翻訳と辞書 Words near each other ・ virtual machine environment ・ virtual machine/conversational monitor system ・ virtual machine/esa ・ virtual machine/system product ・ virtual machine/xa ・ virtual memory ・ virtual memory system ・ virtual path ・ virtual point of presence ・ virtual pop ・ virtual private network ・ virtual reality ・ virtual reality modeling language ・ virtual sequential access method ・ virtual server ・ virtual shredder ・ virtual software factory ・ virtual storage access method ・ virtual storage extended ・ virtual telecommunications access method Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク virtual private network ： FOLDOC Virtual Private Network (VPN) The use of encryption in the lower protocol layers to provide a secure connection through an otherwise insecure network, typically the Internet. VPNs are generally cheaper than real private networks using private lines but rely on having the same encryption system at both ends. The encryption may be performed by firewall software or possibly by routers. Link-level (layer 2 and 3) encryption provides extra protection by encrypting all of each datagram except the link-level information. This prevents a listener from obtaining information about network structure. While link-level encryption prevents traffic analysis (a form of attack), it must encrypt/decrypt on every hop and every path. Protocol-level encryption (layer 3 and 4) encryption encrypts protocol data but leaves protocol and link headers clear. While protocol-level encryption requires you to encrypt/decrypt data only once, and it encrypts/decrypts only スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.