Frame relay and atm from book the data communications and networking 4th edition by behrouz a. Frame relay merupakan teknologi yang muncul diawal tahun 1990 dan dikembangkan untuk menggantikan teknologi x. In this same way, smds can carry frame relay, or atm, or x. It includes a bibliography and a set of www sites with information on frame relay networks. Although we dont see much native atm or frame relay on our network any longer, we can really find the best parts of both of those contained in our mpls wide area networks. Atm vs frame relaydifference between atm and frame relay.
Basic concepts of frame relay explained in easy language. This page compares atm asynchronous transfer mode vs frame relay and mention. Frame relay does not define any such handshakes requires a handshake slower than frame relay the simplicity of frame relay makes it faster and more efficient, because of it is, a data link layer protocol it is a high speed switching technology, supports multimedia, cost effective in x. Thus, from the perspective of ip which is also an endtoend wan technology, x. Free ccna network fundamentals day 1 200125 free cisco video training networking 2018 duration. Because ip is one of the protocols being highlighted in this book, we have put x. Specifies the layer 2 tunneling protocol l2tp ipsec extensions, which allows ip, ipx, or netbeui traffic to be encrypted and then sent over any medium that supports pointtopoint ppp point to point protocol rfc1661 datagram delivery, such as ip, x.
The isdn service you get from the phone company might at some point run on top of or through a frame relay network. Scribd is the worlds largest social reading and publishing site. Frame relay is an industrystandard, switched data link layer protocol that handles multiple virtual circuits using highlevel data link control hdlc encapsulation between connected devices. Pse dte are usually terminals dce devices are communication devices such as modems and packet switches and pse as generally located in carriers. Frame relay is one of the most popular wan service deployed over the past decade. The frame relay is the packet switched network as well as it may compare with the x. Frame relay and atm mcq multiple choice based short questions and answers,it cover the below lists of topic, all the multiple choice question and answer mcqs have been compiled from the books of data communication and networking by the well known author behrouz forouzan. The following figure illustrates a frame relay frame ansi t1. Frame relay frame relay is a highperformance wan protocol that operates at the physical and data link layers of the osi reference model.
This page and associated content may be updated frequently. The service, once widely available and implemented, is in the process of being discontinued by major internet service. There are also proprietary atm multiplexers available which handle voice and data traffic. An atm backbone is shown, because it is a common method of interconnecting fr switches.
Packets may not be delivered in the same sequence as that at the sending end. Examples of wan technologies and protocols include frame relay, atm. Dsl have higher download speeds, but satellite systems are about ten times faster than. The basic frame protocol, which is used in the frame relay is hdlc and the typical speed is higher than the x. Fr network employs switches that support automatic routing of pvc around. Frame relay is a widearea network with the following features. Internet protocol or ethernet or frame relay that use variable sized packets and frames. So, for example, a company may purchase a cir that is half of the 1. Fr makes use of physical circuit by statistically multiplexing multiple pvcs over a single physical circuit higher network availability. Note that the frame relay operates only on frames because the. Frame relay and atm part 3 from the book, data communications and networking 4th edition by behrouz a. Frame relay provides the statistical multiplexing interface of x. Based on the various performance metrics, the comparative study demonstrates that atm has less delay compared to the x. This package provides the background for the next training on the isdn network, on the wide area networks and on internet.
Frame relay and atm are two wellknown technologies. Frame relay is a packetswitching telecommunication service designed for costefficient data transmission for intermittent traffic between local area networks lans and between endpoints in wide area networks wans. Pal, department of computer science engineering,iit kharagpur. Originally designed for transport across integrated services digital network isdn infrastructure, it may be used today in the context of many other network interfaces. In many cases, frame relay is more efficient than x. Atm, certification, comptia, frame relay, jk0023, mpls, n6, network. In the first layer physical another overhead is added, which includes the header and the trailer. Frame relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.
January 17, 2020 below are the answers key for the multiple choice questions quiz of set 1 mcqs of virtualcircuit networks. Frame relay frame relay is a wide area network with the following features. They are considered as the variations of the legacy. In this section of data communication and networking virtualcircuit networks. Even though several advanced technologies such as vpn, atm are available today, frame relay still rocks and will be in near future due to its features, benefits and lower cost in comparison with other point to point wan services. Presently, it is used for networks for atms and credit card verification. It was originally designed for use in the 1970s and became very popular in 1980s. Fr offers reduction of physical local loops over private line network as frame uses a virtual circuit for each new connection higher circuit utilization. Frame relay complements and provides a midrange service between isdn, which offers bandwidth at 128 kbps, and asynchronous transfer mode atm, which operates in somewhat similar fashion to frame relay but at speeds of 155. This illustration depicts the customer and service provider sides of a frame relay network.
Frame relay is a virtualcircuit widearea network that was designed in response to demands for a new. Frame relay vs cell relay atm frame relay is defined up to 2 mbps. This is the online practice quiz in virtualcircuit networks. It was originally defined by the international telegraph and telephone consultative committee ccitt, now itut in a series of drafts and finalized in a publication known as the orange book in 1976 this makes it one of the oldest packetswitching communication protocols available. The bandwidth for frame relay is provided in the form of a commited information rate cir, generally a percentage of a t1 line. Frame relay works at the datalink layer of the osi model and provides data transfer rates from 56 kbps to 1. In my posts, i use the term frame to represent a data link layer unit of information, and the term packet to represent a network layer unit of information.
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