CEH.V6.-.Module.20.Hacking.Wireless.Networks

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Unformatted text preview: y EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Effects of Wireless Attacks on Business Business As more and more firms adopt wireless networks, security becomes more crucial Business is at high risk from whackers (wireless hackers) who do not require physical entry into a business network to hack, but can easily compromise the network with the help of freely available tools Warchalking, Wardriving, and Warflying are some of the ways in which a whacker can assess the vulnerability of a firm’s network EC-Council Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Types of Wireless Network There are four basic types: Peer-to-Peer Wireless Network Access Point Wired Ethernet Network Wireless Network 1 Access Point 1 Extension Point Wired Ethernet Network Access Point 2 Wireless Network Wireless Network 2 Extension to a wired network Access Point 1 Wired Ethernet Network 1 Multiple access points Access Point 2 LAN-to-LAN wireless network EC-Council Wired Ethernet Network 2 Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Advantages and Disadvantages of a Wireless Network Wireless Advantages: • • • • • Mobility (easy) Cost-effective in the initial phase Easy connection Different ways to transmit data Easy sharing Disadvantages: • • • • • Mobility (insecure) High cost post-implementation No physical protection of networks Hacking has become more convenient Risk of data sharing is high EC-Council Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Wireless Standards i EC-Council Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Wireless Standards The first wireless standard was 802.11 It defines three physical layers: • Frequency Hopping Spread Spectrum (FHSS) • Direct Sequence Spread Spectrum (DSSS) • Infrared 802.11a: More channels, high speed, and less interference 802.11b: Protocol of Wi-Fi revolution, de facto standard 802.11g: Similar to 802.11b, only faster 802.11i: Improves WLAN securit WLAN ity 802.16: Long distance wireless infrastructure Bluetooth: Cable replacement option 900 MHz: Low speed, coverage, and backward compatibility EC-Council Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Wireless Standard: 802.11a 802.11a works at 40mhz in the 5g hz range It’s theoretical transfer rate is of up to 54 mpbs It’s actual transfer rates is of about 26.4 mbps It is limited in use because it is almost a line of sight li li transmittal that necessitates multiple WAPs (wireless access points) It cannot operate in same range as 802.11b/g It is absorbed more easily than other wireless implementations EC-Council Copyright © by EC-Council All Rights Reserved. Reproduction is Strictly Prohibited Wireless Standard: 802.11b – “WiFi” WiFi operates at 20 MHz in the 2.4 GHz range It is the most widely used and accepted form of wireless networking It has theoretical spe...
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