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Sniffer Attack
Any activity that results in a malicious user obtaining information about a network or the traffic over that network. A sniffer is often a packet-capturing program that duplicates the contents of packets traveling over the network medium into a file. Also referred to as a snooping attack.
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Highspeed switch that forwards packets between datalink segments. Most LAN switches forward traffic based on MAC addresses. This variety of LAN switch is sometimes called a frame switch. LAN switches are often categorized according to the method they use to forward traffic: cutthrough packet switching or storeandforward packet switching. Multilayer switches are an intelligent subset of LAN switches. Compare with multilayer switch. See also cutthrough packet switching, storeandforward packet switching.
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A piece of a packet. When a router is forwarding an IP packet to a network with a Maximum Transmission Unit smaller than the packet size, it is forced to break up that packet into multiple fragments. These fragments will be reassembled by the IP layer at the destination host. When a network receives a packet larger than its maximum allowable packet size, it breaks it up into two or more fragments. These fragments are each assigned a size (corresponding to the length of the fragment) and an offset (corresponding to the starting location of the fragment).
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The act of capturing packets from the network in hopes of extracting useful information from the packet contents.
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Software tool for auditing and identifying network traffic packets.
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A form of monitoring in which the flow of packets rather than the actual content of packets is examined. Also referred to as trend analysis. A type of security threat that occurs when an outside entity is able to monitor and analyze traffic patterns on a network.
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