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The 70-620 examination probably will not ask you how to set up a VPN server. It could, however, test your knowledge of how to connect through a VPN connection.
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If you have a wireless network, you can run the Set Up A Wireless Router Or Access Point Wizard on one computer that is already on your network and save network settings to a USB flash drive. This is the same wizard that you would use to configure a computer with a Wi-Fi adapter
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Lesson 1: Using the Network And Sharing Center to Configure Networking
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to provide wireless access for a network. The steps you follow are almost identical except that in one case you are configuring settings to create a file on a USB drive that enables other computers to connect to a configured wireless network. In the other case you are configuring the actual wireless settings. You can add a wireless-enabled computer to your network by plugging the USB flash drive into that computer and clicking Wireless Network Setup Wizard in the AutoPlay dialog box. You save wireless settings to a USB drive and add a wireless-enabled computer to your network in the practice session later in this lesson. If you are setting up a WAP on a computer with a WiFi interface that is running Windows Vista, you follow much the same procedure except you do not specify saving the settings to a USB flash drive. (You also need to configure ICS on that computer.) However, you can save settings to a flash drive if your Windows Vista computer is Wi-Fi enabled and provides wireless access itself or if it is not Wi-Fi enabled but is connected to a third-party WAP. Saving settings to a USB flash drive is therefore the more universal procedure, which is why it has been chosen for the practice session. Alternatively, you can manually add a wireless computer running Windows Vista to your network by clicking Connect To on the Start menu, choosing the wireless network from the list that appears, and then clicking Connect. You then type the network security key or passphrase (if prompted) and click OK.
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By default, a WAP is set to permit open access by any wireless-enabled computer within its range. You can set up your WAP to require a security key and ensure that any user who wants to add a computer to the network needs to provide a passphrase. Refer to the manufacturer s instructions for details. For more information about wireless network security, search for Set up security for your wireless network in Windows Help and Support.
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You are adding a new computer to a wired network that connects to the Internet through a cable modem attached to one of your computers by a USB cable. The new computer is configured to obtain its IP configuration automatically. When you turn the new computer on, it is configured with an IP address, a subnet mask, and IP addresses for its default gateway and DNS server. Where does it get this information
Quick Check Answer From the computer attached to the modem, which is configured to run ICS To add a wireless device other than a computer to a network, you need to follow the manufacturer s instructions that came with the device. You might be able to add the device using a USB flash drive. If the device is a printer, you might need to enable printer sharing so that other
7
Configuring Network Connectivity
computers on the network can use it. If you want to add a Bluetooth enabled device to your network, you need a Bluetooth network adapter.
MORE INFO
Bluetooth
For more information about Bluetooth, search for Bluetooth in Windows Help and Support.
Wireless Networks
In a wireless network the computers are connected by radio signals instead of wires or cables. Advantages of wireless networks include mobility and easy physical installation (you do not need to run cables under the floor). Disadvantages include a slower connection (typically) than a wired network and interference from other wireless devices, such as cordless phones. Currently three types of wireless network technologies are in common use:
802.11b Up to 11 megabits per second (Mbps); good signal range; low cost. This technology allows fewer simultaneous users than the other two options and uses the 2.4 gigahertz (GHz) frequency. This frequency is prone to interference from microwave ovens, cordless phones, and other appliances. 802.11a Up to 54 Mbps; more simultaneous users than 802.11b but a smaller signal range; expensive. This option provides a fast transmission speed and uses the 5 GHz frequency, which limits interference from other devices. However, its signal is more easily obstructed by walls and other obstacles and it is not compatible with 802.11b network adapters, routers, and access points. 802.11g Up to 54 Mbps (under optimal conditions); more simultaneous users than 802.11b; very good signal range; not easily obstructed. This option is compatible with 802.11b network adapters, routers, and access points, but it uses the 2.4 GHz frequency and has the same interference problems as 802.11b. It is also more expensive than 802.11b.
802.11b is adequate for most home and many small office applications. If, however, your network carries a high volume of streaming media (video or music) traffic or if interference is a major problem, you might consider 802.11a. If you already have 802.11b devices on your network but require high-speed transmission between specified network points, you might consider 802.11g. Most modern WAPs on sale from computer equipment retailers are now 802.11g. If you have more than one wireless network adapter in your computer or if your adapter uses more than one standard, you can specify which adapter or standard to use for each network connection.
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