1. Network Troubleshooting CT046-3.5-NWT NameTP No. Gan Pei ShanTP029115 Tan Ming FattTP036625 Elamparithi A/L ThuraisamyTP029002 Tan Ken SingTP028566

2. Troubleshooting Methodology  Troubleshooting methodology is the process that determines to solve and eliminate the problems on the network through the steps of the troubleshooting process Step 1: Define the problem Step 2: Gather information Step 3: Analyze the information Step 4: Eliminate possibilities Step 5: Propose hypothesis Step 6: Test hypothesis Step 7: Solve the problem  Troubleshooting approaches are provided some methods which are Top-down, Bottom-up, Divide and conquer, Follow-the-path, Spot the differences and Move the problem.

3. Troubleshooting Methodology  It will be using the troubleshooting approach which is bottom-up methodology that allows they can directly know and identify where the network problems at the physical component are.  The bottom-up will start with the physical components on the network and works its way up the layers of OSI model.  This approach is an effective and efficient for identifying the problem that given from the manufacturing company when the problem is suspected to be physical component on the network

4. Network Architecture Design  It suitable for using the network design for the manufacturing company which is tree topology.  Tree topology is combined the characteristics of Bus topology and Star topology.  For the Star topology, all devices are able to connect to a center hub which means that all PCs will be connected to its router.  multiple routers are connected directly to a center which is Shah Alam router.

5. Section A: Reserve Engineering & Troubleshooting  Kuantan  Problem 1  Solution 1

6. Section A: Reserve Engineering & Troubleshooting  Kuantan  Problem 2  Solution 2

7. Section A: Reserve Engineering & Troubleshooting  Kemaman  Problem 1  Solution 1

8. Section A: Reserve Engineering & Troubleshooting  Kemaman  Problem 2  Solution 2

9. Section B: Recommendation to Upgrade the Network  NAT  NAT is designed for IP address conversation that enables private IP networks to connect to the Internet.  NAT runs on a router and connect private network and public network together that allows single IP address communication.  NAT is able to connect multiple computers with private network to the public Internet by using single IP address  PAT  PAT is an extension for Network Address Translation (NAT) which allows multiple private IP address into single public IP address.  It is to share the single IP public address between multiple users who need to use the public Internet.  PAT is known as overload or port overload. PAT need to configure overload with NAT where can be assigned the available port to use it.

10. Section B: Recommendation to Upgrade the Network  Implementation NAT/PAT  NAT  the IP address “172.20.3.100” is the web server which is an internal address whereas the IP address “202.128.6.100” is the external address which allows others PC to access the public Internet.  The configuration “ip nat inside source static 172.20.3.100 202.128.6.100” is to perform translation for the inbound traffic.  interface Fast Ethernet port 0/0 is inside NAT interfaces which cannot be routed to the Internet because that is a private IP address.  The outside NAT interface is for the interface serial port 0/3/0 which means the interface can be connected to the Internet.

11. Section B: Recommendation to Upgrade the Network  Implementation NAT/PAT  PAT  The configuration is “ip nat inside source list 1 interface Serial0/3/0 overload” show that the NAT inside the access list 1 and the NAT outside the interface serial port 0/3/0.  The configuration “ip nat inside source list” is to translate the source of the IP packets that will be travelling outside to inside the interface serial port.  The configured ACL is to identify which permits the IP address to translate as well as which interfaces are configured NAT inside and NAT outside

12. Section B: Recommendation to Upgrade the Network  “show ip nat statistics” and “show ip nat translation” to check the IP NAT is working in the correct way on the Shah Alam router.

13. Section B: Recommendation to Upgrade the Network  the IP address “202.128.6.100” is the public address and the web server will successful to hide the private IP address.  the web server will be successful to hide the private IP address which is “172.20.3.254” so that Kuantan PC is not able to use this IP address to access the Internet.

14. Section B: Recommendation to Upgrade the Network  it is showing that the IP NAT traffic from Kuantan branch to Shah Alam headquarters.  That shows source IP address from Kuantan branch which is “202.128.6.120” and destination IP address to Shah Alam headquarter which is “202.128.6.100”  For example, Kuantan branch wants to access the Internet by using the public IP address from Shah Alam through web server is on a private network with private address which is “172.20.3.100”.