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The network interface layer, also commonly referred to as the data link layer or link layer, is the lowest layer in the TCP/IP model. This particular layer has several unique security vulnerabilities that can be exploited by a determined adversary. == Network interface layer == The network interface layer, commonly referred to as the data link layer, is the physical interface between the host system and the network hardware. It defines how data packets are to be formatted for transmission and routings. Some common link layer protocols include IEEE 802.2 and X.25.〔(【引用サイトリンク】url=http://sourcedaddy.com/windows-xp/the-tcp-ip-protocol-framework.html )〕 The data link layer and its associated protocols govern the physical interface between the host computer and the network hardware. The goal of this layer is to provide reliable communications between hosts connected on a network. Some of the services provided by this layer of the network stack include:〔(【引用サイトリンク】url=http://web.cs.wpi.edu/~cs4514/b98/week3-dll/week3-dll.html )〕 *Data Framing - Breaking up the data stream into individual frames or packets. *Checksums - Sending checksum data for each frame to enable the receiving node to determine whether or not the frame was received error-free. *Acknowledgment - Sending either a positive (data was received) or negative (data was not received but expected) acknowledgement from receiver to sender to ensure reliable data transmission. *Flow Control - Buffering data transmissions to ensure that a fast sender does not overwhelm a slower receiver. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Network interface layer security」の詳細全文を読む スポンサード リンク
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