Aid Networks & Systems

There is no free lunch in this world. The same goes with Voice over Internet Protocol (VoIP) calls. The free VoIP calls have never been free of cost fully. More often than not, the objective is not to provide entirely free calls for all destinations, but to encourage the VoIP operator usage that is the most suitable for one. If you look back, you will realized that most VoIP companies only provide free phone calls made in their own network and a few of the uniquely chosen destination. Once you start making calls out of their designated network, you will be charged. This is the strategy implemented to draw users to the ‘talk for free’ promotion and the need to buy credits in order to make payable calls to other destinations.
There a number of choices that one can make for the preferred VoIP service.

Firstly, there are the direct PC to PC connections, PC to mobile phone connections or even PC to land-line connections. This is the most usual method of using VoIP as it only needs the VoIP software. One of the most famous free VoIP services used here is Skype. Skype allows free of charge conversations among other Skype users. Subsequently, it will be chargeable if calls are made to landlines or cellular phones. Another VoIP services that offer free calls made to landlines is Raketu. It does not only cater for 42 countries but provides live video television as well. The disadvantage side of this service is that it requires one to pay up front before utilizing their service. On the other hand, VOIP Cheap permits one to make non-chargeable calls to computers and regular landlines. However, the drawback is it is only limited to 300 minutes of talk time per week and per IP address too. After the limit has been exceeded, one will have to start paying for the service.

Secondly, one can obtain the free VoIP services from land-line or mobile phone connections that are routed to the Internet. Service from Jajah enables one to make free phone calls to either landlines or mobile phones for selected countries. Furthermore, there is the YouFon service provider where it will route calls from the Nokia E-Series phone to the Internet. It also allows you to call other registered YouFon users for free with a small sum of monthly fee.

Thirdly, the more advance technology used by the VoIP service is establishing a Wi-Fi or Ethernet connection between the VoIP phones directly and Internet Protocol (IP). Ooma is known to cater this service for users residing within US. It is called the peer-to-peer VoIP technology. Users can make free phone calls from within US only and they provide a limit up to 3000 minutes of talk time. The only thing that involves cost is the purchase of the specify device.

The potential dimension of the network dictates the classes of the IP address. Thus, these IP classes specify the kind of bits that were utilized for network identification, network ID. They are also utilized to check the bits that were used to check the host computer or the host ID. However, at present time, classless IP addressing has replaced these classes. A net mask can be linked to a specific range of IP address.

Conventionally speaking, these IP address classes were classified as class a, b, c, and d. The following paragraphs will further discuss these classifications.

The addresses that belong to class A are those with a huge number of hosts. Using the initial octet for the ID, 126 networks can be allowed by class A. The very first bit is present and is fixed to 0. The remaining bits are all one which then comprise the entire network ID. The host ID is completely represented by the 24 bits with a total of 24,000,000 hosts in a single host.

Medium sized network falls under class B. In this class, the initial two bits are pre-set to 10 whereas the remaining 6 bits in the octet comprise the host ID of 16,384 networks. The network number in this class starts at 128 and stops at 191. The addresses included in this group use the third’s and fourth’s octet in the 16 bits to function as the host ID which permits the functionality of the 65,000 hosts per network.

The third class addresses are primarily used in minor local area networks. It also allows a maximum of 2,000,000 networks for the ID.

The fourth group of the IP classes called class D is not utilized to host. These addresses are primarily used for multi-casting or they can also be used for future uses.

To monitor remotely an environment, an end-user makes use of Low Energy Adaptive Clustering Hierarchy for the sensor networks. To succeed in doing so, the specific data that come from the nodes are released to the central base. This is normally placed away from the main sensor network. The central base becomes the user’s way to access this data. A number of routing protocols can be utilized on these particular networks.

Routing begins when it searches for a mean to send a datagram from a given destination address. The mean is compares to the routing information from the so-called routing tables. Said table has entries for all the networks that router identifies, giving signal to the router to the adjacent router.

Conventional Sensor Networks Routing Protocols includes different procedures such as minimum transmission, clustering and multi-hopping. These procedures have drawbacks like not being able to attain all the properties. Low Energy Adaptive Clustering Hierarchy makes use of the formation of distributed cluster. It also leads the local processing that eventually reduces the global communication. Another function is having the capacity to conduct cluster head random rotation. All the aforementioned features allow Low Energy Adaptive Clustering Hierarchy to positively gain the desirable properties. There were also simulations that this is efficient protocol energy wise that also increases the system lifetime.

SPIN is another set of protocols that is used to send out information efficiently and effectively through a network of wireless sensor. Flooding valuable communication sources and gossiping waste are two approaches that are used to disseminate such information. These routing protocols function regardless of the resource. They likewise solve this drawback by a conventional data negotiation. The nodes that run SPIN provide a name to their data, thus calling them meta-data. Meta-data negotiations are performed before data transmission takes place eventually.

Playing games alone in home with your game console and large High definition LCD TV is enjoyable. However, there are lots of games that allow you to play game in multiplayer mode. The game era is now changing from standalone to multiplayer mode games. Standalone gaming was in the past. Today you can subscribe XBOX Live to play all of your multiplayer enabled games online. With XBOX Live, you can join into unified online games with anyone, anytime, anywhere. To allow you play online games in home with the gamer’s community, you need a secured system in home – a wireless gaming router.

Unlike wired multiplayer gaming where you can connect each of the game consoles via a workgroup switch with some friends, online gaming needs broadband internet connection. And the wireless gaming router is the main device you need to build a secured gaming infrastructure to allow you go live game wirelessly in the comfort of your living room without the clutter of the wires. The question is which one is the best for your online gaming?

Wireless routers for online gaming demands high performance and secured network including the speed, reliable connection, low noise or if possible free of signal attenuator, and secured for your internal network.

High Speed Connection

Gaming is a high intensive bandwidth application that demands high-speed either wired or wireless connection. Generally the game consoles are equipped with 100Mbps Ethernet port. For wired connection to your local network, 100Mbps Ethernet port provides reliable high-speed connection. What if you demand wireless connection? You need high-speed wireless technology – the wireless-n (draft) standard. Your wireless gaming router should be powered by this wireless -n technology. Wireless -n is the future of the wireless technology available in the market you can taste today.

Most routers with wireless -n technology also adopt smart wireless antenna MIMO technology. Even though many manufacturers do not specifically label their products with MIMO technology, but they adopt the technology integrated into their own technology such as RangeMax by Netgear and Xtreme n by D-Link.

Combination of wireless -n and MIMO technologies will increase the system performance and longer distance coverage.

Make sure that your wireless gaming router is powered by the draft 802.11n standard and MIMO antenna technology or other integrated technology.

Quality of Services

High intensive bandwidth applications demand high quality services. Your wireless gaming router should support high quality of services (QoS) technology. With QoS, the system can provide prioritization over the game application above other applications such as web browsing and files downloading. Many routers support intelligent QoS technology to allow prioritization both wired and wireless Internet traffic to enable enhanced gaming experience.

DMZ Support

Exposing the computer into the wild internet is vulnerable to the internet threats. Online gaming means exposing the network into the wild internet. A secured system is needed to protect your internal network against any types of internet threats. The best way to protect and separate your internal network from the exposed host can be done by creating a security boundary. DMZ feature is used to create a security boundary for the exposed host. It is therefore, your wireless gaming router should support the DMZ feature.

Dual-band Support

Many wireless routers support dual-band feature that support both 2.4 GHz (for wireless b/g/n standards) and 5 GHz (for wireless -a standards) frequency bands either selectable or simultaneously. The benefit of having dual band is that you can play games (and other HD video streaming media) with 5 GHz frequency band which is less noise than 2.4 GHz band.

We know that there are many sources of signal interference around you using 2.4 GHz frequency band such as cordless phones, microwave oven, automatic garage door, etc that contribute to signal attenuator. It is therefore, the wireless gaming router should support dual-band.

DGL-4500 D-Link

The DGL-4500 D-Link® Xtreme N Wireless Gaming Router is specifically designed for gamers in mind. DGL-4500 contains all the requirements the gamers demand for high performance router for speed, security, and services. It is powered by the award-winning GameFuel™ technology for smoother gaming, and it is also powered by dual-band wireless -n technology. The router is embedded by both Gigabit LAN and WAN ports for faster gaming.

DGL-4500 is powered by the GameFuel Priority technology to allow you customize network setting for game traffic prioritization. DGL-4500 also includes the network activity display to show you what’s going on with your router including Internet, LAN, WAN activities, and other various settings all from one screen. The included clock helps you see exactly how long you’ve spent playing the game.