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FDDI
Fiber Distributed Data Interface is a Token Ring type of technology that utilizes encoded light pulses transmitted via fiberoptic cabling for communications between computer systems. It supports a data rate of 100 Mbps and is more likely to be used as a LAN backbone between servers. It has redundancy built in so that if a host on the network fails, there is an alternate path for the light signals to take to keep the network up.
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A high-speed token-passing technology that employs two rings with traffic flowing in opposite directions. FDDI offers transmission rates of 100 Mbps and is often used as a backbone to large enterprise networks. LAN standard, defined by ANSI X3T9. 5, specifying a 100Mbps tokenpassing network using fiberoptic cable, with transmission distances of up to two kilometers. FDDI uses a dualring architecture to provide redundancy.
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Highspeed, lowerror data network covering a relatively small geographic area (up to a few thousand meters). LANs connect workstations, peripherals, terminals, and other devices in a single building or other geographically limited area. LAN standards specify cabling and signaling at the physical and datalink layers of the OSI model. Ethernet, FDDI, and Token Ring are widely used LAN technologies. Compare with MAN and WAN.
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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 common shared media LAN technology. A LAN technology that is in wide use today utilizing CSMA/CD (Carrier Sense Multiple Access/Collision Detection) to control access to the physical medium (usually a category 5 Ethernet cable). Normal throughput speeds for Ethernet are 10 Mbps, 100 Mbps, and 1 Gbps.
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The term “computer forensics” was coined in 1991 in the first training session held by the International Association of Computer Specialists (IACIS) in Portland, Oregon. Since then, computer forensics has become a popular topic in computer security circles and in the legal community. Like any other forensic science, computer forensics deals with the application of law to a science. In this case, the science involved is computer science and some refer to it as Forensic Computer Science. Computer forensics has also been described as the autopsy of a computer hard disk drive because specialized software tools and techniques are required to analyze the various levels at which computer data is stored after the fact. Computer forensics deals with the preservation, identification, extraction, and documentation of computer evidence. The field is relatively new to the private sector, but it has been the mainstay of technologyrelated investigations and intelligence gathering in law enforcement and military agencies since the mid1980s. Like any other forensic science, computer forensics involves the use of sophisticated technology tools and procedures that must be followed to guarantee the accuracy of the preservation of evidence and the accuracy of results concerning computer evidence processing. Typically, computer forensic tools exist in the form of computer software.
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