Wednesday, June 3, 2009

10 tips for improving your wireless network

10 tips for improving your wireless network

If Windows ever notifies you about a weak signal, it probably means your connection isn't as fast or as reliable as it could be. Worse, you might lose your connection entirely in some parts of your home. If you're looking to improve the signal for your wireless network, try some of these tips for extending your wireless range and improving your wireless network performance.

10 tips for improving your wireless network

Position your wireless router (or wireless access point) in a central location

When possible, place your wireless router in a central location in your home. If your wireless router is against an outside wall of your home, the signal will be weak on the other side of your home. Don't worry if you can't move your wireless router, because there are many other ways to improve your connection.

Bad router and good router comparison

Move the router off the floor and away from walls and metal objects (such as metal file cabinets)

Metal, walls, and floors will interfere with your router's wireless signals. The closer your router is to these obstructions, the more severe the interference, and the weaker your connection will be.

Replace your router's antenna

The antennas supplied with your router are designed to be omni-directional, meaning they broadcast in all directions around the router. If your router is near an outside wall, half of the wireless signals will be sent outside your home, and much of your router's power will be wasted. Most routers don't allow you to increase the power output, but you can make better use of the power. Upgrade to a hi-gain antenna that focuses the wireless signals only one direction. You can aim the signal in the direction you need it most.

Standard antenna and hi-gain antenna examples

Replace your computer's wireless network adapter

Wireless network signals must be sent both to and from your computer. Sometimes, your router can broadcast strongly enough to reach your computer, but your computer can't send signals back to your router. To improve this, replace your laptop's PC card-based wireless network adapter with a USB network adapter that uses an external antenna. In particular, consider the Hawking Hi-Gain Wireless USB network adapter, which adds an external, hi-gain antenna to your computer and can significantly improve your range.

Laptops with built-in wireless typically have excellent antennas and don't need to have their network adapters upgraded.

Wireless router and wireless repeater

Add a wireless repeater

Wireless repeaters extend your wireless network range without requiring you to add any wiring. Just place the wireless repeater halfway between your wireless access point and your computer, and you'll get an instant boost to your wireless signal strength. Check out the wireless repeaters from ViewSonic, D-Link, Linksys, and Buffalo Technology.

Wireless channels

Change your wireless channel

Wireless routers can broadcast on several different channels, similar to the way radio stations use different channels. In the United States and Canada, these channels are 1, 6, and 11. Just like you'll sometimes hear interference on one radio station while another is perfectly clear, sometimes one wireless channel is clearer than others. Try changing your wireless router's channel through your router's configuration page to see if your signal strength improves. You don't need to change your computer's configuration, because it'll automatically detect the new channel.

Reduce wireless interference

If you have cordless phones or other wireless electronics in your home, your computer might not be able to "hear" your router over the noise from the other wireless devices. To quiet the noise, avoid wireless electronics that use the 2.4GHz frequency. Instead, look for cordless phones that use the 5.8GHz or 900MHz frequencies.

Update your firmware or your network adapter driver

Router manufacturers regularly make free improvements to their routers. Sometimes, these improvements increase performance. To get the latest firmware updates for your router, visit your router manufacturer's Web site.

Similarly, network adapter vendors occasionally update the software that Windows XP uses to communicate with your network adapter, known as the driver. These updates typically improve performance and reliability. To get the updates, visit Microsoft Update, and then under Select by Type click Hardware, Optional. Install any updates relating to your wireless network adapter. It wouldn't hurt to install any other updates while you're visiting Microsoft Update, too.

Note When you go to Microsoft Update, you have two options: the Express Install for critical and security updates and Custom Install for high priority and optional updates. You may find more driver updates when you use Custom Install.

Pick equipment from a single vendor

While a Linksys router will work with a D-Link network adapter, you often get better performance if you pick a router and network adapter from the same vendor. Some vendors offer a performance boost of up to twice the performance when you choose their hardware: Linksys has the SpeedBooster technology, and D-Link has the 108G enhancement.

Upgrade 802.11b devices to 802.11g

802.11b is the most common type of wireless network, but 802.11g is about five times faster. 802.11g is backward-compatible with 802.11b, so you can still use any 802.11b equipment that you have. If you're using 802.11b and you're unhappy with the performance, consider replacing your router and network adapters with 802.11g-compatible equipment. If you're buying new equipment, definitely choose 802.11g.

Wireless networks never reach the theoretical bandwidth limits. 802.11b networks typically get 2-5Mbps. 802.11g is usually in the 13-23Mbps range. Belkin's Pre-N equipment has been measured at 37-42Mbps.

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Saturday, February 28, 2009

Online Tricky Staff

Double Click To Enlarge The Photo
Online Tricky Staff - Easy to do and Fun to do.

Fool your friends or buddies.

What it is ?

This is a trick to map the IP addresses to the wrong host names.

For example, you want to surf yahoo and you type

but the page appears to be or something else, like the picture above.

How to do ?

Just go to this following directory:


Or you can just use "Search" from "Start Menu".

2)Open the "Hosts" file with "Notepad"

3)Then open "Common Prompt" with "Win + R"

and type "cmd". Or Go to

"Start Menu - Programs - Accessories - Common Prompt"

4)And type "ping" and it will provided you an IP address of "Yahoo"

5)Wrote that IP in the hosts file and by spacing two or more type

any host name ... and save that file.

After all these steps, just go to open Internet Explorer and type "".

You will find out the different or what kind of trick that you are learning exactly.

If you like it and you found interesting, comment will be appreciated. Thz :)

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Sunday, February 22, 2009

Reasons Of Outsourcing Or Outsourcing Factors

Outsourcing is subcontracting a process, such as product design or manufacturing, to a third-party company. The decision to outsource is often made in the interest of lowering firm or making better use of time and energy costs, redirecting or conserving energy directed at the competencies of a particular business, or to make more efficient use of land, labor, capital, (information) technology and resources.

Reasons Of Outsourcing

  • Legacy systems and sometimes the staff that manages them can be replaced with something newer and better.
  • An outside contractor handles personnel-related issues such as training, hiring and firing, and compensation. This may resolve problems with turnover, pay scales, job classifications, affirmative action, unions, and other personnel problems that management wants to avoid.
  • The costs of the service are fixed and readily calculated
  • Temporary work overloads becomes vendor's responsibility
  • The company's resources can be allocated to the principal line of business
  • The company may lack in-house skills or need to free up in house staff for other duties
  • Higher service quality and cost savings are expected.

Other factors to consider in outsourcing agreement
  • Software licenses may need to be transferred to the outsourcing vendor so that it can be authorized to act on your behalf. You may still be responsible for licensing, maintenance, and upgrade costs.
  • Unless the contract provides specifically for disaster recovery, you may need to retain responsibility for managing the risks and planning for recovery actions.
  • If the outsourcing vendor replaces your existing systems, you may have the responsibility of removing the old equipment and disposing of it.

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Saturday, February 21, 2009

IPV4 Vs IPV6 And The Differences ...

Difference Between IPv4 and IPv6
  1. Source and destination addresses are 32 bits (4 bytes) in length.
  2. IPSec support is optional.
  3. IPv4 header does not identify packet flow for QoS handling by routers.
  4. Both routers and the sending host fragment packets.
  5. Header includes a checksum.
  6. Header includes options.
  7. Address Resolution Protocol (ARP) uses broadcast ARP Request frames to resolve an IP address to a link-layer address.
  8. Internet Group Management Protocol (IGMP) manages membership in local subnet groups.
  9. ICMP Router Discovery is used to determine the IPv4 address of the best default gateway, and it is optional.
  10. Broadcast addresses are used to send traffic to all nodes on a subnet.
  11. Must be configured either manually or through DHCP.
  12. Uses host address (A) resource records in Domain Name System (DNS) to map host names to IPv4 addresses.
  13. Uses pointer (PTR) resource records in the IN-ADDR.ARPA DNS domain to map IPv4 addresses to host names.
  14. Must support a 576-byte packet size (possibly fragmented).


  1. Source and destination addresses are 128 bits (16 bytes) in length.
  2. IPSec support is required.
  3. IPv6 header contains Flow Label field, which identifies packet flow for QoS handling by router.
  4. Only the sending host fragments packets; routers do not.
  5. Header does not include a checksum.
  6. All optional data is moved to IPv6 extension headers.
  7. Multicast Neighbor Solicitation messages resolve IP addresses to link-layer addresses.
  8. Multicast Listener Discovery (MLD) messages manage membership in local subnet groups.
  9. ICMPv6 Router Solicitation and Router Advertisement messages are used to determine the IP address of the best default gateway, and they are required.
  10. IPv6 uses a link-local scope all-nodes multicast address.
  11. Does not require manual configuration or DHCP.
  12. Uses host address (AAAA) resource records in DNS to map host names to IPv6 addresses.
  13. Uses pointer (PTR) resource records in the IP6.ARPA DNS domain to map IPv6 addresses to host names.
  14. Must support a 1280-byte packet size (without fragmentation).

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Digital Vs Analog ( Advantages & Disadvantages )

Definition of Digital
A method of storing, processing and transmitting information through the use of distinct electronic or optical pulses that represent the binary digits 0 and 1.

Advantages of Digital -
  • Less expensive
  • More reliable
  • Easy to manipulate
  • Flexible
  • Compatibility with other digital systems
  • Only digitised information can be transported through a noisy channel without degradation
  • Integrated networks

Disadvantages of Digital -

  • Sampling Error
  • Digital communications require greater bandwidth than analogue to transmit the same information.
  • The detection of digital signals requires the communications system to be synchronised, whereas generally speaking this is not the case with analogue systems.

Definition of Analogue
Analogue is a transmission standard that uses electrical impulses to emulate the audio waveform of sound. When you use a phone, the variations in your voice are transformed by a microphone into similar variations in an electrical signal and carried down the line to the exchange.

Advantages of Analogue -

  • Uses less bandwidth
  • More accurate

Disadvantages of Analogue -

  • The effects of random noise can make signal loss and distortion impossible to recover

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