Tutorial 8

New Perspectives on the Internet, 8th EditionObjectivesExplore the history of wireless communicationLearn about Wi-Fi, MiFi, and wireless mesh networksInvestigate technologies used in personal area networksLearn about wireless wide area networks and WiMAXInvestigate wireless devices and wireless business plans that let you access the Internet

New Perspectives on the Internet, 8th Edition

New Perspectives on the Internet, 8th EditionObjectivesInvestigate security concerns of wireless networksEvaluate different wireless encryption methodsInvestigate security concerns of wireless devicesLearn how to protect the data stored on a wireless deviceLearn about the different types of attacks on wireless devicesLearn about the different types of attacks on Bluetooth devices


New Perspectives on the Internet, 8th EditionThe Evolution of Wireless NetworksA wireless connection occurs when data is transferred to another location without the use of any wiresIn 1994, carriers created digital networks, or Personal Communication Service (PCS), where data was carried in bits at a rate of up to 14.4 KbpsIn 1999, the first wireless connections were made to the InternetA personal digital assistant (PDA) is a handheld computer that can send and receive wireless telephone and fax calls, act as a personal organizer, perform calculations, store notes, and display Web pages


New Perspectives on the Internet, 8th EditionThe Evolution of Wireless Networks2G wireless or second-generation wireless allows data transferShort Message Service (SMS) is a widely-used service that lets users send text messages of up to 160 characters over a 2G wireless network to a wireless phone3G or third-generation wireless networks offer data transfer rates of up to 2 Mbps and constant connectionsThe availability of nationwide 3G service depends on the ability of the carriers to build the networks and establish partnerships with the manufacturers of the devices and hardware


New Perspectives on the Internet, 8th EditionThe Evolution of Wireless NetworksMany carriers have transformed and upgraded their existing networks by creating 2.5G wireless networks that deliver faster transfer speeds and allow you to send files and access the InternetA wireless device is usually manufactured to work on only a single type of network3.5G wireless networks or mobile broadband provide network connections of up to 10 Mbps3.5 G wireless networks already exist in a handful of countries


New Perspectives on the Internet, 8th EditionThe Evolution of Wireless Networks4G technology is expected to bring network connection speeds of up to 100 Mbps and deliver high-quality audio and video to wireless devicesCellular was the first industry to create wireless connections that served large geographical areas


New Perspectives on the Internet, 8th EditionWireless Local Area NetworkingA wireless local area network (WLAN) is a network in which devices use high-frequency radio waves instead of wires to communicate with a base station, which is connected to the InternetWi-Fi or wireless fidelity is the trademarked name of the Wi-Fi Alliance that specifies the interface between a wireless client and a base station, or between two wireless clients to create a hotspotA hotspot is an area of network coverage


New Perspectives on the Internet, 8th EditionWireless Local Area Networking


New Perspectives on the Internet, 8th EditionWireless Local Area NetworkingThe transfer rate of data is the speed at which data is transmitted from an access point to a wireless deviceAn access point is a hardware device with one or more antennae that permits communication between wired and wireless networks so wireless clients can send and receive dataThe range is the physical distance between the access point and the wireless deviceA device called a dual band access point makes it possible to connect devices configured with two different Wi-Fi standards to the same access point


New Perspectives on the Internet, 8th EditionWireless Local Area NetworkingA multiple band access point makes it possible to connect any wireless device to the same access pointMost new notebook computers and other wireless devices are manufactured with Wi-Fi compatible hardware installed in them and software that locates Wi-Fi signal and automatically initiates the connection to the wireless networkMiFi is a small wireless device a user keeps in a pocket or briefcase that provides a battery-operated, mobile, personal hotspot for connecting Wi-Fi devices to the Internet


New Perspectives on the Internet, 8th EditionWireless Mesh NetworksAnother type of wireless local area network is a wireless mesh network, which is commonly used to extend the reach of Wi-Fi hotspots to an enterprise


New Perspectives on the Internet, 8th EditionPersonal Area NetworkingPersonal area networking (PAN) refers to the wireless network that you use to connect personal devices to each otherThere are two major types of PANs:Using infrared technology you can wirelessly beam information from one device to another using infrared lightBluetooth provides short-range radio links between electronic devices


New Perspectives on the Internet, 8th EditionPersonal Area Networking


New Perspectives on the Internet, 8th EditionPersonal Area NetworkingA piconet can connect two to eight devices at a time


New Perspectives on the Internet, 8th EditionWireless Wide Area NetworkingWireless wide area networking (WWAN) makes it possible to access the Internet from anywhere within the boundaries of the WWANA WWAN is a wireless network that provides network coverage to a large geographical areaTo access the Internet using a WWAN, you need a WWAN PC card for the device you want to use and an account with the cellular carrier that owns the network


New Perspectives on the Internet, 8th EditionMetropolitan Area Networking: WiMAXWiMAX (Worldwide Interoperability for Microwave Access) uses the 802.16 standards defined by the IEEE for metropolitan area networksWiMAX is similar to Wi-Fi because it uses radio waves, but it transmits at a different radio spectrum and provides a much greater range to create a metropolitan area network


New Perspectives on the Internet, 8th EditionMetropolitan Area Networking: WiMAXA metropolitan area network (MAN) provides wireless broadband Internet access via radio signals in the 2 to 100 GHz and 10 to 66 radio spectrum, with a range of up to 31 miles and speeds of up to 70 Mbps


New Perspectives on the Internet, 8th EditionMetropolitan Area Networking: WiMAX


New Perspectives on the Internet, 8th EditionUsing Wireless Devices to Access the InternetThe best way to begin a search for wireless solutions is to begin with an exploration of the network youll useMost carriers offer specific products to work on their networks


New Perspectives on the Internet, 8th EditionSecurity Concerns for Wireless NetworksThreats common to all wireless networks:Attacks that prevent the use of a device or decrease the networks bandwidthIntercepting information sent over a wireless networkHacking into a wireless device to gain entry to its data or functionsStealing the identity of an access point to gain access to its connected users devicesViruses, spyware, and other security threats sent in the form of filesUsing information entered by the user into a wireless device to steal logins and other sensitive information


New Perspectives on the Internet, 8th EditionWireless Encryption MethodsWired Equivalent Privacy (WEP) is a security protocol for wireless LANs that works by encrypting data sent over the networkWhen WEP is enabled, it encrypts the data sent over the network with a key, or passphrase, that is entered by the user


New Perspectives on the Internet, 8th EditionWireless Encryption MethodsWi-Fi Protected Access (WPA) is a standard that was developed by the Wi-Fi Alliance in 2003 to address some of the inherent weaknesses in WEPWPA provides better encryption than WEP


New Perspectives on the Internet, 8th EditionMAC Address FilteringEach manufacturer of network interface cards adds a unique number, called a Media Access Control address (MAC address) to identify the deviceA wireless network can be protected by designating the devices allowed to connect to the network


New Perspectives on the Internet, 8th EditionDisabling the SSID BroadcastWhen a wireless router or access point sends out its signal, it also broadcasts its service set identifier (SSID) as a way of identifying the networks nameThe SSID makes it possible for roaming devices to discover the network and enables you to log in to the correct networkWardriving is a malicious activity that involves driving through a neighborhood with a wireless-enabled notebook computer with the goal of locating homes and businesses that have wireless networks in order to gain access to them


New Perspectives on the Internet, 8th EditionChanging the Default LoginOne of the most serious mistakes that home users make when installing a wireless network is the failure to change the default login for a deviceWhen you install a wireless network, make it a priority to change the default login and password


New Perspectives on the Internet, 8th EditionChanging the Default Login


New Perspectives on the Internet, 8th EditionSecurity Concerns for Wireless DevicesThe most basic security concern for the owner of a wireless device is theft or loss


New Perspectives on the Internet, 8th EditionProtecting the Data on a Wireless DeviceWireless devices are subject to over-the-shoulder attacks, in which an unauthorized person uses his or her physical proximity to your device to attempt to get your login information, passwords, or other sensitive data while youre workingWhen working in a business facility, opt for a wired Ethernet connection whenever possibleSetting a password on your device is another way to protect it


New Perspectives on the Internet, 8th EditionEvil Twin AttacksAn evil twin attack or caf latte attack is when a hacker gathers information about an access point and then uses that information to set up his own computer to use the real access points signal to impersonate the access pointWhen you use a free public hotspot, the data you send is not usually encrypted or secure and so it is subject to hackers using sniffer programs to illegally monitor activity on the wireless network in order to obtain personal information that you might transmit


New Perspectives on the Internet, 8th EditionSecurity Concerns for Bluetooth DevicesIn Bluejacking the bluejacker sends an anonymous message in the form of a phone contact displayed as a text message to a Bluetooth device to surprise the owner, express an opinion, or make a social connectionBluejacking, although alarming, is mostly harmlessTo protect a Bluetooth device from a bluejacking attack, you can disable the devices Bluetooth feature so that its signal is invisible or undiscoverableBluesnarfing occurs when a hacker with special software is able to detect the signal from a Bluetooth device and gain access to its data without the owners knowledge


New Perspectives on the Internet, 8th EditionSecurity Concerns for Bluetooth DevicesThe worst security threat to Bluetooth devices is bluebugging, which occurs when a hacker gains access to the device and its functions without the owners consentBluebugging allows the hacker to use the device to make phone calls, access data, and use the InternetMost manufactures have released patches to fix the security flaw that makes bluebugging possible


New Perspectives on the Internet, 8th EditionSummaryWireless communication is rapidly changingWiFi, MiFi, and wireless networksTechnologies used in personal area networksWireless wide area networks and WiMAXWireless devices and wireless business plans


New Perspectives on the Internet, 8th EditionSummarySecurity concerns of wireless networksDifferent wireless encryption methodsSecurity concerns of wireless devicesProtecting data stored on a wireless deviceTypes of attacks on wireless devicesTypes of attacks on Bluetooth devices


Tutorial 8

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