slides - network systems lab @ sfu
... − Detected by the absence of heart beat messages sent periodically in regular operation − Neighbors initiate takeover timers, proportional to the volume of their zones − Neighbor with smallest timer takes over zone of dead node − notifies other neighbors so they cancel their timers (some negotiation ...
... − Detected by the absence of heart beat messages sent periodically in regular operation − Neighbors initiate takeover timers, proportional to the volume of their zones − Neighbor with smallest timer takes over zone of dead node − notifies other neighbors so they cancel their timers (some negotiation ...
Chapter Questions Chapter 1 1. The network card, the monitor
... C. The magnetic fields from one cable run cancel magnetic fields of another cable run. D. External magnetic fields cancel fields inside network cabling. 15. What is it called when two bits from two different communicating computers are on a shared medium at the same time? A. B. C. D. ...
... C. The magnetic fields from one cable run cancel magnetic fields of another cable run. D. External magnetic fields cancel fields inside network cabling. 15. What is it called when two bits from two different communicating computers are on a shared medium at the same time? A. B. C. D. ...
ppt
... Other Main Driving Goals (In Order) • Communication should continue despite failures – Survive equipment failure or physical attack – Traffic between two hosts continue on another path ...
... Other Main Driving Goals (In Order) • Communication should continue despite failures – Survive equipment failure or physical attack – Traffic between two hosts continue on another path ...
Lecture 6 - Aerobic Suspended Growth
... ATM switch is fast 155 Mbps and used to connect Ethernet networks. Since ATM is not shared-media (like Ethernet) the broadcast and multicast are complicated to implement. ...
... ATM switch is fast 155 Mbps and used to connect Ethernet networks. Since ATM is not shared-media (like Ethernet) the broadcast and multicast are complicated to implement. ...
ppt - UCI
... Useful for multimedia (video, audio) but not for other data Cf) erasure coding for large data file ...
... Useful for multimedia (video, audio) but not for other data Cf) erasure coding for large data file ...
EE 122: Computer Networks - EECS Instructional Support Group
... Evolution of Ethernet • Changed everything except the frame format – From single coaxial cable to hub-based star – From shared media to switches – From electrical signaling to optical ...
... Evolution of Ethernet • Changed everything except the frame format – From single coaxial cable to hub-based star – From shared media to switches – From electrical signaling to optical ...
p2p2004f - David Hales
... Assume nodes maintain some max. degree Node neighbours can be thought of as a group Nodes may be good guys, share resources with neighbours, or free-ride, using neighbours resources but not sharing theirs (PD) Sharing / free-riding is a Strategy The neighbour links (as a whole) a kind of “ ...
... Assume nodes maintain some max. degree Node neighbours can be thought of as a group Nodes may be good guys, share resources with neighbours, or free-ride, using neighbours resources but not sharing theirs (PD) Sharing / free-riding is a Strategy The neighbour links (as a whole) a kind of “ ...
Network Coding with Unreliable, Unknown Bandwidths.
... • Network coding changes the way that we can consider data manipulation and dissemination in networks • One important aspect of this is how to characterize the usefulness of nodes’ received information consisting of coded packets • We examine two main areas: – File dissemination among nodes in wirel ...
... • Network coding changes the way that we can consider data manipulation and dissemination in networks • One important aspect of this is how to characterize the usefulness of nodes’ received information consisting of coded packets • We examine two main areas: – File dissemination among nodes in wirel ...
ppt
... • Collision avoidance, not detection – First exchange control frames before transmitting data • Sender issues “Request to Send” (RTS), including length of data • Receiver responds with “Clear to Send” (CTS) ...
... • Collision avoidance, not detection – First exchange control frames before transmitting data • Sender issues “Request to Send” (RTS), including length of data • Receiver responds with “Clear to Send” (CTS) ...
slides - University of Houston
... Small size of sensor node Limited battery capacity and lower hardware performance Overlapping sensing areas (redundancy) The network may be formed by randomly throwing thousands or even millions of sensor nodes in an area. Frequent change of network topology The network is usually installed in ...
... Small size of sensor node Limited battery capacity and lower hardware performance Overlapping sensing areas (redundancy) The network may be formed by randomly throwing thousands or even millions of sensor nodes in an area. Frequent change of network topology The network is usually installed in ...
Chapter 1
... The hierarchical design model includes the following three layers: The access layer provides users in workgroups access to the network. The distribution layer provides policy-based connectivity. The core layer provides optimal transport between sites. The core layer is often referred to as t ...
... The hierarchical design model includes the following three layers: The access layer provides users in workgroups access to the network. The distribution layer provides policy-based connectivity. The core layer provides optimal transport between sites. The core layer is often referred to as t ...
Using NViz tool for Environmental Sensor Networks Anh-Vu Dinh-Duc , Non-member
... WSN applications in the fields of environmental monitoring, security, industrial control, and object tracking have been introduced and deployed in practice. Despite the rapid development of sensor networks, there are still many challenges developers face in deployment of WSN applications: 1) Informat ...
... WSN applications in the fields of environmental monitoring, security, industrial control, and object tracking have been introduced and deployed in practice. Despite the rapid development of sensor networks, there are still many challenges developers face in deployment of WSN applications: 1) Informat ...
2 - Distributed Systems
... Link stress: how often does a multicast message cross the same physical link? Example: message sent by A needs to cross twice
Stretch: ratio in delay between overlay path and network‐level path. Example:
message from B to C follow path of length 71 in overlay but 47 at network‐level =>
...
... Link stress: how often does a multicast message cross the same physical link? Example: message sent by A needs to cross
Types of Traffic in AVB 2
... – Block non-control traffic during particular windows of time to ensure that the egress port for a control stream is idle when the control traffic is expected – Each egress port could have a separate schedule ...
... – Block non-control traffic during particular windows of time to ensure that the egress port for a control stream is idle when the control traffic is expected – Each egress port could have a separate schedule ...
3rd Edition: Chapter 4
... advertisements (LSA) flooded to entire AS carried in OSPF messages directly over IP, protocol 89 (rather than TCP or UDP) ...
... advertisements (LSA) flooded to entire AS carried in OSPF messages directly over IP, protocol 89 (rather than TCP or UDP) ...
Lecture 1
... • Purpose of the reference model was to provide a framework for the development of protocols • OSI also provided a unified view of layers, protocols, and services which is still in use in the development of new protocols • Detailed standards were developed for each layer, but most of these are not i ...
... • Purpose of the reference model was to provide a framework for the development of protocols • OSI also provided a unified view of layers, protocols, and services which is still in use in the development of new protocols • Detailed standards were developed for each layer, but most of these are not i ...
local area networks
... Collision detection is generally referred to as CSMA/CD (carrier sense multiple access with collision detection). In this access method, each node with a message to send waits until there is no traffic on the network and then transmits. While the node is transmitting, its collision detection circuit ...
... Collision detection is generally referred to as CSMA/CD (carrier sense multiple access with collision detection). In this access method, each node with a message to send waits until there is no traffic on the network and then transmits. While the node is transmitting, its collision detection circuit ...
Generic And BRAND : Taking Cialis With Nitric Oxide
... may lead to inability to visit certain web sites, unusually slow network response times, etc. Typically, DoS attacks attempt to consume available network and computing resources such as bandwidth, CPU time, or a computer’s main memory. As a result, the targeted machines and networks can no longer su ...
... may lead to inability to visit certain web sites, unusually slow network response times, etc. Typically, DoS attacks attempt to consume available network and computing resources such as bandwidth, CPU time, or a computer’s main memory. As a result, the targeted machines and networks can no longer su ...
njit-etd2005-146 - New Jersey Institute of Technology
... request packets being sent across the network. lera, et al. [12] proposed adaptive request zones where the request zone is reduced as the route request travels along intermediate nodes, based on any additional information available. The LAR protocol assumes that the mobile nodes have the location in ...
... request packets being sent across the network. lera, et al. [12] proposed adaptive request zones where the request zone is reduced as the route request travels along intermediate nodes, based on any additional information available. The LAR protocol assumes that the mobile nodes have the location in ...