Lab 4: Exploring TCP/IP Networks (Part 1)
by: James Moore
Objectives: Configure a simple class “B” network
Equipment List: 2 x Mac Laptops, 1x PC, 1 Switch, 1 router.
Notes and Observations: Setup a stand-alone class “B” network with the first 16 bits the same and the last 16 bits unique. We set up our 3 computers and decided on our three unique IP addresses. We then plugged up to the same switch and decided on the subnet mask to be used for this network. We pinged each other on the network to ensure that each of our computers could communicate with each other.
Diagrams, Flowcharts, and Figures: None (THROUGHOUT LAB)
References: Lab handout (SAME USED THROUGHOUT LAB)
Questions: What is the highest OSI layer the computers are currently communicating with? Layer 2. What protocol is used to automatically (dynamically) assign IP addresses to machines? DHCP. How did we check connectivity? by pinging each other. Other ways to confirm that the network works between the computers? run a traceroute.
Objectives: Configure a router. Connect networks “B” and “C” to the router and communicate. Create two appropriate addresses for the router.
Notes and Observations: We were to use patch cords and plug up the switches to the router in which we did, but later ran into a problem. We came up with two gateway addresses that were similar each of our network IP addresses. We then used a terminal cable and plugged up to a computer and opened the hyperterminal to configure the router. We were manually configuring by adding the IP addresses and subnet and then enabling the routing protocol. After configuring we still were not able to communicate with the other network. Our problem ended up being a Layer 1 problem with a bad wire. We didn’t ensure the light was green on the switch to the port the router was plugged up to. After fixing the problem we were able to ping other computers on the other network.
Conclusion: This lab provided a great opportunity to set up a network as teams and configure a router and enjoyed the accomplishment of all our computer communicating with each other. A big lesson learned is to start with the basics first when things go wrong. With all my years of signal experience I should of known to start with the wire or at least check the light to ensure it was on, but still was a good reminder and learning experience to deal with that frustrating situation. I also learned a great bit about using the hyperterminal to configure a router and what it takes to add networks to it.