Address Resolution Protocol，用于建立和维护IPv4（IPv6使用NDP协议）地址和MAC地址的动态映射。在一个局域网中（LAN），数据包通过MAC地址来寻址的（网络层的数据包被封装在二层数据帧中进行传输），但是IPv4是用IP地址来寻址。只知道IP地址，不知道MAC地址，数据包是 ...

ARP欺骗的原理可简单的解释如下：假设有三台主机A,B,C位于同一个交换式局域网中，监听者处于主机A，而主机B,C正在通信。现在A希望能嗅探到B->C的数据，于是A就可以伪装成C对B做ARP欺骗--向B发送伪造的ARP应答包，应答包中IP地址为C的IP地址而MAC地址为A的MAC地址。

As I understand things... An ARP request is a system querying an IP address and asking for the MAC associated with that address. Routers and switches send to MACs not IPs (right?) so they need to know ...

In last week’s post, I compared two sample test questions – a simple one, and a more exam-realistic one. The more realistic question required a deeper knowledge of the topic (ARP), and it required ...

A Cisco security advisory outlines weaknesses in its WLAN controllers that could lead to the kind of inadvertent denial of service attacks that affected Duke’s wireless net. Cisco has just released a ...