Computer Networks
... Computers can “manipulate” information Networks create “access” to information ...
... Computers can “manipulate” information Networks create “access” to information ...
15-441: Networking Virtual Circuits, ATM, MPLS Peter Steenkiste Carnegie Mellon University
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
Internet Quality of Service
... Integrated Services Differentiated Services Multi Protocol Label Switching ...
... Integrated Services Differentiated Services Multi Protocol Label Switching ...
ppt - Carnegie Mellon School of Computer Science
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
ATM
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
... » Use full destination addresses for forwarding packets » Can send data right away: no need to establish a connection first » Switches are stateless: easier to recover from failures » Adding QoS is hard » Traffic engineering is hard: too many packets! ...
TNO Presentation
... • In others, a network is differentiated from an internetwork based on how the devices are connected together: • where a network usually refers to a collection of machines that are linked at layer two of the OSI Reference Model • using technologies like Ethernet or Token Ring • and interconnection d ...
... • In others, a network is differentiated from an internetwork based on how the devices are connected together: • where a network usually refers to a collection of machines that are linked at layer two of the OSI Reference Model • using technologies like Ethernet or Token Ring • and interconnection d ...
20061019-internet2intro
... • Ideal platform for network research – ability to support highly experimental projects along with production based services • Internet2 Observatory will be expanded to include • Data collection at all layers of the network, with datasets made available to network researchers • Support for colocatio ...
... • Ideal platform for network research – ability to support highly experimental projects along with production based services • Internet2 Observatory will be expanded to include • Data collection at all layers of the network, with datasets made available to network researchers • Support for colocatio ...
Features of the Internet history
... demonstration of an ARPANET network, connecting 40 different computers, at the International Computer Communication Conference in October 1972, making the network widely known for the first time to technical people from around the world [18]. Organizing the demonstration was a major undertaking, to ...
... demonstration of an ARPANET network, connecting 40 different computers, at the International Computer Communication Conference in October 1972, making the network widely known for the first time to technical people from around the world [18]. Organizing the demonstration was a major undertaking, to ...
Network services - Internet Network Architectures
... Tilman Wolf, “Service-centric end-to-end abstractions in next-generation networks,” in Proc. of Fifteenth IEEE International Conference on Computer Communications and Networks (ICCCN), Arlington, VA, Oct. 2006, pp. 79-86. Sivakumar Ganapathy and Tilman Wolf, “Design of a network service architecture ...
... Tilman Wolf, “Service-centric end-to-end abstractions in next-generation networks,” in Proc. of Fifteenth IEEE International Conference on Computer Communications and Networks (ICCCN), Arlington, VA, Oct. 2006, pp. 79-86. Sivakumar Ganapathy and Tilman Wolf, “Design of a network service architecture ...
Mesh Slicing: Improving Robustness of A Mesh Network via Multiple
... rate becomes 3.8%. In this way, packet loss decreases significantly. The only down-side is that this scheme must consume more wireless channel resources. However, although this naive method appears viable theoretically, it does not always work well in reality. For example, a path with high packet lo ...
... rate becomes 3.8%. In this way, packet loss decreases significantly. The only down-side is that this scheme must consume more wireless channel resources. However, although this naive method appears viable theoretically, it does not always work well in reality. For example, a path with high packet lo ...
4th Edition: Chapter 1
... If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our sl ...
... If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our sl ...
Finance Evolution
... – Paths are recalculated periodically to ensure low latency path – Once optimal path is available, traffic is re-routed (make before break) to this path – As this path could be significantly shorter (2 – 10ms), there will be out of order packets that may impact some hosts ...
... – Paths are recalculated periodically to ensure low latency path – Once optimal path is available, traffic is re-routed (make before break) to this path – As this path could be significantly shorter (2 – 10ms), there will be out of order packets that may impact some hosts ...
Medium Access Control (MAC)
... The final field in an Ethernet MAC frame is called a Cyclic Redundancy Check (sometimes also known as a Frame Check Sequence). A 32-bit CRC provides error detection in the case where line errors (or transmission collisions in Ethernet) result in corruption of the MAC frame. Any frame with an invalid ...
... The final field in an Ethernet MAC frame is called a Cyclic Redundancy Check (sometimes also known as a Frame Check Sequence). A 32-bit CRC provides error detection in the case where line errors (or transmission collisions in Ethernet) result in corruption of the MAC frame. Any frame with an invalid ...
No Slide Title
... it retransmits the token. A token-passing scheme is used by the IBM and Apollo systems. Message slots. A number of fixed-length message slots continuously circulate in the system (usually a ring structure). Since a slot can contain only fixed-sized messages, a single logical message may have to be b ...
... it retransmits the token. A token-passing scheme is used by the IBM and Apollo systems. Message slots. A number of fixed-length message slots continuously circulate in the system (usually a ring structure). Since a slot can contain only fixed-sized messages, a single logical message may have to be b ...
network
... cover large geographic area (tolerate latency) support large numbers of hosts (scalable bandwidth) ...
... cover large geographic area (tolerate latency) support large numbers of hosts (scalable bandwidth) ...
lecture 1 – Internet Layer IP, ARP,ICMP and IGMP
... The first six characters represent the manufacturer and are unique to the network card’s manufacturer The last six characters form a unique serial number that the card’s manufacturer has assigned to it Note: For all TCP/IP communication to occur, the sender/builder of the packet must know the ...
... The first six characters represent the manufacturer and are unique to the network card’s manufacturer The last six characters form a unique serial number that the card’s manufacturer has assigned to it Note: For all TCP/IP communication to occur, the sender/builder of the packet must know the ...
Unit 5 - WordPress.com
... controlled in such a way as to setup a communication path between any two distant points. A switching center of a telephone network comprising a switching network and its control and support equipment is called a central office. In large networks there might be multiple paths linking sender and rece ...
... controlled in such a way as to setup a communication path between any two distant points. A switching center of a telephone network comprising a switching network and its control and support equipment is called a central office. In large networks there might be multiple paths linking sender and rece ...
Wanted: Systems abstractions for SDN
... network configuration as a graph of modular elements that perform specific packet processing functions; packets flow along the edges of the graph. We believe that Click can aptly satisfy our first requirement. Unfortunately, Click as originally proposed does not meet the second requirement: Click’s ...
... network configuration as a graph of modular elements that perform specific packet processing functions; packets flow along the edges of the graph. We believe that Click can aptly satisfy our first requirement. Unfortunately, Click as originally proposed does not meet the second requirement: Click’s ...
Improving the packet send-time accuracy in embedded devices
... The packet sending timestamps captured by tcpdump do not match with the DAG ones which the software requires to send packets close to/higher than the line rate. tcpdump reports a timestamp before the packets are actually sent onto the wire. ...
... The packet sending timestamps captured by tcpdump do not match with the DAG ones which the software requires to send packets close to/higher than the line rate. tcpdump reports a timestamp before the packets are actually sent onto the wire. ...
Wide Area Network - Wiwin Sulistyo WebBlog
... If the bandwidth becomes too congested, Frame Relay will drop any frames that it cannot handle. Once the available bandwidth is at a minimum, the source or destination can be notified to slow the transmissions to avoid over-utilization of the bandwidth, which will avoid packets being dropped due to ...
... If the bandwidth becomes too congested, Frame Relay will drop any frames that it cannot handle. Once the available bandwidth is at a minimum, the source or destination can be notified to slow the transmissions to avoid over-utilization of the bandwidth, which will avoid packets being dropped due to ...
Practical Fuzzy-CAC Realization for Effective Traffic Engineering in
... network conditions as well as the decision firing threshold online modification. The curiously interesting appears the possibility of development of multiagent traffic management system based on fuzzy agents, to provide common knowledge base for certain network clusters and provide the interactivity ...
... network conditions as well as the decision firing threshold online modification. The curiously interesting appears the possibility of development of multiagent traffic management system based on fuzzy agents, to provide common knowledge base for certain network clusters and provide the interactivity ...
ChouTutorial04 - Microsoft Research
... Packet loss, node & link failures w/ unknown locations Local encoding vectors are time-varying & random ...
... Packet loss, node & link failures w/ unknown locations Local encoding vectors are time-varying & random ...
Circuit Switching
... Time Division Switching • Both voice and data can be transmitted via digital signals. • All modern circuit switches use digital time-division techniques for establishing and maintaining circuits. – Synchronous TDM allows multiple low-speed bit streams to share a highspeed line. – A set of inputs is ...
... Time Division Switching • Both voice and data can be transmitted via digital signals. • All modern circuit switches use digital time-division techniques for establishing and maintaining circuits. – Synchronous TDM allows multiple low-speed bit streams to share a highspeed line. – A set of inputs is ...
NoC theory part II: Network adapters
... Logically independent resource allocation (avoid contention) Division of link bandwidth!! © System-on-Chip Group, CSE-IMM, DTU ...
... Logically independent resource allocation (avoid contention) Division of link bandwidth!! © System-on-Chip Group, CSE-IMM, DTU ...
Labeled Optical Burst Switching and IP/WDM Integration Chunming Qiao 1
... • carriers’ and venders’ point of view: – expenditure rate higher than revenue growth – longer term, equipment investment cannot keep up with the traffic explosion – need BW-efficient solutions to be competitive ...
... • carriers’ and venders’ point of view: – expenditure rate higher than revenue growth – longer term, equipment investment cannot keep up with the traffic explosion – need BW-efficient solutions to be competitive ...
Packet switching
Packet switching is a digital networking communications method that groups all transmitted data into suitably sized blocks, called packets, which are transmitted via a medium that may be shared by multiple simultaneous communication sessions. Packet switching increases network efficiency, robustness and enables technological convergence of many applications operating on the same network.Packets are composed of a header and payload. Information in the header is used by networking hardware to direct the packet to its destination where the payload is extracted and used by application software.Starting in the late 1950s, American computer scientist Paul Baran developed the concept Distributed Adaptive Message Block Switching with the goal to provide a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the US Department of Defense. This concept contrasted and contradicted the heretofore established principles of pre-allocation of network bandwidth, largely fortified by the development of telecommunications in the Bell System. The new concept found little resonance among network implementers until the independent work of Donald Davies at the National Physical Laboratory (United Kingdom) (NPL) in the late 1960s. Davies is credited with coining the modern name packet switching and inspiring numerous packet switching networks in Europe in the decade following, including the incorporation of the concept in the early ARPANET in the United States.