My Netwok Dictionary

Three things to keep in mind to keep your wireless network more secure, not only to prevent outsiders from using the link to download things, but also to prevent spy on and steal information.

1. Put password:

If the network is open (no password), anyone can connect to it. In the best case it could simply browse and download files. But since there are no limitations a malicious person could also use your connection for criminal or spy in search of confidential information like passwords, credit cards, documents, photos etc. Read the rest of this entry »

The security of wireless transmissions can be difficult to achieve where there are wireless networks, security is reduced. This has been a problem since the early days of the WLAN. At present, many administrators are not concerned to implement effective security practices.

Several new protocols are emerging and security solutions such as Virtual Private Networks (VPN) and Extensible Authentication Protocol (EAP). In the case of CAS, the access point provides client authentication, but passes the task to a more sophisticated device, possibly a dedicated server, designed for this purpose. With an integrated server, VPN technology creates a tunnel over an existing protocol such as IP. This is a Layer 3 connection, unlike Layer 2 connection between the AP and the sending node. Read the rest of this entry »

A wireless network can be comprised of only two devices. The nodes can be simple workstations of desktop or handheld computers. It equipped with not wireless, a network can be established ‘ad hoc’ comparable to a wired network peer to peer. Both devices work as servers and clients in this environment. Although it provides connectivity, security is minimal, as the transfer rate. Another problem with this type of network is compatibility. Many times, the NIC from different manufacturers are not compatible.

To solve the compatibility problem is usually installed an access point (AP) to act as a central hub for infrastructure mode WLAN. The AP is connected by wiring to the wired LAN to provide Internet access and connectivity to the wired network. The AP is equipped with antennas and provides wireless connectivity to a specific area that receives the name of cell. According to the structural composition of the place where the AP is installed, the size and gain of the antennas, the size of the cell can vary greatly. Generally, the range is 91.44 meters to 152.4 meters (300 to 500 feet). To service larger areas, you can install multiple access points with a certain degree of overlap. Read the rest of this entry »

It is increasingly common to find that when you set up a connection in the home is counted with wireless access for both computers and mobile devices to access the Internet. However, many users can enter questions when talking about the security of a wireless network. Today we will try to clarify the main concerns on this issue. At the time of a wireless network, the user should take several precautions in regard to the same settings, including the level of security desired for the network.

It is always recommended that a wireless network is encrypted to prevent an outsider she can connect and access resources that should not, such as photographs or personal records. Unlike wired networks, data transmitted in one of these networks are “on air”, so there are no physical restrictions for an outsider to intercept communications. For this reason, it is important that the data are transmitted encrypted between the teams and the router. Read the rest of this entry »

An understanding of regulations and standards that apply to wireless technology will enable interoperability and compliance with all existing networks. As in the case of wired networks, the IEEE is the main generator of standards for wireless networks. The standards have been established under the regulations established by the Federal Communications Committee (Federal Communications Commission - FCC).

The key technology that contains the 802.11 standard is Spread Spectrum Direct Sequence (DSSS). The DSSS is applied to wireless devices that operate within a range of 1 to 2 Mbps DSSS A system can transmit up to 11 Mbps, but if operating above 2 Mbps are considered not compliant. Follows the 802.11b standard was approved, which increased transmission capabilities to 11 Mbps DSSS WLAN Although they could interoperate with WLAN Spread Spectrum Frequency Hopping (FHSS), problems that motivated the manufacturers to changes in design. In this case, the IEEE task was simply to create a standard to coincide with the solution manufacturer. Read the rest of this entry »

The Internet is the most important data network in the world. The Internet is collected of a big quantity of interconnected small and large networks. Individual computers are the sources and destinations of information through the Internet. Wireless Internet connection can be divided into physical connection and logical connection applications.

A physical connection is connecting an adapter card, such as a modem or a NIC, from a PC to a network. The physical connection is utilized to transfer the signs among the different PC inside the network of local area (LAN) and toward the remote devices that are found on the Internet. Read the rest of this entry »

Construction of double-layer radio access network in the micro-cell network, the wireless LAN system is used as the theme of the network. For the combination of the macro cell network, saving IP allocation, while addressing the network resources and cost. What specifically is the principle of it?

The wireless LAN system consists of wireless access points AP (Access Point), wireless LAN, wireless bridge components, wireless access point AP is used in all the coverage, coverage for indoor 80m, outdoor 500m, can support up to 63 user access. The wireless LAN system follows the 802.11b standard and using direct sequence spread spectrum technology (DSSS), with DBPSK, DQPSK, CCK three types of modulation. Read the rest of this entry »

Distance and speed:

If the two wireless devices close to each other, they will be supported by two interfaces to communicate with the maximum transmission rate. However, if the maximum transmission rate of communication, the transmission distance may be smaller than a lower transmission rate transmission distance. Read the rest of this entry »

With the use of “defense in depth” approach, like all good security policies, wireless network security should be achieved at multiple levels. Enterprise-class wireless solutions, the most common security measures include authentication, encryption and access control.

1. The wireless authentication:

Traditional wired network using the “user name and password” for authentication has been for many years. CHAP, MSCHAP, MS-CHAPV2 and EAP-MD5 query is the infrastructure for wired and dial-up passwords frequently used query mechanism. The identity authentication is system based on a password hashing and authentication server for a random query. Although the password hash / query system in a cable infrastructure has been quite reliable, but is now shown to wirelessly deploy the same authentication mechanism is defective. Capture or listen through the radio frequency in the data packet authentication, hackers can use common tools for dictionary attack to find the password for the air transport, through the middle attacks to steal session information, or try to replay attacks. Read the rest of this entry »

Network security mechanisms have its own protocol standards, as our society has its own laws bound to ensure social stability. WLAN security standards on wireless networks is the main content of this paper to understand the wireless network WLAN security standards, we want to help.

Wireless Network WLAN security standards, there are basically three types, namely, WEP, WPA, and WAPI.

1. WEP:

WEP (Wired Equivalent Privacy) is the 802.11b security standards used for providing an encryption mechanism to protect the security of the data link layer, so that wireless data transmission network WLAN and wired LAN security to achieve the same level. WEP uses RC4 symmetric encryption algorithm. By pre-AP and the wireless card in the shared key in the communication, WEP standard transfer procedures to create a specific packet initialization vector (IV), the key is combined with pre-generated encryption for data packet encryption key. Receiving application to receive the initialization vector, and its combination with the local pre-shared key is to recover the encryption key. Read the rest of this entry »