That is, sender sends at a speed on which the receiver can process and accept the data. Data link controlmultiple choice questions and answers. It can carry a network data packet from protocols defined by the internet, osi, xerox, decnet, appletalk, novel ipcp ip control protocol configures the link used to carry ip packets in the internet dr. 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 a forouzan. A data link control protocol developed by digital equipment corporation. Data link layer protocols the data link layer provides service to the network layer above it.
Second layer of the osi reference model data link layer or the ieee 802 reference model which divides data link layer into logical link control and medium access control layer. Flow control regulates speed of delivery and so that a fast sender does not drown a slow receiver. Data link control presentation communications protocols. Mcq questions and answers on data communication and computer networks or multiple choice questions with answers on data communication and networks from chapter data link protocol. This chapter examines the structure of a frame, the data link layer flow control schemes, and two of the protocols defined for this layer, namely the high. Data link control in data communication iosr journals. Nneettwwoorrkk ccoonnttrrooll pprroottooccooll nnccpp ppp is a multiplenetwork layer protocol. This code may be used on lots of platforms easily as desired. These quiz objective questions are helpful for examinations nielit.
Data link control data link control, a function of the data link layer of the. We learn that the basic service of the data link layer is to move a. Mcq questions and answers on data communication and computer networks protocols or multiple choice questions with answers on data communication and networks from chapter data link layer. The data link layer is responsible for organizing data in frames and for detecting errors that occur in a frame. The frame type hierarchy for highlevel data link control hdlc protocols is shown in figure. Dlc also is an abbreviation for digital loop carrier. Data communications and computer networks pdf vssut dccn pdf vssut of total complete notes please. Establish transmission schedules statically or dynamically. Need layer of logic above physical to manage exchange of data over a link. It is responsible for controlling the ppp links for ppp suite protocols complete operation. Data communications and computer networks pdf vssut. So data link control provides a communication service to the network layer that transmits frames and makes use of a bit transport service provided by the physical layer.
Data link control protocols when sending data, to achieve control, a layer of logic is added above the physical layer data link control or a data link control protocol. Dlc is concerned with blocks of bits, called frames, and it assumes services of physical layer and provides layer of logic above it. Binwag chapter 23 electronic communications sytems, fifth editon by. Data link layer can be configured to provide several types of services. Data link layer design issues services framing error control flow control. Example data link layer protocols high level data link control hdlc i provides frame formats, link establishment procedures, title. Dlc data link control is the service provided by thedata link layer of function defined in the open systems interconnection osi model for network communication. Hdlc, multiplexing reliable services and data link.
Pdf implementation of data link control protocols in. Pdf implementation of data link control protocols in wired network. Flow control flow control in the data link layer is achieved through set of procedures that control how much data the sender can send before overwhelming the receiver. Transport protocol from sdlc synchronous data link control to. Chapter 11 data link protocols asynchronous protocols synchronous protocols. The 5g radio protocols consist of a user plane up and a control plane cp. Imaging systems from multiple vendors and a wide range of vintages coexist in the same department and employ data communication protocols that are not fully standardized or implemented making. Almost all linklayer protocols encapsulate each networklayer datagram within a link layer frame before transmission onto the link. The data link layer is responsible for providing reliable data transfer across one physical link or telecommunications path within the network. Data link control presentation free download as powerpoint presentation. Link control protocol lcp is the core component of pointtopoint protocol ppp network communication. View notes data link control and protocols from itec 000 at eastern mediterranean university.
The network layer is interested in getting messages to the corresponding network layer module on an adjacent machine. Two types of mechanism can be deployed in the scenario to control the flow. Data link protocols can be broadly divided into two categories, depending on whether the transmission channel is noiseless or noisy. Data link control protocols pointtopoint protocol 201104 eitf25 internet. Implementation of data link control protocols in wired network. Data link protocol multiple choice questions and answers. Data link layer responsibilities of data link layer. When a data frame layer2 data is sent from one host to another over a single medium, it is required that the sender and receiver should work at the same speed. The up is located between the ip layer and the physical layer. For example, connectionoriented and connectionless. The remote network layer peer should receive the identical message generated by the sender e. In a gobackn arq, if the window size is 63, what is the range of.
The data link layer software checks to see if this is the frame expected, and if so, gives the packet contained in the payload field to the routing software. When dlc is used, the transmission system between two communicating systems is referred as a data link. The data link layer is an interface between the network and physical layer. It is further subdivided into two protocol sublayers. The routing software then chooses the appropriate outgoing line and passes the packet back down to the data link layer software, which then transmits it. Hdlc is the software implementation of high level data link control hdlc standard. Pdf data link layer is the protocol layer which transfers data between connected networks. Ppt chapter 11 data link control powerpoint presentation. This data communication and networking data link control multiple choice mcq based questions and answers pdf cover the below lists of topics. Data link control and protocols data link control and. In the osi networking model, data link control dlc is the service provided by the data link layer. Detection and correction flow control stop and wait, go back n, selective repeat. Contents types of services provided by dll protocols 4 flow control functions 7 flow. Network interface cards have a dlc address that identifies each card.
Control information can be inserted as bits depending on the information to be contained in the frame bitoriented protocol can pack more information into shorter frames. Data communications and networking 5th edition by forouzan. A link isthe communication channels that connect two adjacent hosts or routers. Data link control dlc protocols the purpose of a mac protocol is to let competing computers access a shared medium so that a computer can transmit a data frame to another computer possibly without collision. Data link layer silvia giordano ica, epfl the data link layeris responsible for transferring a datagram across an individual link. Various medium access control protocols in data link layer computer networks duration.
It contains multiple choice questions and answers about x. Chen, in computer and information security handbook third edition, 2017. Computer networking and management lesson 5 the data. Data link control protocols i physical layer concentrates on sending signals over transmission link. Data mining, data mining is the process of discovering potentially useful, interesting, and previously unknown patterns from a large collection of data. Computer networking and management lesson 5 the data link layer. Datalink layer is responsible for implementation of pointtopoint flow and error control mechanism. Like physical layer protocols, data link layer protocols are classified as lan protocols, wan protocols, or protocols that can be used for both lans and wans. A data link control is a service that ensures reliable network data communication by managing frame error detection and flow control. In addition, the data link layer enables the network layer to control the.
Data link control dlc protocols the purpose of a mac protocol is to let competing computers access a shared medium so that a computer can transmit a data. Powerpoint ppt presentation free to view chapter 5 peertopeer protocols and data link layer data link operates over wirelike, directlyconnected systems. It is a fully optimized ccode and it utilizes a state table based, efficient algorithm. Various flow control protocols in data link layer stop. Network associates guide to communications protocols tcpip presentation services. Lite nds netware directory services rpl remote program load ncp netware core protocol ipx wan 2 path dlsw control data link switching ssp switch to switch protocol isis intermediate system to. Stop and wait this flow control mechanism forces the sender after transmitting a data frame to stop and wait until the acknowledgement of the data frame sent is received. Chapter 11 data link control dlc chapter 12 media access control mac chapter wired lans. Wireless link between lan hub and mobile data terminal equipped with antenna. Examples of link layer protocols include ethernet, token ring, fddi, and ppp.
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