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FDDI 1 vs FDDI 2

Fiber Distributed Data Interface (FDDI) is a data transmission standard for Local Area Networks (LAN) which uses fiber optic lines. A FDDI LAN can extend up to 200 kilometers and it can support thousands of users. The FDDI 1 protocol is based on the token ring protocol. FDDI 2 is an extended version of FDDI. It extends FDDI by adding capability to handle voice and video signals.

Difference between FDDI 1 and FDDI 2 (FDDI ii)

FDDI-2 is the second generation protocol of FDDI. The key difference between them is that, in addition to all the functionality FDDI provides, FDDI-2 provides the ability to handle voice signals and video. Even though both FDDI and FDDI-2 runs at 100 Mbits/sec on the fiber and transport asynchronous and synchronous types of frames, FDDI-2 can transport isochronous traffic using the newly developed hybrid mode. Further, FDDI and FDDI-2 stations can be operated in the same ring only in the basic FDDI mode

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Typically FDDI runs at 100 Mbps

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WANs can use FDDI networks

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FDDI networks can be up to 124 miles (200 kilometers) in length

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That is fiber optic cable, as FDDI stands for Fiber Distributed Data Interface

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FDDI refers to Fiber Disturbed Data Interface. Most people will just say FDDI for short. Most hoping, that the person in conversation knows what it stands for.

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Ring network

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Both Token Ring and FDDI use the concept of a ring topology structure. However, Token Ring is used in a LAN, and FDDI is used in a MAN.

Token Ring is implemented with copper cable (UTP cable) and FDDI uses Fiber Optic cable.

Finally, the protocols are very different between the two. FDDI uses a synchronous type of transmission, where Token Ring uses an actual token (a 3 character packet) to control who has access to transmit or receive on the network. FDDI does not use this technique.

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The acronym FDDI stands for Fiber Distributed Data Interface, which provides enhanced data transmission in a local area network.

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Fddi can be further connected to other networks whereas token ring is individual network of computers.

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Fiber Distributed Data Interface. . .

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Although they both use a rotating ring setup, the FDDI uses two to achieve better results and less chance of failure. FDDI also uses a timed protocol that leads to differences in frame format and how station traffic is controlled.

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Type your answer here... FDDI

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it is mainly used in FDDI protocol and USB

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FDDI is a dual-ring structure, usually found in MANs (metropolitan area networks). Although it has a physical ring structure it is not the same as a token ring network.

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Fiber Distributed Data Interface (FDDI) NICs are commonly used to connect host systems or file servers to FDDI network equipment using one connectin (single attachment) and to attach the network equipment to the FDDI cabling through two attachments (dual attachment).

FDDI is defined by the ANSI X3T9.5 standards committee and provides an access method to enable high-capacity data throughput on busy networks. It has a data throughput rate of 100Mbps, and is simliar to the token ring access method because it uses token passing for network communication.

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primary and secondary so it has "2"

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FDDI Advantages:

~Supports real time allocation of network bandwidth.

~Supports a lot of different types of network traffic.

~Is fault-tolerant because it uses dual fiber cables. If one cable fails FDDI moves the data to the other dual cable.

FDDI Disadvantages:

~It's expensive

~There is always a chance of multiple ring failures and as the ring grows, that chance increases.

~It's not used frequently due to cost, companies prefer to use copper (CDDI) if they are taking the ring approach.

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They incorporate technologies such as FDDI, DSL (digital subscriber line), satellite, and microwave communications

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Uses a dual ring of single-mode or multimode fiber-optic.

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Please do not re-ask the question in this area. This area is for people to answer.

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There are no purely functional differences between a token ring token bus implementation and FDDI. In fact, the token bus is defined in IEEE 802.4, and FDDI's topology derives from that very standard. Think of FDDI as being a subset of 802.4. Refer to RFC 1042 (http://www.faqs.org/rfcs/rfc1042.html) for more details.

The remainder of my entry doesn't really apply to this question and is more subjective, but I do try to outline some other non-functional differences between the two standards.

Apart from functional differences, the obvious ones can be broken into a couple different parts off the top of my head: physical and application. The physical difference is that Token Ring pretty much uses coax cable as its medium while FDDI conspicuously uses fiber. From an application standpoint, Token Ring is short distance (coax has a maximum attenuation distance of 500 meters) while FDDI can traverse far greater distances while attaining greater throughput. As a result, FDDI would be much more scalable, supportive of many more users, and primarily used in large geographically-demanding environments but pricey; on the other hand, token ring would be for less scalable environments but cheaper.

Another non-functional difference would be noise immunizations. FDDI is inherently immune to most interferences that coax implementations would be heir to. Fluorescent lighting, various frequencies, and other causes of noise to fiber would not affect it in the same adverse manner that would apply to coax.

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standard for data transmission in a local area network that can extend in range up to 200 kilometers (124 miles). Although FDDI logical topology is a token ring network, it does not use the IEEE 802.5 token ring protocol as its basis; instead, its protocol is derived from the IEEE 802.4 token bus timed token protocol. In addition to covering large geographical areas, FDDI local area networks can support thousands of users. As a standard underlying medium it uses optical fiber, although it can use copper cable, in which case it may be refer to as CDDI. FDDI uses a dual-attached, counter-rotating token ring topology.

FDDI was considered an attractive campus backbone technology in the early to mid 1990s, but FDDI has since been effectively obsoleted by fast Ethernet and, since 1998, by Gigabit Ethernet due to their speed, lower cost, and ubiquity.

FDDI, as a product of American National Standards Institute X3T9.5 (now X3T12), conforms to the Open Systems Interconnection (OSI) model of functional layering of LANs using other protocols. FDDI-II, a version of FDDI, adds the capability to add circuit-switched service to the network so that it can also handle voice and video signals. Work has started to connect FDDI networks to the developing Synchronous Optical Network SONET.

A FDDI network contains two token rings, one for possible backup in case the primary ring fails. The primary ring offers up to 100 Mbit/s capacity. When a network has no requirement for the secondary ring to do backup, it can also carry data, extending capacity to 200 Mbit/s. The single ring can extend the maximum distance; a dual ring can extend 100 km (62 miles). FDDI has a larger maximum-frame size than standard 100 Mbit/s Ethernet, allowing better throughput.

Designers normally construct FDDI rings in the form of a "dual ring of trees" (see network topology). A small number of devices (typically infrastructure devices such as routers and concentrators rather than host computers) connect to both rings - hence the term "dual-attached". Host computers then connect as single-attached devices to the routers or concentrators. The dual ring in its most degenerate form simply collapses into a single device. Typically, a computer-room contains the whole dual ring, although some implementations have deployed FDDI as a Metropolitan area network

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Fiber distributed data interface used in lan.

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Topology: physical ring of trees, logical ring

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Fiber distributed data interface (FDDI), which is an optical data communication standard used for long distance networks provides communication with fiber optic lines up to 200 kilometers at a speed of 100 megabit per second (Mbps).

It should be noted that relatively recently, a related copper specification, called Copper Distributed Data Interface (CDDI) has emerged to provide 100-Mbps service over copper. CDDI is the implementation of FDDI protocols over twisted-pair copper wire.

FDDI uses a dual-ring architecture with traffic on each ring flowing in opposite directions (calledcounter-rotating). The dual-rings consist of a primary and a secondary ring. During normal operation, the primary ring is used for data transmission, and the secondary ring remains idle and available for backup. The primary purpose of the dual rings, as will be discussed in detail later in this chapter, is to provide superior reliability and robustness. FDDI was later extended to FDDI-2 for long distance voice and multimedia communication.

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The abbreviation SAC stands for Single Attachment Concentrator, it is a concentrator that offers one attachment to the FDDI network, or a single-longitudinal mode laser

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Token Ring (IEEE 802.5)

FDDI (Fiber Distributed Data Interface)

Actually came across this as I was checking my answer for a Networking final.

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The commonly used fiber optic connector is

FC, LC, LT, SC, MTRJ, MU FDDI - ESCON Fiber optic connector and so on.

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Sheep leather is obtained from hide to in the form of skin from a special type of tanning. this leather is very soft and fine touch and this leather is different color and different grains.

Nitesh Rajput

Fddi, Chennai

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token ring uses a physical star and a logical ring ,while FDDI uses a physical star/ring and a logical ring.

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Token Ring

  • 1 Token on Network
  • 4 mbps or 16 mbps
  • 1 Ring
  • STP or UTP

FDDI

  • Multiple Tokens
  • 100 mbps
  • distance 100km
  • Fiber used in most implementations
  • Dual Ring

Internetworking with Cisco and Microsoft Technologies, pg. 237

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William E Burr has written:

'Planning for the fiber distributed data interface (FDDI)' -- subject(s): Planning, Fiber Distributed Data Interface (Computer network standard), Local area networks (Computer networks)

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Fiber Distributed Data Interface

It's a local area network technology that uses Fiber cable. It can support thousands of users so it's ideal for very large local area networks.

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IEEE 802.6 is a standard governed by the ANSI for Metropolitan Area Networks (MAN). It is an improvement of an older standard (also created by ANSI) which used the Fiber distributed data interface (FDDI) network structure. The FDDI-based standard failed due to its expensive implementation and lack of compatibility with current LAN standards. The IEEE 802.6 standard uses the Distributed Queue Dual Bus (DQDB) network form. This form supports 150 Mbit/s transfer rates. It consists of two unconnected unidirectional buses. DQDB is rated for a maximum of 160 km before significant signal degradation over fiberoptic cable with an optical wavelength of 1310 nm.

This standard has also failed, mostly due to the same reasons that the FDDI standard failed. Most MANs now use Synchronous Optical Network (SONET) or Asynchronous Transfer Mode (ATM) network designs, with recent designs using native Ethernet or MPLS.

Retrieved from "http://en.wikipedia.org/wiki/IEEE_802.6"

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It actually depends on the type of fiber optic connector. LC connectors, ST connectors, SC connectors, FC, MPO etc. there are many varieties. So if you want to adopt fiber optic connector which is cost friendly and popular as well, ST connectors are good for you. If your need small size fiber optic connector LC connectors are good which is approximately half the size of an ST connector.

americancableassemblies. com/fiber-optic-cables/tactical-fiber-reels/

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I) Packet Switching

II) Frame relay

iii) Fiber Disturbed Data Interference (FDDI)

iv) Asynchronous Transfer Mode (ATM)

v) Switched Hub Technology

vi) Synchronous Optical Network (SONET)

T-carrier system

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FDDI is a broad topic but if we want to describe in short then :

FDDI is a token ring network in which fiber optics cable is used as channel. there are three condition to design such a network-

1) there is a pair of fiber channel should passes to all the stations i.e. each host should have a pair of fiber optics cable(but should connected to only from one)

2)both channel should use same token

3)routing direction of both channel should be different.

the advantage of above three condition that if channel break down somewhere then we need to just short both channel and it will act as a single token ring channel.

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For a local area network (LAN), CDDI (Copper Distributed Data Interface) is a standard for data transmission based on FDDI (Fiber Distributed Data Interface) that uses shielded twisted-pair (STP) or unshielded twisted pair (UTP) copper wire instead of fiber optic lines. CDDI supports a dual-ring capacity of 200 Mbps. CDDI's maximum distance is up to 200 meters, which is much shorter than FDDI. CDDI is defined by the American National Standards Committee X3-T9.5 and conforms to the Open Systems Interconnection (OSI) model of functional layering. CDDI is officially named the Twisted-Pair Physical Medium Dependent (TP-PMD) standard and is also referred to as Twisted Pair Distributed Data Interface (TP-DDI).

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Data is transmitted on a network in pieces called packets, datagrams, or frames. Specifically, the frame is the header and trailer surrounding the data. The entire header, trailer, and data is called the packet or datagram. A token is a small packet used on Token Ring or FDDI networks. The token is passed from node to node to indicate to the node that data can be sent on the network.

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