a Small Network Project 10-4: Troubleshoot Subnetting You can use Recall that a
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a Small Network Project 10-4: Troubleshoot Subnetting You can use Recall that a subnet or broadcast domain is bound by route osts on a small network to demonstrate some of the problems that might need a leas S ON PROJECTS arise when subnetting errors are made. To do this project, you ffice) route two computers connected via a consumer-grade, soHo (small off using a Class C private address instructions are written fo Windows 8.1 machines, but can be adapted for other operating systems. Complete the following steps to demonstrate the errors that occur when subnetting: 1. computer open the Command Prompt window and use ipconfig com mand to determine the computer's IP address, subnet mask, and default gatewa Write down this information. Confirm Internet connectivity by pinging of Google DNS servers using the command ping 8.8.8.8 2. computer open the Command Prompt window and use the ipconfig command to determine the computer's IP address, subnet mask, and default gateway Write down this information. Confirm Internet connectivity with the command ping 8.8.8.8. Also ping computer A at its IP address to confirm that the two computers can talk to each other 3. On computer A, right-click Start, click Network Connections, right-click the active net work connection, and then click Properties. 4. Under This connection uses the following items, double-click Internet Protocol Version 4 TCP/IPv4), select Use the following IP address, and then fill in the following information a. IP address: 10.0.2.3 b. Subnet mask: 255.255.255.0 5. Click OK, return to the Command Prompt window and then repeat the ipconfig command to confirm the IP address and subnet mask changes. Ping computer B to determine if the two computers can communicate, then ping Google's DNS server toExplanation / Answer
Point 1:
Computer A:
IP address: 192.168.0.102
Subnet mask: 255.255.255.0
Default Gateway: 192.168.0.1
ping 8.8.8.8: Request received. Internet Connectivity confirmed.
Point 2:
IP address: 192.168.0.104
Subnet mask: 255.255.255.0
Default Gateway: 192.168.0.1
ping 8.8.8.8: Request received. Internet Connectivity confirmed.
Point 3 and 4 executed.
Point 5:
IP address and subnet mask changed.
New IP address: 10.0.2.3
New Subnet mask: 255.255.255.0
New Default Gateway:
Ping Computer B:
ping 192.168.0.104:
PING: transmit failed. General failure.
Ping Google DNS server:
ping 8.8.8.8:
PING: transmit failed. General failure.
No internet connectivity.
Reason: The ping attempt was not successful in either attempt because we changed the IP address of this computer to a different network where computer B does not belong. This is the reason this computer cannot find computer B.
And for internet connectivity, we need default gateway which acts as an interface to the internet. This gateway is used to connect a device to the internet and communicate with it. We have not mentioned the default gateway while changing the IP address.
Point 6:
With IP address 10.0.2.3 the default gateway should be 10.0.2.1 which I entered.
Point 7:
Pinging 8.8.8.8:
Reply from 10.0.2.3: Destination host unreachable.
ping command was not successful and no internet connectivity confirmed because the computer is connected to a router interface whose IP address is 192.168.0.1. Now to access the internet the computer must connect to the router on this interface. And to connect to the router's interface, we must enter the router's interface IP address as the computer's default gateway. But the default gateway is set to 10.0.2.1 which the computer cannot found.
Point 8 and Point 9 executed.
Point 10:
Ping Google DNS server:
ping 8.8.8.8:
PING: transmit failed. General failure.
Reason: For internet connectivity, we need default gateway which acts as an interface to the internet. This gateway is used to connect a device to the internet and communicate with it. We have not mentioned the default gateway while changing the IP address.
Point 11:
No, the ping command was not successful because the two computers are linked to a router. If they want to communicate they must do it through the router. And as we have changed IP addressess and gateways thus, these computers now cannot connect to the router which resulted in loss of connectivity.
Point 12:
The network ID of this subnet is the result of ANDing the IP address with the subnet mask. Here, IP address is 10.0.2.5 and subnet mask is 255.255.255.0.
Therefore, the result is, Network ID: 10.0.2.0
The CIDR notation is the notation where the network address is followed by the decimal representation of total subnet mask bits that are set to 1. In this case, Network ID is 10.0.2.0 and total 24 bits are 1 in the subnet mask. Therefore, the CIDR notation of this subnet is 10.0.2.0/24
The broadcast address is the last address of a subnet. For this subnet, the broadcast address is 10.0.2.255.
Point 13:
Internet connectivity confirmed.
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