johnxuster asked:




Nikon’s Wi-Fi cameras are here, though perhaps a few moments too soon. The promise is great: it’s a camera that’s wirelessly connected to your computer, even when the computer is in the other room. The execution—in the shape of the Nikon CoolPix P2 I tested—still needs tweaking.

There are some cool things you can do with a Wi-Fi camera. The biggest oohs and aahs come from shooting pictures that are immediately transferred to a slideshow playing on a computer, with music and all. More mundane but equally useful are a variety of wireless picture transferring and printing options—just select a shot you like and send it to the computer or printer without ever taking your hands off your camera. You can send shots to any printer connected to a computer, but with the optional PD-10 Wireless Print Adapter ($50; out in mid-October), you can also wirelessly send shots straight to any PictBridge-enabled printer.

The trouble with the CoolPix P2 is that it lacks the range and battery life to effectively carry out its missions. Over the Labor Day weekend, I walked around the inside and outside of the house with the camera, for the most part getting a reasonable connection to our Wi-Fi network (a router located in my home office). But when I took the P2 and laptop out to the deck to create a live slideshow there, the camera had an awful time. OK, so Wi-Fi can be tricky, but at the same deck table both an Apple PowerBook and an HP Pavilion notebook had no problems connecting to the Internet via the same wireless network.

Every time the camera would lose the connection, it forgot what I was doing. I would have to wade through a bunch of menus just to get back into the photo shoot-and-transfer mode I’d been using. And after some time playing with the camera in Wi-Fi mode, certainly less than an hour, I was alerted that the battery was drained. Maybe I shouldn?t be too bothered ? after all, I was heavily testing the camera?s wireless features, which isn?t necessarily typical use. Still, it would be nice to know I could get through an entire birthday party while shooting in Wi-Fi mode.

I hate to condemn a first-of-its-kind technology because of herky-jerky behavior. Every product goes through a streamlining, an evolution. Nowadays, the product itself can be updated as improvements are made, and I suspect Nikon is hard at work trying to right some of the wrongs of its new release. The camera is surprisingly affordable for carrying this new capability; after all, in addition to being a wireless pioneer, it?s a solidly performing 5.1-megapixel camera with 3.5x optical zoom and a lot of great automatic and manual controls. (There?s also an 8-megapixel version, the CoolPix P1.) Am I saying go out and buy one? No, but stay tuned, because when the time is right, I think Wi-Fi cameras will be quite desirable.

Gary Zivkovich asked:


Like WiFi system, WiMax can work on the similar way. You can access WiMax internet connection at any distance.

The speed of the WiMax is higher and there are more and more customers are enjoying using the WiMax system because of netter connectivity.

With the better connectivity, the WiMax can provide better connectivity in the interior region in USA because of lack of phone and cable network.

1. The WiMax system provides facilities of internet access through WiMax tower and WiMax receiver. The WiMax Tower is able to cover the larger area in the range of 8 thousand square kilometer. It is like cell phone tower.

2. WiMax receiver and antenna work with same direction as WiFi network. It has inbuilt facilities to access the network. The PCMCIA card is build-in with laptop to receive and deliver the signals.

3. TheWiMax tower station provides high bandwidth facilities like the T3 lines. You can also connect it with wired connection. You can also connect to WiMax tower with microwave link. Connection with one tower to another is the major advantage to get the benefits to connect in the rural area.

4. WiMax provides connection in two kinds of wireless service. There are lines of sight and non-line of sight is available in the WiMax services. In the line-of sight services there is a fixed antenna used at home top or office top to connect the network. The line-of-sight is more static and connectivity is good. You can get the faster speed with less error.

5. With non-line-of-sight network work on the same line with WiFi network. In this case you need small antenna in the computer to get the connection remotely. WiMax provides the services in the range of 2 to 11 GHz.

Munish Bhardwaj asked:


Computers  are connected through wired or wireless media. In wired media STP or UTP cables and devices like hub, switches, routers etc. are used. Now a days people are opting for wireless networking more than wired networking. In wireless networking  radio waves and microwaves are used to attach computers. Wireless network also called Wi-Fi  network. The first wireless card was 802.11b but the standard are upgraded day by day.  In companies, universities,  libraries, hotels, airports wireless network are more in demand and more feasible than the wired network. Telecommunication network is a bigger network in wireless networking eg. Mobile Phones. There are  many wireless devices that are used like wireless Access Point, Wireless  LAN Cards, Wireless Adapters, Wireless Routers etc. There are many types of wireless networking like Wireless PAN,  Wireless LAN, Wireless MAN etc.

The  wireless network has many advantages as compare to wired networking, there is no need to put cables across the walls of homes and offices, it helps maintaining the beauty and cost/time incurred on drilling/repairing the walls is saved. We also save cost incurred on network cables, it is less time consuming and requires less technical support, easy to set up than wired media. It is accessible anywhere within its range, hence you need not to find a network I/O to get connected, take your laptop within the range of the wi-fi network and access the internet or other resources.

The only problem of a wi-fi network is its limited range and larger networks are affected by weather as well. If you want to setup wi-fi for a large area say college campus etc. you have to add in more access points.

If you are planning to setup a wi-fi network at your home or office, you must address the security issues as someone may intrude into your network and access your valuable information or may send emails using your IP. In the recent incidences, terrorists used the Wi-Fi network of neighbors to communicate with each other and sent threatening emails to people. Hence, ensure that your Wi-Fi is fully secured and nobody else is using it except you.

You can  protect your network with firewalls, proxy, VPN and WEP key etc. In WEP (Wired Equivalent Privacy) we give a security code  that secures our network and unauthorized person can not access the network. WEP comes with 64bit, 128bit , WPA-PSK, WPA–TKIP security features. For better security, keep changing your WEP key and administrator password, router password regularly, filter out the MAC address and use firewalls at every computer in a network and lock all the folders and make access lists.  Access list provided extra level security while giving instructions to routers and filter the MAC addresses. Switch off the routers and other devices when not in use. But the above securities measures can not be implemented in the public areas like libraries, hotels, airports etc.

Steve asked:


The world has advanced into a new age. This new age is characterized by tremendous achievements in the fields of communication technology. One facet of this new age is the advent of internet in our everyday lives. Be it offices, homes or even some social joints like coffee shops, restaurant or hotels. Internet has become omnipresent and its use is only going to increase in the times to come. Even the internet technology is seeing various changes in the present times. The latest being the development and easy accessibility of wi-fi hotspot gateway. Now this technology is easily available to the common man through the genuine efforts of some companies that are making the availability of internet to the common man all the more easy.

These companies are allowing various internet service providers different means through which these service providers can make the wireless hotspot gateway easily available to their customers. One method is the access through the landing page wherein the customers is taken to the landing page and is asked to verify whether they agree to the terms and conditions. These hotspot gateway service providers also make sure that the landing page has the branding of the service provider.

Another method that these companies are allowing the internet service provider is through the ticket code access in which software that can create and store thousands of five letter unique access codes is made available to the service provider. The service provider can then sell these codes as internet access tickets to the customer. These codes are generally used by the internet cafes.

Another way of making the wifi hotspot gateway available to the common man is through a single code that is used by many customers. This type of hotspot gateway service is generally preferred by the small businesses like coffee shops etc.

drogbagoogle asked:


The main difference between Wireless network card and Network card is signal to receive and send data, if you can find Internet access port, but also can be achieved with Internet connections. Today, the wireless card is more product categories, and prices vary. For ordinary consumers, the purchase of your home wireless mini pci-e card when the purchase is sure to encounter all kinds of errors.

1 transmission rate is not the only criterion to measure the performance

Transfer rate here refers to the wireless network card in some of the data under the standard network protocol to send and receive capabilities, the rate depends on the support of the standards and the surrounding environment and other factors, the general product tagging is theoretical transfer rate, the actual transfer rate significantly lower than the theoretical transfer rate.

To measure the overall performance of a bluetooth wifi mini pci-e card, looking at transfer rates of an indicator is not enough, also need to note that the product interface types, transmission range, price brand, security, compatibility and other features.

In addition, the performance of a wireless network card to play will depend on the entire wireless LAN circumstances of each case, such as the use of a wireless LAN TP-LINK TL-WN610G 108Mbps in Super G wireless card, while the wireless router using the transfer rate of 54Mbps products, so in theory case, the wireless card would be adaptive, “deceleration” up to 54Mbps transfer rate can be achieved, in fact lower. If the wireless mini pci card and wireless router, there is an obstacle between, the rate will be subject to greater impact.

2 USB and PCMCIA aegis

By interface points can be wireless card into PCI, USB, PCMCIA three types, different interfaces can be installed on different computers. When purchasing wireless network card to a computer interface according to their own choice.

USB wireless cards are generally divided into two kinds of USB 1.1 and USB 2.0, IEEE 802.11b standard in the early products to use more USB 1.1 interface, then the IEEE 802.11g standard products more use of the USB 2.0 interface, such as TP-LINK TL-WN320G and so on. USB interface with plug and play, easy installation, high-speed transmission, no power supply and other characteristics, compatibility, very strong. Suitable for mobile office users as well as there is no free laptop PCMCIA interface users.

PCMCIA interface can also be divided into 16-bit PCMCIA and 32-bit CardBus. At present, most wireless mini pci-e bluetooth wifi card is available in 32-bit CardBus interface, such as TP-LINK TL-WN610G, etc. The interface also has a plug and play, high-speed transmission and so on. In fact, PCMCIA interface, better integration with the laptop, together with the effect of the use of better, but also can save a USB port.

In addition, there is a common PCI interface, a wireless network card, the card for desktop computers, installing them is relatively complicated.

3 maximum transmission distance

In the product specification is generally marked on the wireless card’s theoretical maximum transmission distance, the actual distance is less than positive mark value. Many consumers buy wireless network card in order to share Internet access, live in the house if the relatively large, or from the wireless router (or wireless AP) distance from the distant, the purchase of the wireless card products are often of particular concern when the maximum transmission distance of , over-emphasis on maximum transmission distance

In the wireless local area network, the receive and transmit signals using the transmission medium is air, radio signals are susceptible to atmospheric noise, the environment and the interference of other signal transmitting equipment, in particular, wireless network equipment, radio-wave devices, such as household microwave ovens, cordless phones , similar wireless LAN equipment. If at home or near the source of these disturbances will affect the wireless card to receive and transmit signals a distance.

In fact, China’s current average home, install an IEEE 802.11b-compliant wireless LAN and wireless routers, within the field of vision, without obstructions or other interference sources, the wireless signal can basically cover most of the space. The past two years the factory standard IEEE 802.11g wireless LAN products, the largest distance have some improvement.

Therefore, when buying the wireless card, most well-known brand-name products is not the gap between the transmission distances, do not over-emphasis on maximum transmission distance indicators.

4 security mechanisms

Through the WEP and other encryption technology can ensure the wireless LAN to send and receive data security, prevent unauthorized users intrusion. The higher bits WEP encryption, hacking more difficult the larger the higher the safety factor.

At present, the wireless LAN security mechanisms used include WEP data encryption, WPA encryption, IEEE 802.1X authentication. Most wireless LAN products support these security mechanisms, different is that support for WEP encryption bits is different from present, most wireless LAN products support 64/128 bit WEP encryption, and some product support 152-bit WEP encryption, a small amount of product support 256-bit encryption

So,t he purchase of your home wireless mini pci-e card, when used according to their own wireless router or wireless AP to select the appropriate wireless mini pci card, such as the wireless router set up 152 WEP encryption, you must choose to support 152-bit WEP encryption The wireless card products.