ZyXEL Communications PLA-470 V2 - V3.0.5 Przewodnik Instalacji Pobierz pdf (Strona 104)

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101

Virtual Private Networks

The purpose of the virtual private networks, or VPN, is to provide an end-to-end

secured tunnel between a client and a server. VPN are used, among other things, to

identify and to authorize access as well as to encrypt any traffic flowing in the

network.

To date, IPsec is the protocol that is the most used in VPN. IPsec, the reference

standard, is based on various protocols and algorithms according to the desired

security level:

•

authentication by public-key electronic signature (RSA);

•

integrity control by hash function (MD5);

•

confidentiality by means of symmetric algorithms, such as DES, 3DES, AES,

IDEA, blowfish, and so forth.

The use of a VPN is the most reliable way to secure a wireless network. This

method is also the most used.

IEEE 802.1x and Improvements to PLC Network Security 85

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