how to connect your computer to a wireless network

... the gate and continue into the designated public access area Instantly, your personal area network (PAN) device, which is clipped to your belt, beeps twice announcing that it automatically has ... into the public access area, your personal area network device contacted home via the Web pad on your refrigerator and posted a message to alert the family of your arrival .Your spouse will know ... Introduction to Wireless: From Past to Present • Chapter A wireless local area network transmits over the air by means of base stations, or access points, that transmit a radio frequency; the base stations...

Ngày tải lên: 14/08/2014, 18:22

... application.The wpa_supplicant is installed as a daemon that runs as a background process It has a command-line interface as well as a graphical user interface As of this writing, the latest stable release ... your local host Open a command prompt and change to the directory that contains the installation package Untar the package by issuing the command tar xvfz wpa_supplicant-0.4.9.tar.gz Change your ... encryption standard, whereas WPA uses the TKIP standard.This is not to say that WPA is not secure but to acknowledge that wireless security is ever changing WPA2 also supports a personal authentication...

Ngày tải lên: 14/08/2014, 18:22

... through intermediate CAs, according to a certification path The root CA can be a public or commercially available CA that issues an authorization to a subordinate CA, or it can be one deployed ... securing any AP/router and are not specific to a particular hardware: Assigning a unique SSID to your wireless network is the first security measure that you should take Any attacker with a “default” ... on your router, use a nondefault IP address range, not allow configuration changes to be made from a wireless client, and keep your firmware up -to- date Q: I have heard that WPA is vulnerable to...

Ngày tải lên: 14/08/2014, 18:22

... network scanners A wireless sniffer has the ability to detect wireless radio signals and access points within a reachable signal area that can then be compared against a list of known authorized access ... it into its wireless devices to offer some of the advantages of a WLAN such as scalability, security, and per-VLAN policy, thus making wireless networks more scalable and appealing to corporations ... covers broadcast domain segmentation and its advantages for overall performance on the LAN and WLAN networks A broadcast domain benefits from performance and also from certain security aspects You...

Ngày tải lên: 14/08/2014, 18:22

... so to speak, examining characteristics that are unique and beneficial to implementation—as well as those that make this medium cumbersome and awkward to manage Equally important is the ability to ... reboots Broadcast Domain Segmentation A broadcast domain segmentation prevents broadcast-directed traffic from one VLAN reaching other VLANs that are considered to be in a separate broadcast domain Unlike ... broadcast messages are flooded Figure 5.9 Broadcast Traffic Sends Broadcast Multicast Multicast traffic is similar to broadcast traffic Its intentional relationship is one-tomany Unlike broadcast...

Ngày tải lên: 14/08/2014, 18:22

... is not allowed access to the WLAN Authentication can also be made against a list of MACs allowed to use the network. This list of allowable MAC addresses may be on the AP or on a database somewhere ... Voice/DATA CDMA/WAP (IS-95b) GSM/GPRS 3G - Broadband Voice/DATA CDMA2000 EDGE UMTS 3G - Interoperable Broadband Voice/DATA Wireless Application Protocol The Wireless Application Protocol (WAP) has ... via fixed access back to the LE The RPs are mounted on antennas and arranged to create coverage areas or sectored cells.The radios located at the customer premise, or fixed access unit (FAU), connects...

Ngày tải lên: 14/08/2014, 18:22

... an attacker to perform a denial of service attack against your internal network, they would have needed to gain access to it, not always a trivial task Now, however, an attacker with a grudge against ... of wireless networking equipment has made this task slightly easier In this scenario, an attacker who has either taken a position at your company as a nightly custodian or has managed to “social ... performing a DoS attack A third way to conduct a DoS against a wireless LAN is similar to the scenario we’ve just discussed, but requires a wireless AP In this scenario, an attacker would configure a wireless...

Ngày tải lên: 14/08/2014, 18:22

... the store An escalator, which enables customers to move to the second story, divides the store horizontally and vertically An additional escalator on the reverse side enables customers to go to ... office for manual entry.This automation will also enable other employees to check stock accurately and quickly for items that just arrived Another advantage to adding this capability to the shipping/receiving ... 10.6, 10.7, and 10.8 represent the access point as a diamond, the radios as ovals, and a small antenna tower as an extended radio antenna.The RF patterns for the secondfloor overlap, as shown in Figure...

Ngày tải lên: 14/08/2014, 18:22

... with a short passphrase (less than 21 characters), WPA-PSK was vulnerable to a dictionary attack as well In November 2004, the first tool to automate the attack against WPA-PSK was released to the ... with WEP, WPA, and LEAP, and the fact that automated tools have been released to help accomplish attacks against these algorithms, penetration testers now have the ability to directly attack encrypted ... can be deployed with wireless networks, there are ways to attack many of them Vulnerabilities associated with WEP, WPA, and LEAP are well known Although there are tools to automate these attacks,...

Ngày tải lên: 14/08/2014, 18:22

... InfoDrive network Now we are ready to start our attack against the WLAN First, we fire up Aireplay and configure it to capture an ARP packet that we can inject into the network and generate the traffic ... point to capture ARP packets or EAPOL handshakes, it is often necessary to deauthenticate clients that are associated to the network Void11 is an excellent tool to accomplish this task To deauthenticate ... changing your MAC to appear to be allowed is simple with Change-Mac Right-click on the Auditor desktop and choose Auditor | Wireless- Change-Mac (MAC address changer).This opens a terminal window and...

Ngày tải lên: 14/08/2014, 18:22

... school play Meanwhile, when you first walked into the public access area, your personal area network device contacted home via the Web pad on your refrigerator and posted a message to alert the family ... the data An example of this is when an animal is tagged with a transmitter and the signal is collected and data is gathered over a period of time to be interpreted at a later date Monitoring applications ... multiple cash registers through an access point to a host computer that is connected to the WAN.This WAN link is used to send real-time data back to a corporate headquarters for accounting information...

Ngày tải lên: 16/10/2013, 13:15

... school play Meanwhile, when you first walked into the public access area, your personal area network device contacted home via the Web pad on your refrigerator and posted a message to alert the family ... clipped to your belt, beeps twice announcing that it automatically has retrieved your e-mail, voicemail, and videomail.You stop to view the videomail a finance meeting—and also excerpts from your ... how to harness their power and make them work together As smaller computers became more powerful, it became necessary to find a way to link them together to share memory, software, and information,...

Ngày tải lên: 14/08/2014, 14:20

... referred to as a beam Directional antennas fall into two general categories: parabolic and phased array Parabolic antennas function similar to a flashlight in that they use a dish-shaped reflector to ... construction of a Yagi antenna Figure 2.16 Yagi Phased Array Antenna and Associated Directional Beam Pattern Yagi Phased Array Antenna Cable Direction of Beam Reflector Element Driven Element Director Elements ... receiving antenna.This voltage signal is carried away from the antenna by a cable Now let’s consider a piece of metal that does not have a conductive path to ground and is acting as an antenna.The magnetic...

Ngày tải lên: 14/08/2014, 14:20

... array antennas are a type of phased array antenna designed to split up a circular coverage area into sectors to help in channel allocation and reuse Most sectorized antennas will have a beam width ... than directional antennas because they distribute their power over a wider area Parabolic antennas usually have the highest gain of any type of antenna A half-wave dipole antenna will have a gain ... Parabolic Antennas The most common examples of parabolic antennas are satellite dishes Parabolic antennas have an emitter that is mounted so that it is aimed into a bowl-shaped reflector Just as...

Ngày tải lên: 14/08/2014, 14:20

... with static addressing DHCP maintains a database of all addresses and to what device they are assigned, as well as which addresses are available Let’s talk about the process of address assignment.When ... organization responsible for maintaining IP addresses, you can get the details necessary to obtain a range In North America, South America, the Caribbean, and sub-Saharan Africa, the organization ... dynamically allocates IP addresses to computers to simplify administration functions Another application is NAT NAT and its variations are helping solve the shortage of IP addresses NAT allows a...

Ngày tải lên: 14/08/2014, 14:20

... access to the WLAN Authentication can also be made against a list of MACs allowed to use the network. This list of allowable MAC addresses may be on the AP or on a database somewhere on the wired network ... can authenticate a wireless device against a list of MAC addresses.This list could reside locally on the AP, or the authentication could be checked against a database of allowed MACs located ... received and will transmit it again All this takes place at the MAC layer Noticing that an ACK has not been received, the sending unit is able to grab the radio medium before any other unit can and...

Ngày tải lên: 14/08/2014, 14:20

... separate and distinct channels within that wireless topology Similarly, adjacent channel spacing and active channel separation play an important role when planning and deploying a wireless network. These ... characteristics that are unique and beneficial to implementation—as well as those that make this medium cumbersome and awkward to manage Equally important is the ability to leverage these attributes and apply ... will a support person work with an issue before escalating it? s How will an escalation take place? s Which procedures will be automated? s What tools are available to which organization? s What...

Ngày tải lên: 14/08/2014, 14:20

... Retail Case Study glass panes to let natural light filter into the store An escalator, which enables customers to move to the second story, divides the store horizontally and vertically An additional ... office for manual entry This automation will also enable other employees to check stock accurately and quickly for items that just arrived Another advantage to adding this capability to the shipping/receiving ... (RIP).They can also be configured to filter based on a MAC address when acting as a bridge Q: How will wireless laptops acquire an IP address and other IP-related information? A: When using wireless...

Ngày tải lên: 14/08/2014, 14:20

... academic areas of the campus At this time, only three academic areas are addressed.The planned network must be easy to adapt as these areas of study increase or change For example, the Math and Computer ... installed on every floor of each academic building.These LANs are totally exclusive to the teaching staff.The staff network is maintained as a separate network from the student network to help maintain ... such as encryption and password allocation to ensure the concept of fair play and remain within NCAA rules and guidelines Both teams must have equal capabilities to meet NCAA rules.Visiting coaching...

Ngày tải lên: 14/08/2014, 14:20

... supplies a dynamic (DHCP) address rather than a static IP address She therefore needs to instruct her firewall to Obtain an IP address automatically Jan also knows she wants to set up her firewall as a ... purchase a laptop PC and perhaps a second printer However, a quick call to her broadband provider has caused her to question the financial feasibility of running new wiring for broadband access ... Since the access point must be located near the Broadband connection, Jan decides to measure her house and create a diagram showing all the relevant distances She also decides to note any sources...

Ngày tải lên: 14/08/2014, 14:20