What does SYN Flooding attack mean?
The SYN Flooding attack is carried out against the three-way handshake of the TCP connection. The principle is to maintain too many half-open connections on the attacked host, exhausting all relevant resources, and causing normal user requests to fail to respond due to the lack of resources [ 1]. Generally, such attacks have the following characteristics:
1) During the attack, the frequency of TCP connection requests sent by the attacking host will greatly exceed L / T (L: the maximum number of half-open connections of the server, T: the timeout of half-open connections). That is, when an attack occurs, the link near the server must be flooded with high-strength TCP connection request packets;
2) The attacker's high-frequency transmission will last for a considerable period of time, and the longer the duration, the more serious the impact of the attack, but the greater the possibility of being tracked;
3) The attacker must forge the source address of the request message. These attack packets may continuously change the forged address, or may use the same forged address. However, these addresses must be invalid addresses that cannot be routed to the destination or inactive valid addresses, otherwise the forged host will send a RST message to release the half-open connection, causing the attack to fail. Feature 1 and feature 2 are necessary conditions for an attack to occur, feature 3 is a sufficient condition for an attack to occur, and satisfying three features at the same time is a sufficient and necessary condition for an attack to occur. Therefore, in the implementation of attack detection tools, it becomes a key indicator to determine whether an attack has occurred.
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Planar Die Construction Sealed Glass Case Ideally Suited for Automated Insertion - 75V Nominal Zener Voltages
Case: MiniMELF, Glass Terminals: Solderable per MIL-STD-202, Method 208 Polarity: Cathode Band Approx. Weight: 0.05 grams= 25°C unless otherwise specified Symbol Pd VF RqJA Tj, TSTG Value to +175 Unit mW V K/W °C
Characteristic Forward Voltage = 200mA Thermal Resistance, Junction to Ambient Air (Note 2) Operating and Storage Temperature Range Notes:
1. Tested with Pulses, 20ms. 2. Valid provided that Electrodes are kept at Ambient Temperature.
1. Tested with pulses = 20 ms. 2. Valid provided that electrodes are kept at ambient temperature.
VZ, ZENER VOLTAGE (V) Fig. 1, Zener Current vs Zener Voltage
25 20 VZ, ZENER VOLTAGE (V) Fig. 8, Zener Current vs Zener Voltage
TA, AMBIENT TEMPERATURE (°C) Fig. 3, Power Dissipation vs Ambient Temperature
15 20 VZ, ZENER VOLTAGE (V) Fig. 4, Differential Zener Impedance
VZ, ZENER VOLTAGE (V) Fig. 5, Junction Capacitance vs Zener Voltage
MINI MELF,Smd mini melf,zener mini melf,mini melf package,mini melf resistor,mini melf diode,mini melf resistor datasheet
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