color the problems in each slide
Good Network
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.102
255.255.255.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
Duplicate IP Address
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
IP Address Outside Subnet
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.2.102
255.255.255.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
Wrong Subnet Mask
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.102
255.255.0.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
Wrong Default Gateway
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.102
255.255.255.0
192.168.1.101
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
Find the Problem #1
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.2.101
255.255.255.0
192.168.2.1
192.168.2.102
255.255.255.0
192.168.2.1
192.169.2.103
255.255.255.0
192.168.2.1
192.168.2.1
255.255.255.0
147.144.51.1
Find the Problem #2
192.168.1.101
255.255.255.255
192.168.1.1
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.102
255.255.255.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.1
255.255.255.0
147.144.51.1
Find the Problem #3
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.2.101
255.255.255.0
192.168.2.1
192.168.2.102
255.255.255.0
192.168.2.1
192.168.2.102
255.255.255.0
192.168.2.1
192.168.2.1
255.255.255.0
147.144.51.1
Find the Problem #4
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.0.101
255.255.255.0
192.168.2.1
192.168.0.102
255.255.255.0
192.168.0.1
192.168.0.103
255.255.255.0
192.168.0.1
192.168.0.1
255.255.255.0
147.144.51.1
Find the Problem #5
IP Address
Subnet Mask
Default Gateway
Hub
To the Internet
192.168.1.101
255.255.255.0
192.168.1.1
192.168.1.102
255.255.255.0
192.168.1.1
192.168.1.103
255.255.255.0
192.168.1.1
192.168.1.4
255.255.255.0
147.144.51.1
Answers
- #1: IP address out of subnet on rightmost machine
- #2: Bad subnet mask on leftmost machine
- #3: Duplicate IP address on rightmost machine
- #4: Bad default gateway on leftmost machine
- #5: All the default gateways are wrong (or the top machine’s IP address is wrong)