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Host1 and the 2600-1. Examine the IP configuration on Host1 by executing winipcfg. Make sure the IP addressing information is correct: IP address of 192.168.1.10, subnet mask of 255.255.255.0, and default gateway address of 192.168.1.1. Notice that the IP address is 192.168.100.10. Change this address to 192.168.1.10. Click the OK button to save your changes and close winipcfg. Try pinging the 2600-1 again: ping 192.168.1.1. The ping should succeed. On Host1, ping Host3: ping 192.168.3.10. Note that the ping still fails. 2. Test connectivity from Host3 to its default gateway. At the top of the simulator in the menu bar, click the eStations icon and choose Host3. Examine the IP configuration on Host3 by executing ipconfig /all. Make sure the IP addressing information is correct: IP address of 192.168.3.10, subnet mask of 255.255.255.0, and default gateway address of 192.168.3.1. Ping the default gateway address: ping 192.168.3.1. The ping should fail, indicating that there is a problem between Host3 and the 2600-2. In this example, assume layer 2 is functioning correctly; therefore, it must be a problem with the 2600-2. 3. Check the interface statuses and IP configuration on the 2600-2. At the top of the simulator in the menu bar, click the eRouters icon and choose 2600-2. Check the status of the interfaces: show interfaces. Notice that the fa0/0 has the wrong IP address (192.168.30.1) and is disabled. Go into fa0/0, fix the IP address, and enable it: configure terminal, interface fa0/0, ip address 192.168.3.1, no shutdown, and end. Verify the status of the fa0/0 interface: show interface fa0/0. Try pinging Host3: ping 192.168.3.10. The ping should succeed. 4. Verify connectivity from the 2600-2 to the 2600-1. Try pinging the 2600-1 s serial1/0 interface: ping 192.168.2.1. The ping succeeds. 5. Verify OSPF s configuration on the 2600-2. Examine the 2600-2 s OSPF configuration: show ip protocol. You should see OSPF as the routing protocol and networks 192.168.2.0 and 192.168.3.0 included (0.0.0.0 255.255.255.255). From this output, it looks like OSPF is configured correctly on the 2600-2.

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temperature. Notice that only about 70 percent of a battery s capacity is available at 32 degrees F, while about 110 percent of battery capacity is available at 110 degrees F. The obvious conclusion here is that EV converters in colder climates need to opt for the next larger model battery model in the line, while their Sun Belt counterparts can either enjoy their extra power, or downsize a notch if they live in the desert. Notice also that batteries don t freeze at 32 degrees F because of the concentration of sulfuric acid (H2SO4) in the electrolyte. This concentration increases (the specific gravity is higher) with increasing temperature and vice versa, so it s important to keep low-temperature operation batteries near fully charged at all times; letting the electrolyte freeze in a lead-acid battery can result in permanent battery cell damage.

The Constitution regulates government action; however, it generally provides no protection from actions taken by private individuals. As constitutional law scholar Laurence H. Tribe has explained, the Constitution, with the sole exception

cable the light pulse will suffer broadening or smearing. This limits the fiber s usable distance and bandwidth. Manufacturers use a graded cladding technique to optimize the fiber performance for specific application bandwidths per customer needs. Multimode fiber is specified by the diameters in microns of the fiber core and cladding. For example, 62.5/125 fiber cable has a core diameter of 62.5 microns and a cladding diameter of 125 microns. The light sources for multimode fiber are infrared LEDs (light-emitting diodes). Other losses in this type of fiber come from connectoring, splicing, and reflections. Imperfect connectoring and splicing are obvious losses. Reflections can be caused by impurities in the fiber and by damage from excessive bending or flexing of the cable. Losses can be detected by using a fiber optic power meter. Every fiber installation should be accompanied by a documented end-to-end loss measurement per fiber. This becomes a benchmark for that fiber and is used by the network designer to determine the acceptability of the fiber for a specific segment. Reflections, cable damage, and length are best measured with an OTDR (optical time domain reflectometer).

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800 600 400 200 0 200 400 600 800 1000 Fiber bandwidth (MHz/km)