
172.16.37.129
Last Host Address
172.16.37.190
Explanation / Answer
Questions:
Q1:
192.168.92.157/29
Subnet Mask
255.255.255.248
Subnet Address
192.168.92.152
Broadcast Address
192.168.92.159
Number of Hosts
6
First Host Address
192.168.92.153
Last Host Address
192.168.92.158
Q2:
162.29.10.56/21
Subnet Mask
255.255.248.0
Subnet Address
162.29.8.0
Broadcast Address
162.29.15.255
Number of Hosts
254
First Host Address
162.29.8.1
Last Host Address
162.29.15.254
Q3:
10.130.109.105/14
Subnet Mask
252.252.0.0
Subnet Address
10.128.0.0
Broadcast Address
10.131.255.255
Number of Hosts
First Host Address
10.128.0.1
Last Host Address
10.131.255.254
Example 2:
172.16.37.186
Subnet Mask
255.255.255.192
Prefix Length
/26
Subnet Address
172.16.37.128
Broadcast Address
172.16.37.191
Number of Hosts
62
First Host Address
172.16.37.129
Last Host Address
172.16.37.190
Q4:
172.54.50.112
Subnet Mask
255.255.224.0
Prefix Length
/19
Subnet Address
172.54.32.0
Broadcast Address
172.54.63.255
Number of Hosts
8190
First Host Address
172.54.32.1
Last Host Address
172.54.63.254
Q5:
205.17.60.158
Subnet Mask
255.255.255.128
Prefix Length
/25
Subnet Address
205.17.60.128
Broadcast Address
205.17.60.255
Number of Hosts
26
First Host Address
205.17.60.129
Last Host Address
205.17.60.254
Q6:
10.10.171.80
Subnet Mask
255.240.0.0
Prefix Length
/12
Subnet Address
10.0.0.0
Broadcast Address
10.15.255.255
Number of Hosts
First Host Address
10.0.0.1
Last Host Address
10.15.255.254
192.168.92.157/29
Subnet Mask
255.255.255.248
Subnet Address
192.168.92.152
Broadcast Address
192.168.92.159
Number of Hosts
6
First Host Address
192.168.92.153
Last Host Address
192.168.92.158