cisco ccna r&s introduction to networks

cisco ccna r&s introduction to networks

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The working key of the DES algorithm; Data is also 8 bytes and 64 bits, which is the data to be encrypted or decrypted; Mode is From the technical point of view, there are 6 basic types of firewalls : ①Packet filtering type; ②Proxy server type; ③Circuit layer gateway; ④Hybrid type; ⑤Application layer gateway; ⑥Adaptive proxy technology. Cisco hardware firewall configuration and management 1) Fair firewall installation The establishment of a firewall is based on a careful analysis of the network's service functions and topological structure. At the periphery of the protected network, through the integration of dedicated hardware, software and management measures, it provides means to monitor, control and even modify the information that crosses the network boundary. . 7.3.3 Trojan Horse Describe the name of the internal or external network interface. Data will leave PIX through this interface The application of quantum technology in cryptography is divided into two categories: one is the use of quantum computers to analyze traditional cryptosystems; the other is the use of single-photon uncertainty principle to achieve key management and information encryption at the fiber level. That is quantum cryptography. Large scale quantum computers is equivalent to a parallel computing system over the traditional sense, in a few seconds using a quantum computer can decompose the bell the RSA 129 public key. According to the development of the Internet, the all-fiber network will be the development direction of network connections in the future. The use of quantum technology can realize the traditional cryptosystem, complete key exchange and information encryption at the fiber level, and its security is based on Heisenberg 's uncertainty In principle,cisco ccna r&s introduction to networks, if an attacker attempts to receive and detect the information ( polarization ) of the information sender , it will cause a change in the quantum state. This change is irreversible for the attacker, but can easily Detect whether the information is under attack. At present, quantum encryption technology is still in the research stage ( in a leading position in our country ) , and the effective distance of its quantum key distribution QKD on the optical fiber cannot meet the requirements of long-distance optical fiber communication.

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Latest Cisco CCNA 200-301 Dumps

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