Computer Science and IT: Problem Solving Example

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768 words
Boston College
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Problem solving
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The green indication clearly shows successful connections in the network as well.

The overall network is divided into 3 networks. That is Network A, B and C. The first step was to identify the individual PCs. The two routers and the server to be used in the simulation. The next step was to arrange items in a logical design. The next step was to identify how many private networks were present and give them appropriate IP addresses.

They are: ()




These were divided into 3 sections where the first network starting from PC 7 to the Fast ethernet port 0/1 of Router A. The second network starts from the serial port s0/0/0, which has a clock speed of 64000, of Router A to the serial port of Router B. The third network starts from the fast ethernet port of Router B heading to the switch and all other devices connected i.e. the server and client machines.

There is IP forwarding conducted on Router A and Router B so as to allow traffic to pass to and from the various network zones with different network bands. (Evident in the Router A and Router B code)

All the devices in the individual network groups are assigned IP addresses appropriate with the specific group in which they are in. For instance, the server has IP address and its in the group of

The DNS is implemented in the server by having the URL of the website hosted in the server with IP address This can be reached when you browse (screenshot of the server DNS)

The DHCP is attained by giving the server capabilities of assigning IP addresses automatically. This is evident when a client PC attains an IP address automatically and its only leased to that client machine for a specific period of time. (screenshot for DHCP)

Lastly there is Firewall configuration for restrictive access (evident in the notepad code Router B)

The network satisfies the design and test criteria that was set.

Below are the different screenshots of the Networking Project and a different Zip file is provided which contains the network simulation. Kindly see the screenshots of both task one and task two below.

(Simulation software used: Cisco Packet Tracer, OS-windows 64.bit and project attached as a zip file to run on the simulator)

Task I:

1. Configure the PC, Server and Router interfaces with appropriate network addressing;

2. Configure routing (IP packet forwarding) on the routers;

3. On the client ping the client's own network interface, then the local router gateway interface, then the remote router interface, then the server;

4. Use the traceroute command from the client to the server. Include results of the traceroute in your submission.

The screenshots below give the results from the simulator:


The whole network is divided into 3 private Networks;

Network A has group address

Network B has group address

Network C has group address

This is a ping from the client machine from PC 7 to Router A to Router B to PC 8/ Server machine across the three networks stated above.

The ping is successful and it portrays IP packet forwarding across networks.

This is a tracert command performed from the client machine to the server machine hosting the DNS. The command is successful.

Router A Explained:

The comments within the screenshots explain into detail the different operations within the router. They are set as comment in the screenshot

Router B Explained:

Task II

1. DHCP: Configure DHCP on the server and show that the client PC has successfully received an IP Address and other network parameters (default router, netmask, DNS) using DHCP;

2. WEB Server: Configure a WEB server on dedicated machine, with URL as www.YOUR

3. DNS: Configure a DNS Server on the server device and demonstrate that forward and reverse DNS are working from the client PC; test DNS Server by browsing www.YOUR from client PC, DNS must resolve this URL to IP address of WEB Server

4. Firewall: Configure traffic filtering on the router to block TCP traffic only between one of the client PC and WEB Servers, and provide evidence of such traffic filtering.

This screenshots shows the DHCP configuration made on the server. In turn, the DHCP IP address is allocated to the PC machines. This enables the machines receive the IP addresses dynamically.

On the server machine, there is DNS allocation for a website

There is Firewall configuration present in the code.

This shows that DHCP address from the server is on and working providing the client machine with IP addresses automatically


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