AMPS

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The AMPS was designed for voice transmission is a technology that is used to allow data over the same voice channels with a frequency of 800 MHz. The cellular data transfer needs a connection between every end just like a voice session. During this connection the cellular data transmission sends data over the airlink (through a PSTN (Public Switched Telephone Network)) to the remote computer.

For a well cellular phone have been utilize radio signals originally radio performance losses signals because of interference of noise and channel degradation which affect data transmission. Therefore ETC (Enhanced Throughtput Cellular) have been introduced to control data compression, error correction and modulation to provide faster reliable transmission along with MNP(Mircrocom Network Protocol)..

Wi-Fi Security Concerns

WLANs have additional security threats to consider that are RF in nature. Protocol-level attacks that attempt to penetrate Wi-Fi data security include rogue access points, authentication attacks, evil twin access point, man-in-the-middle, Wi-Fi phishing, and malicious eavesdropping. Most of these attacks exit at layer 2 of the OSI model. Proper authentication, encryption, and segmentation security solutions can be implemented to mitigate many of these well-known attacks. Layer 2 security monitoring solutions can also be put in place to detect when layer 2 attacks are taking place.

But a major oversight in current wireless intrusion detection systems (WIDS) solutions is that they have been unable to detect layer 1 security threats WIDS typically use 802.11 radio cards that have limited layer 1 visibility. They are only capable of monitoring high-level layer 1 statistics such as received signal strenght and signal-to-noise ratio (SNR) across a channel. These limited capabilities are completely insufficient for full spectrum analysis. For this reason, the 802.11 radio card that resides in a mobile or sensor-based WIDS solution can perform only layer 2 security monitoring and layer 2 performance analysis. With that in mind, it should be understood that the only effective tool for accomplishing proper layer 1 spectrum analysis and layer 1 security monitoring is a true spectrum analyzer.