![]() ![]() ![]() Integrity : Keeping the information unaltered.Confidentiality : Keeping the information secret.What is the difference between encryption and hashing? Encryption For distinguishing active IP addresses (ICMP) Internet Control Message Protocol is a functioning IP addresses Stack Fingerprinting : the final stage of foot printing step can be performed, once the hosts and port have been mapped by examining the network, this is called Stack fingerprinting. Open Source Footprinting : It will search for the contact data of administrators that will be utilized for guessing password in Social Engineering Network Enumeration : The hacker attempts to distinguish the domain names and the network blocks of the target network Scanning : After the network is known, the second step is to spy the active IP addresses on the network. When receiving a packet whose source MAC address has an aging timer started, the PE resets the aging timer.Footprinting is nothing but accumulating and revealing as much as data about the target network before gaining access into any network. ![]() The aging mechanism used here is the aging timer corresponding to the MAC address. Remote MAC addresses learned by a PE that are related to VC labels but no longer in use must be aged out by an aging mechanism. If the message contains a null MAC address TLV list, these PEs remove all MAC addresses from the specified VSI, except for those learned from the PW that sent the message. There are two types of address reclaim messages: those with MAC address lists and those without MAC address lists.Īfter a backup link becomes active and a message with the instruction of relearning MAC entries arrives, a PE updates the corresponding MAC entries in the FIB table of the VPLS instance and sends the message to other PEs that are directly connected through LDP sessions. The address reclaim message is very useful when the network topology changes and you must remove the learned MAC addresses quickly. If NULL is specified, the device removes all MAC addresses of the VSI, except for those learned from the PW that received the address reclaim message. ![]() Upon receiving such a message, a device removes MAC addresses or relearns them according to the specified parameters in the TLV. The VPLS draft defines a dynamic address learning method that uses the address reclaim message, which carries MAC TLV. Dynamic address learning must support refreshing and relearning. ![]()
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