P2P Lecture
... •Gnutella "Query" ask other peers if they have the file you desire A Query packet might ask, "Do you have any content that matches the string ‘Hey Jude"? • Peers check to see if they have matches & respond (if they have any matches) & send packet to connected peers • Continues for TTL (how many hops ...
... •Gnutella "Query" ask other peers if they have the file you desire A Query packet might ask, "Do you have any content that matches the string ‘Hey Jude"? • Peers check to see if they have matches & respond (if they have any matches) & send packet to connected peers • Continues for TTL (how many hops ...
non-cooperative forwarding in ad-hoc networks
... such a scenario is to provide incentives for collaboration among the participating entities. Forwarding packets of other nodes is an example of activity that requires such a collaboration. However, it may not be in interest of a node to always forward the requesting packets. At the same time, not fo ...
... such a scenario is to provide incentives for collaboration among the participating entities. Forwarding packets of other nodes is an example of activity that requires such a collaboration. However, it may not be in interest of a node to always forward the requesting packets. At the same time, not fo ...
Slide
... A site determines whether another message is currently being transmitted over that link. If two or more sites begin transmitting at exactly the same time, then they will register a CD and will stop transmitting ...
... A site determines whether another message is currently being transmitted over that link. If two or more sites begin transmitting at exactly the same time, then they will register a CD and will stop transmitting ...
Using PlanetLab for Network Research: Myths, Realities, and Best Practices 1
... community taught us lessons that may shape its continued evolution and may generalize beyond PlanetLab to other systems. First, users do not always search out “best practice” approaches: they expect the straightforward approach to work. Second, users rarely report failed attempts: we learned of the ...
... community taught us lessons that may shape its continued evolution and may generalize beyond PlanetLab to other systems. First, users do not always search out “best practice” approaches: they expect the straightforward approach to work. Second, users rarely report failed attempts: we learned of the ...
Optimizing Matrix Multiply - Dipartimento di Matematica
... • Bandwidth typically in Gigabytes (GB), i.e., 8* 220 bits • Effective bandwidth is usually lower than physical link bandwidth due to packet overhead. Routing and control ...
... • Bandwidth typically in Gigabytes (GB), i.e., 8* 220 bits • Effective bandwidth is usually lower than physical link bandwidth due to packet overhead. Routing and control ...
P2Poverview
... Nodes that have more connection bandwidth and are more available are designated as supernodes Each supernode acts as a mini-Napster hub, tracking the content (files) and IP addresses of its ...
... Nodes that have more connection bandwidth and are more available are designated as supernodes Each supernode acts as a mini-Napster hub, tracking the content (files) and IP addresses of its ...
ppt
... – Active UDP-based probing • Uniform random in [0,14] • O(n2) – 3-way probe • Both sides get RTT information • Store latency and loss-rate information in DB ...
... – Active UDP-based probing • Uniform random in [0,14] • O(n2) – 3-way probe • Both sides get RTT information • Store latency and loss-rate information in DB ...
Slide
... with prob. p: randomly selected node with prob. 1-p: copied target from selected ‘prototye node’ 2. Attaching to edges: : after adding new node, instead of selecting target node, select target edges and connect new node to end point of the edges. ...
... with prob. p: randomly selected node with prob. 1-p: copied target from selected ‘prototye node’ 2. Attaching to edges: : after adding new node, instead of selecting target node, select target edges and connect new node to end point of the edges. ...
Scalable Routing Strategies for Ad hoc Wireless Networks
... law enforcement (e.g., crowd control, search-and-rescue) and military (automated battle eld). Key characteristics of these systems are the large number of users, their mobility and the need to support multimedia communications. The last requirement stems from the fact that in mobile scenarios, human ...
... law enforcement (e.g., crowd control, search-and-rescue) and military (automated battle eld). Key characteristics of these systems are the large number of users, their mobility and the need to support multimedia communications. The last requirement stems from the fact that in mobile scenarios, human ...
Types of Routing Protocols
... => Potential routing protocol for the core of a network; used in large networks. => For neighbor relation to be established, both routers must send and receive Hello or Ack packets from each other, they must have the same AS #, and the same Metric K values. => Eigrp doesn’t restrict that neighbors m ...
... => Potential routing protocol for the core of a network; used in large networks. => For neighbor relation to be established, both routers must send and receive Hello or Ack packets from each other, they must have the same AS #, and the same Metric K values. => Eigrp doesn’t restrict that neighbors m ...
ppt
... – Short-term queuing of a few packets – Assumption: no long-term storage of data in the network ...
... – Short-term queuing of a few packets – Assumption: no long-term storage of data in the network ...
Asynchronous Resource Discovery
... In addition we have the following progress requirement: • When all nodes have no more messages to send, and all message queues are empty, exactly one leader will remain in each weakly connected component. The complexity of an algorithm for resource discovery measures the total number of bits and mes ...
... In addition we have the following progress requirement: • When all nodes have no more messages to send, and all message queues are empty, exactly one leader will remain in each weakly connected component. The complexity of an algorithm for resource discovery measures the total number of bits and mes ...
The Network Layer - London South Bank University
... a) RIP is based on distance vector routing, which uses the BellmanFord algorithm for calculating the routing table. b) RIP treats all network equals; the cost of passing thru a network is the same: one hop count per network. c) Each router/node maintains a vector (table) of minimum distances to ever ...
... a) RIP is based on distance vector routing, which uses the BellmanFord algorithm for calculating the routing table. b) RIP treats all network equals; the cost of passing thru a network is the same: one hop count per network. c) Each router/node maintains a vector (table) of minimum distances to ever ...
Part I: Introduction
... distributed algorithm that determines how nodes share channel, i.e., determine when node can transmit communication about channel sharing must use channel ...
... distributed algorithm that determines how nodes share channel, i.e., determine when node can transmit communication about channel sharing must use channel ...
IV. Mobile Agents in Wireless Sensor Network
... powered sensor nodes functioning in hostile, unattended sensing environment constrained in energy supply, it is of tremendous significance to investigate energy optimization methods to prolong the WSN lifetime. Target detection and location tracking is a typical WSN application that calls for effect ...
... powered sensor nodes functioning in hostile, unattended sensing environment constrained in energy supply, it is of tremendous significance to investigate energy optimization methods to prolong the WSN lifetime. Target detection and location tracking is a typical WSN application that calls for effect ...
module11-ospf
... • Currently in version 4 • Note: In the context of BGP, a gateway is nothing else but an IP router that connects autonomous systems. • Interdomain routing protocol for routing between autonomous systems • Uses TCP to send routing messages • BGP is neither a link state, nor a distance vector protocol ...
... • Currently in version 4 • Note: In the context of BGP, a gateway is nothing else but an IP router that connects autonomous systems. • Interdomain routing protocol for routing between autonomous systems • Uses TCP to send routing messages • BGP is neither a link state, nor a distance vector protocol ...
15-744: Computer Networking
... their respective customers Peers do not provide transit between peers ...
... their respective customers Peers do not provide transit between peers ...
Basic Scheme: Inter-domain Mobility
... – may arrive at an provider AS with a previous route to p. • the AS is a common provider to both the previous and current AS which the mobile network attaches to. • the AS suppresses it – a change of BS does not trigger updates among any tier-1 ISPs. ...
... – may arrive at an provider AS with a previous route to p. • the AS is a common provider to both the previous and current AS which the mobile network attaches to. • the AS suppresses it – a change of BS does not trigger updates among any tier-1 ISPs. ...
Networks
... – Less reliable and more expensive, and restrictions on bending – Cost, bandwidth, and distance of single-mode fiber affected by power of the light source, the sensitivity of the light detector, and the attenuation rate (loss of optical signal strength as light passes through the fiber) per kilomete ...
... – Less reliable and more expensive, and restrictions on bending – Cost, bandwidth, and distance of single-mode fiber affected by power of the light source, the sensitivity of the light detector, and the attenuation rate (loss of optical signal strength as light passes through the fiber) per kilomete ...
Network-INT201-06 - Department of Computer Engineering
... OSPF (Open Shortest Path First) “open”: publicly available ...
... OSPF (Open Shortest Path First) “open”: publicly available ...