My Netwok Dictionary

1. Can the user “see” the WLAN?
If the utility does not show the user’s client service set indentifier (SSID) of your WLAN, you can use a WLAN WIDS or manager to identify and verify the operation of remote access point closest to the user. If all access points are operational, Use case testing portable tool to “hear” the SSID in the location of the user.

If the meter you see the SSID but no, check that there has been no hardware or software problems of the client (for example, disable the driver old / damaged). Verify that the client uses a standard and a domain compatible (ie, exclude the channel and modulation coupled correctly). Consider the signal strength: if the signal-to-noise meter is low, the access point may be too far because a client can see it very powerful. Note that the client may have difficulty seeing your SSID if your access point does not carry the broadcast SSID or multiple SSIDs do not send in the same signal. Read the rest of this entry »

One of the applications most used is DDR ISDN (telephone call routing on demand) to be able to send traffic when the router deems interesting. DDR allows two or more routers to connect installations, conventional analog dial as needed. DDR normally used for casual connections, such as telecommuters, small offices, customers, etc.

Configuring DDR

The DDR configuration process defined in the following steps:

1. Define static routes

2. Specify interesting traffic

3. Configure the dialing information
Define a static route to the destination:

Router (config) # ip route [destination network address + mask] [next hop address / output interface] [admin distance.] [Permanent] Read the rest of this entry »

Adequate infrastructure

The first thing to do when setting up a wireless network is to position intelligent access points depending on the area that you want to cover. It is not uncommon for the actual coverage is much greater than desired, in which case it is possible to reduce the power of the base station to adjust its scope to cover the area.

Avoid Defaults

During the first installation of an access point, it is configured with default values, including respect the password of the administrator. Many budding directors consider that from the moment the system works it is unnecessary to change the configuration of the access point. However the default settings are such that security is minimal. It is therefore imperative to connect to the administration interface (usually via a web interface on a port -specific access terminal) in order to define a password administration. Read the rest of this entry »

The network equipment supplier will cease development and manufacture of base stations for WiMax to focus on IP networks to which they are connected. Cisco had truly entered into the WiMax market in 2007 following the acquisition of Navini Networks Texans for 330 million dollars. At the time, it saw an excellent opportunity to develop broadband Internet access in emerging countries.

Since WiMax has gradually been overshadowed by the LTE (Long-Term Evolution) as a platform for future 4G mobile communication networks. LTE has the support of industry players in GSM. In addition, it is on the roadmap of the major operators have already made the choice of technology for future 4G mobile networks. Read the rest of this entry »

A broadband connection allows the introduction of broadband Internet at home. And with wireless LAN - also called “Wi-Fi” (Wireless-Fidelity, abbreviation constructed along the lines of “Hi-Fi”) - you can have this access on various computers scattered throughout the house, even close, without cable. And with the Wi-Fi products today, sharing an Internet connection is not only inexpensive and easy to use but also safe. This guide shows how to distribute high-speed Internet access to multiple laptops or desktop and how to build a secure network.

To set up a Wi-Fi, you need
a wireless router (top in photo) and an adapter for each system connected
- PCI card (left) for a desktop computer, PC Card (right) for a laptop.

The heart of a wireless LAN is a router. For example, we used the DI-624 AirPlus Xtreme G 802.11g D-Link. We also need a wireless adapter for each system that could connect to the network. We set up to do a PC Card DWL-G650 on a laptop running Windows 2000 and a DWL-G520 PCI adapter on a desktop computer using Windows XP Home Edition. As for the main computer, connected to the router via an Ethernet cable, it was under the control of Windows XP Professional edition.

Read the rest of this entry »

Mobility
Wireless networks provide users with LAN access a real-time information anywhere within the organization or public environment (limited area) in which they are deployed.

Simple and Fast Installation
The installation of a WLAN is fast and easy and eliminates the need to run wires through walls and ceilings. Read the rest of this entry »

WEP is the first and the lowest standard of wireless security. You will hear security experts say that WEP can be cracked in 5 minutes, which is true, that once you’ve sniffed the traffic network sufficient to weak IVs. WEP can be cracked, because it uses the same key for each data frame, so with enough traffic, you can capture the key. WEP is more difficult to crack because firmwares update to help prevent the transmission of data packets small.

WPA (Wi-Fi Protected Access) is the improved version of WEP. WPAs main response to the vulnerability of WEP is that instead of using the same key for each data frame it changes the keys. The key rotation is in much more difficult for a hacker to enter the key shared together. WPA also allows wireless clients to roam from access point to access point while working in a corporate environment over effectively. Read the rest of this entry »

1. Locate the access point or wireless router in a central location
   Whenever possible, try placing the wireless router in a central location in our house. If instead we place the wireless router near a wall will weaken the signal more quickly.A priori not worry if you can not move the router to another location, there are still many things you can do to improve.
2. Do not place the router on the floor, or near walls or metal objects.
   The metal significantly affects the signal, producing unexpected rebound effects. The walls, and floors can affect whether a similar way inside is steel mesh, which is rather common in the way of building our country.The closer the router of these elements the weaker the signal that starts from that location.

Read the rest of this entry »

Wireless devices are very popular and are used in different ways and for different purposes. Examples of use would be the AM and FM radio, cordless phones, cell phones, satellite communications and communication WiMAX (Worldwide Interoperability of Microwave Access) and Wi-Fi. These techniques use a wireless frequency spectrum authorized or which does not require a license.

Among the hottest technologies in the market, Wi-Fi and WiMAX are showing a huge increase in deployment of products and services. This article will highlight the difference between the two technologies according to how they relate to standards development and positioning of the solution. Read the rest of this entry »

A network protocol is a standard set of rules standard-standard, which specifies the method to send and receive data between multiple computers.

No single network protocol, and may coexist on the same computer multiple protocols installed, it is possible that a computer belonging to different networks.

This variety of protocols can be a security risk: each network protocol installed on a Windows system is available for all network adapters in the system, physical (network card or modem) or software (VPN adapters). If network devices or protocols are not properly configured, we can be giving unwanted access to our resources.

The simplest safety rule is to have installed the necessary number of protocols, both now and in most cases should suffice to only TCP / IP. Read the rest of this entry »