arp

I. ARPARP protocol is run in network System Data Link layer protocol, used in LAN, when know to send destination host IP address and port number but do not know MAC address, need to use ARP is also called Address Resolution Protocol; Because the data link layer transmits the data format is the frame, The receiver is received by the physical layer and the data link layer before reaching the network layer, therefore, in the data transmission is required

From: http://zhidao.baidu.com/question/50940165.html? Fr = qrl 1. Clear ARP cache You may have used the ARP Instruction Method to Solve the ARP spoofing problem. This method is used to solve the ARP spoofing principle. In general, ARP spoofing confuses network devices by sen

"Editor's note: We talked about the killing method of ARP virus computer, this is the last article in this series, will tell you how to take measures to immune to ARP virus." 】 The network immunization measures of ARP virus Because of the various network characteristics of ARP virus, some technical means can be used

I. ARP virus:ARP is not the name of a virus, but a general term for a type of virus that uses ARP vulnerabilities. ARP is a protocol for TCP/IP protocol groups. It is used to translate network addresses into physical addresses (also called MAC addresses ). Generally, there are two types of attacks: route spoofing and gateway spoofing. It is a trojan virus that in

A brief account of ARP Arp:address resolution Protocol Address Resolution Protocol. Rarp:reverse Address resolution PROTOCOL reverse addressing Resolution protocol. Different network, such as Ethernet, token network ..., there are different addressing mechanisms on the data link layer. In Ethernet LAN, a host and another host communication contract, is based on the 48bit Ethernet address to determine the purpose of the interface, device drivers ne

There are a lot of ways to help prevent ARP viruses on the Internet. In fact, ARP spoofing is a simple principle and uses a "defect" of ARP ", free ARP to reach the arp table entry of the gateway on the spoofing host. Free ARP was

Recently, my website suddenly experienced slow access, and the anti-virus software immediately prompts that the website contains a trojan virus. I was wondering how virus prompts appeared recently when my website has been running well for four years. For reasons of professional habitsSource codeView, originally in the web page sourceCodeThe Program...... According to common sense, my heart is cold: it is estimated that the server is attacked, and all the file code is added with this code,

system first authenticates the MAC address for the first time. Only when the MAC address is valid can the DHCP Sever be allowed to assign an IP address to the terminal, this mainly uses 802.1x authentication protocol and radius Authentication Server. 3. Sometimes, you do not need to set an IP address to access the Internet. That is to say, you must dynamically obtain the IP address to access the Internet. This method is relatively simple and does not require any settings on the access layer, th

The ARP Address Resolution protocol is a TCP/IP protocol that obtains physical addresses based on IP addresses. It works in the second layer of the OSI seven-layer model-the data link layer.Using the ARP Address Resolution protocol, the destination hardware address (MAC address) information can be resolved according to the IP address information in the IP packet header of the network layer, in order to ensu

Address resolution provides mappings for two different address forms: 32bit IP and any type of address used by the data link layer.When a host sends an Ethernet data frame to another host on the same LAN, it is based on the Ethernet address of the 48bit instead of the IP address. The device driver never checks the destination IP address in the IP datagram.ARP provides dynamic mapping between the IP address and the corresponding hardware address.ExampleThis example is to connect the host BSDI via

Http://www.knowsky.com/383893.html Subnet Mask, the concept and working principle of the gateway and ARP Protocol are several important knowledge points that Beginners first encounter when learning network knowledge, among them, the role and basic working principle of subnet mask and ARP protocol is also the key and difficult point in Semester 1, a tutorial by Cisco Network Technology College. It is difficu

(Note: part of "Linux C programming One-stop learning")Ethernet (RFC 894) frame formatFigure One Ethernet packet typeThe source address and destination address refers to the network card's hardware address (also called MAC address), the length is 48 bits, is in the network card Factory curing. Take a look at the ifconfig command, the "HWaddr 00:15:f2:14:9e:3f" section is the hardware address. The Protocol field has three values, corresponding to IP, ARP