Computer networking layers pdf

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Computer networking layers pdf
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The College of Engineering at the University of Utah
filexlib. An Introduction to Computer Networksis a free and open general-purpose computer-networking textbook, complete with diagrams and exercises.It covers the LAN, internetworking and transport layers, focusing primarily on TCP/IP. Particular attention is paid to congestion; other special topics include queuing, real-time traffic, network management, security and the ns simulator.
This layer conveys a packet across different networks to any addressable destination. This is split into two units, the first about IP, and the second about routing; it is only split to allow more time to cover it. The topics are: • IP addressing, • packet format, • packet forwarding • addressing on a LAN (ARP).
Computer Networks – A Tanenbaum – 5th edition.pdf. Computer Networks – A Tanenbaum – 5th edition.pdf. Sign In
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The Network Layer is the third layer of the OSI model. It handles the service requests from the transport layer and further forwards the service request to the data link layer. The network layer translates the logical addresses into physical addresses. It determines the route from the source to the destination and also manages the traffic
Purdue University
Some well-known protocols for the data link layer include High-level Data Link Control (HDLC), LAN drivers and access methods such as Ethernet and Token Ring, and the LAP-D protocol in ISDN networks. Layer 3: Network Layer While the data link layer deals with the method in which the physical layer is used to transfer data, the network layer
Internet Router Architecture 8 Router – 3-layer (physical, data-link, network) device, with 3 key functions: • run routing algorithms/protocols (RIP, OSPF, BGP) •forward/switch IP packets from incoming to proper outgoing links •manage congestion Router Architecture •input ports / interfaces (see pp. 10) •interconnection (switching) fabric (see pp. 11)
Description of Layers •Physical Layer -Handles the transmission of raw bits over a communication link •Data Link Layer -Collects a stream of bits into a larger aggregate called a frame -Network adaptor along with device driver in OS implement the protocol in this layer -Frames are actually delivered to hosts •Network Layer
The metropolitan area network is a large computer network that exp ands a Metropolitan area or campus. Its geographic area between a WAN and LAN. its expand rou nd 50km devices used are modem and wire/cable. Fig. 1.4 Metropolitan Area network Characteristics of MAN 1) Its covers the towns and cities (50km)
The metropolitan area network is a large computer network that exp ands a Metropolitan area or campus. Its geographic area between a WAN and LAN. its expand rou nd 50km devices used are modem and wire/cable. Fig. 1.4 Metropolitan Area network Characteristics of MAN 1) Its covers the towns and cities (50km)
Physical layer: ensures a safe and efficient travel of data; consists of electronic circuits for data transmission etc. Data link layer: in charge of data encapsulation under the form of packets and their interpretation at the physical layer. Network layer: in charge of packets transmission from a source A to a destination B. 10] Network Layer = network layer is responsible for host-to-host communication and routing the packet through possible routes. 11] Transport Layer = The transport layer at the source host gets the message from the application layer, encapsulates it in a transport layer packet (called a segment or a user datagram) and sends it, to

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