Data link protocols powerpoint presentation, computer. Previous slides by markus hidell, bjorn knutsson and. Jan 22, 2016 satu ciri utama yang terpeting ada pada data link layer ini adalah bahwa data link layer merupakan salah satu lapisan yang secara fisik memiliki alamat tersendiri atau address yang sudah dikodekan secara langsung ke dalam sebuah network card atau kartu jaringan ketika kartu jaringan tersebut pertama kali dibuat. The mac sub layer data link layer provides packet sendreceive service to network layer 116. Using telephone and cable networks for data transmission data link layer. It starts with defining the concept of links and nodes. Logical link control llc and media access control mac. In this lesson we examine the data link layer its services, the principles underlying its operation, and a number of important data link layer protocols. The data link layer s first sublayer is the media access control mac layer. Your ip address is the source, and your friends is the destination.
Mar 06, 2017 this feature is not available right now. Scribd is the worlds largest social reading and publishing site. The data link layer is connected to the media in one of two ways. This layer is one of the most complicated layers and has complex. Data link physical the seven layers of the osi model cont. Highlevel data link control bitoriented protocol derived from ibm s sna data link protocol sdlc synchronous data link control. Ppt data link layer powerpoint presentation free to download id. As a frame is being built at the data link layer and that frame is destined to leave its home network for some other far off network as a packet, something must tell the upper layers, above the frame level, what protocol will be used to carry this packet far, far away.
Ppt data link layer powerpoint presentation, free download id. The three major types of services offered by data link layer are. Data link layer silvia giordano ica, epfl the datalink layeris responsible for transferring a datagram across an individual link. Application presentation session transport network data link physical application presentation session transport network data link physical middle layer higher layer application to application application to application application to application process to process lower layer hop to hop switch hop to hop physical medium hub and repeater router. Download cbse notes, neet notes, engineering notes, mba notes and a lot more from our website and app. You can see some data link protocols powerpoint presentation, computer network sample questions with examples at the bottom of this page. Layer 3 also determines the best paths for data delivery. Data link layer is second layer of osi layered model. Computer networking and management lesson 5 the data link layer. Data link layer transmission control protocol computer. Content osi model data link layer sub layers functions of data link layer devices and. Regulating the flow of data so that slow receivers are not swamped by fast senders 4 for this, the data link layer takes the packets it gets from the network layer and encapsulates them into frames for transmission.
The physical layer provides only a raw bitstream service between computers. Physical layer and its limitations issues with shared media. Insert dle before accidental dle in data remove stuffed character at destination fig 34 8 the ohio state university raj jain bit stuffing delimit with special bit pattern bit flags stuff bits if pattern appears in data remove stuffed bits at destination fig 35. Were making these slides freely available to all faculty, students, readers. Ppt osi model powerpoint presentation free to view. Chapter 9 introduction to datalink layer ppt download. Framing1framing is the process of breaking the bit stream up intodiscrete frames.
It responds to service requests from the network layer above it and issues service requests to the physical layer below it. The data link layer accepts messages from the network layer and controls the hardware that actually transmits them. Aug 01, 20 download data link layer in lan presentation transcript. Data link layer design issues providing a welldefined service interface to the network layer. Data link layer 2 data link layer provides a welldefined service interface to the network layer. Data link layer 6 host a host b layer 4 node 2 node 1 layer 4 layer 2 frame data link layer model assume host has infinite supply of messages. The most popular multipoint data link protocol is ethernet. Nov 29, 2018 the data link layer in the osi open system interconnections model, is in between the physical layer and the network layer. This layer is one of the most complicated layers and has complex functionalities and liabilities. Services provided to the network layer framing error control flow control. The data link layer in the osi open system interconnections model, is in between the physical layer and the network layer. Tcpip combines the osi data link and physical layers into one layer.
Data and computer networks data link layer 1 to a group of data bits add a single. When you message your friend, this layer assigns source and destination ip addresses to the data segments. The main functions and the design issues of this layer are. The network layer is interested in getting messages to the corresponding network layer module on an adjacent machine. Data link layer this layer provides reliable transmission of a packet by using the services of the physical layer which transmits bits over the medium in an unreliable fashion. Data link protocols powerpoint presentation, computer network. Chapter 5 peertopeer protocols and data link layer data link operates over wirelike, directlyconnected systems. Provides a welldefined service interface to the network layer. The data link layer is responsible for moving frames from one hop node to the next. Typically networks arent built on the osi protocol, even though the osi model is used as a guide.
Ppt osi model powerpoint presentation free to download id. Examples of linklayer protocols include ethernet, token ring, fddi, and ppp. The physical layer must wait until this event is completed and the data link layer goes back to its sleeping state. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network or between nodes on the same local area network segment. But the actual path is network layer data link layer physical layer on source machine, then to physical media and thereafter physical layer data link layer network layer on destination machine. The data link layer or layer 2 is the second layer of the seven layer osi model of computer networking. Ppt data link layer powerpoint presentation free to. Allows the upper layers to access the media using framing. The section then lists and briefly describes the services provided by the datalink layer.
Determines how the bits of the physical layer are grouped into frames framing. The mac sub layer but, different media have different constraints about multiple nodes accessing the medium 118. Node constructs frame from a single packet message. The data link layer, or layer 2, is the second layer of the sevenlayer osi model of computer networking. Data link layer is the second layer in osi reference model and lies above the physical layer. Ppt osi model powerpoint presentation free to download. The remote network layer peer should receive the identical message generated by the sender e. The data link layers first sublayer is the media access control mac layer. Data link layer free download as powerpoint presentation. Forouzan, computer networks,4th edition, mcgrawhill ppt slides computer and information technology notes. Ppt the data link layer powerpoint presentation, free. The data link layer is used for the encoding, decoding and logical organization of data bits. This is the official web site of tcpdump, a powerful commandline packet analyzer. The data link layer provides the functional and procedural means to transfer data between network entities and.
Chapter 5 peertopeer protocols and data link layer chapter 5 peertopeer protocols and data link layer contain s by leongarcia and widjaja chapter 5 peertopeer protocols and data link layer part i. The protocols are developed in increasing complexity to help students understand the data link layer issues. The mac sub layer physical layer provides binary sendreceive to data link layer 117. This layer converts the raw transmission facility provided by the physical layer to a reliable and errorfree link. A node constructs a framefrom a single packet message. We have shown a vertical line to indicate the delay. Ppt the data link layer powerpoint presentation, free download.
Both the sender and receiver have to agree on the rules or protocols that govern how their data link layers will communicate with each other. Provides connectivity and path selection between two host systems routes data packets selects best path to deliver data the network layer prioritizes data known as quality of service qos. Download data link layer in lan presentation transcript. We learn that the basic service of the data link layer is to move a network layer datagram from one node host or router to an adjacent node. The issue that arises in the data link layer and most of the higher layers as well is how to keep a fast transmitter from drowning a slow receiver in data. Lapisan data link data link layer adalah lapisan kedua dari bawah dalam model osi, yang dapat melakukan konversi frameframe jaringan yang berisi data yang dikirimkan menjadi bitbit mentah agar dapat diproses oleh lapisan fisik.
Data link layer of osi reference model studytonight. Ppt on data link layer in lan powerpoint presentations. Some traffic regulation mechanism is often needed to let the transmitter know how much buffer space the receiver has at the moment. The data link layer transforms the logical communication channel. Ppt layer 2 data link layer powerpoint presentation. Breaking input data into frames typically a few hundred bytes and caring about the frame boundaries and the size of each frame. A link isthe communication channels that connect two adjacent hosts or routers. Nov 05, 2012 cisco ccna 01 chapter 07 data link layer. Ppt the 7 layer osi model powerpoint presentation free to. Framing in the data link layer separates a message from one source to a destination, or from other messages going from other sources to other destinations. Pengertian dan penjelasan data link layer the last notes. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network wan or between.
Data link layer protocols the data link layer provides service to the network layer above it. This ppt describes the data link layer in networking systems. Oct 16, 2005 the data link layer is the second layer in the osi open systems interconnection seven layer reference model. Data link layer 48 network layer 49 transport layer 51 session layer 53 presentation layer 54 application layer 55 summary of layer functions 56 3. Data link protocols powerpoint presentation, computer network summary and exercise are very important for perfect preparation. Protocols are developed in increasing complexity to help understand the data link layer issues. Examples of link layer protocols include ethernet, token ring, fddi, and ppp. Jan 12, 2009 the mac sub layer data link layer provides packet sendreceive service to network layer 116. The adobe flash plugin is needed to view this content. Summary of data link layer data link control deals with the design and procedures for communication between two adjacent nodes. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network wan or between nodes on the same local area network lan segment. The mac sub layer but, different media have different constraints. The data link layer, or layer 2, is the second layer of the seven layer osi model of computer networking.
Layer 1 involves media physical, wireless digital data bit streams that travel on media, slideshow 5925 by anikabrowning. Functions of the data link layer provide service interface to the network layer dealing with transmission errors regulating data flow slow receivers not swamped by fast senders. The data link layer provides data reliability and provides tools to establish, maintain, and release data link connections among the network nodes. Data link layer hides the details of underlying hardware and represents itself to upper layer as the medium to communicate. Checksum is automatically appended in the hardware. Jan 30, 2015 data link layer design issues providing a welldefined service interface to the network layer. Ddl prepares a frame for transport across the local media byencapsulating it with a header and trailer. Dcn datalink layer introduction data link layer is second layer of osi layered model. Data packets are framed and addressed by this layer, which has two sublayers. A free powerpoint ppt presentation displayed as a flash slide show on id. Data link layer 6 data link layer model assume the sending host has infinite supply of messages. This presentation covers the design issues of dll, error correction and detection techniques, sliding window protocols. Times new roman arial wingdings artsy data link layer data link layer design issues functions of the data link layer functions of the data link layer 2 services provided to network layer placement of dll types of services provided to the network layer unacknowledged connectionless service acknowledged connectionless service acknowledged. Data link layer silvia giordano ica, epfl the data link layeris responsible for transferring a datagram across an individual link.
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