DATA ALCOTT SYSTEM, www.finalsemprojects.com 09600095046
... severe threat, that of wormhole attacks, which undermines the performance gain of network coding. Since the underlying characteristics of network coding systems are distinctly different from traditional wireless networks, the impact of wormhole attacks and countermeasures are generally unknown. It i ...
... severe threat, that of wormhole attacks, which undermines the performance gain of network coding. Since the underlying characteristics of network coding systems are distinctly different from traditional wireless networks, the impact of wormhole attacks and countermeasures are generally unknown. It i ...
Computer Communication Networks HW8 2009/01/08 39. A network
... little later, the last fragment stumbles in. What should be done with it? Ans: As far as the receiver is concerned, this is a part of new datagram, since no other parts of it are known. It will therefore be queued until the rest show up. If they do not, this one will time out too. 51. A person who l ...
... little later, the last fragment stumbles in. What should be done with it? Ans: As far as the receiver is concerned, this is a part of new datagram, since no other parts of it are known. It will therefore be queued until the rest show up. If they do not, this one will time out too. 51. A person who l ...
Chapter 12 Routing
... • No network info required • Packet sent by node to every neighbor • Incoming packets retransmitted on every link except incoming link • Eventually a number of copies will arrive at destination • Each packet is uniquely numbered so duplicates can be discarded • Nodes can remember packets already for ...
... • No network info required • Packet sent by node to every neighbor • Incoming packets retransmitted on every link except incoming link • Eventually a number of copies will arrive at destination • Each packet is uniquely numbered so duplicates can be discarded • Nodes can remember packets already for ...
Stochastic Analysis of Dynamic Computer Processes
... entry-points to the network. Search: • A node sends query to its neighbors. • They in turn forward it to their neighbors: − decrement “Time to Live (TTL)’’ for query; − query dies when TTL = 0. ...
... entry-points to the network. Search: • A node sends query to its neighbors. • They in turn forward it to their neighbors: − decrement “Time to Live (TTL)’’ for query; − query dies when TTL = 0. ...
Chapter 8: Packet Switching and Routing
... Delay, Cost Decision time: Packet, session Decision place: Distributed, centralized, Source Network information source: None, local, adjacent nodes, nodes along route, all nodes Routing strategy: Fixed, adaptive, random, flooding Adaptive routing update time: Continuous, periodic, topology change, m ...
... Delay, Cost Decision time: Packet, session Decision place: Distributed, centralized, Source Network information source: None, local, adjacent nodes, nodes along route, all nodes Routing strategy: Fixed, adaptive, random, flooding Adaptive routing update time: Continuous, periodic, topology change, m ...
AODV-BR: Backup Routing in Ad hoc Networks
... have a route, it broadcasts a route request (RREQ) packet across the network . Nodes receiving this packet update their information for the source node and set up backwards pointers to the source node in the route tables . In addition to the source node's IP address, current sequence number, and bro ...
... have a route, it broadcasts a route request (RREQ) packet across the network . Nodes receiving this packet update their information for the source node and set up backwards pointers to the source node in the route tables . In addition to the source node's IP address, current sequence number, and bro ...
Systems Area: OS and Networking
... One or very few applications running on a sensornet vs huge number running in the Internet ...
... One or very few applications running on a sensornet vs huge number running in the Internet ...
Looking deeper into ARQ “frames”
... • “Frame” vs “ack”: – Both are frames (groups of bits); “Frame” means carrying payload data – Both ends might want to transmit data; more complicated. – May be distinguished by a type field in packet header (and/or time of transmission – e.g. WiFi acks) ...
... • “Frame” vs “ack”: – Both are frames (groups of bits); “Frame” means carrying payload data – Both ends might want to transmit data; more complicated. – May be distinguished by a type field in packet header (and/or time of transmission – e.g. WiFi acks) ...
Multiple Access and Spanning Tree
... • When there are multiple shortest paths to the root, choose the path that uses the neighbor switch with the lower ID. • One could use any tiebreaking system, but this is an easy one to remember and implement • In homeworks and test, remember this. ...
... • When there are multiple shortest paths to the root, choose the path that uses the neighbor switch with the lower ID. • One could use any tiebreaking system, but this is an easy one to remember and implement • In homeworks and test, remember this. ...
Document
... brings the host’s CPU to its knees attempting to process all the packets. – An attacker interfaces with the packets that are flowing between two nodes. – In the case of mobile node, if an attacker send a request message to HA as his IP address as the care of address for a mobile node then: • Attacke ...
... brings the host’s CPU to its knees attempting to process all the packets. – An attacker interfaces with the packets that are flowing between two nodes. – In the case of mobile node, if an attacker send a request message to HA as his IP address as the care of address for a mobile node then: • Attacke ...
A Connectionless Approach to Intra- and Inter
... existing multi-paths. We propose a two phase validation algorithm for this purpose. The main idea behind the validation algorithm is that a path is “valid” or forwarding along a path exists if the path suffix is valid. In the first phase a router computes all the available paths. In the second phase ...
... existing multi-paths. We propose a two phase validation algorithm for this purpose. The main idea behind the validation algorithm is that a path is “valid” or forwarding along a path exists if the path suffix is valid. In the first phase a router computes all the available paths. In the second phase ...
Chapter 39 - Personal Web Pages
... Instead of 5GB being necessary Three 50MB files (150MB) are needed ...
... Instead of 5GB being necessary Three 50MB files (150MB) are needed ...
ppt
... • Programming network applications requires knowledge of the protocol and the communication layers. From the perspective of applications networking is a service that allows an application to send and receive data from other computers. • PCs connected to the network have unique addresses/names known ...
... • Programming network applications requires knowledge of the protocol and the communication layers. From the perspective of applications networking is a service that allows an application to send and receive data from other computers. • PCs connected to the network have unique addresses/names known ...
Node Localization in Sensor Networks
... Each node names data with one or more attributes Other nodes express interests based on these attributes Network nodes propagate the interests and results back to the sink Negative gradients inhibit the propagation of information & positive gradients encourage information propagation Assum ...
... Each node names data with one or more attributes Other nodes express interests based on these attributes Network nodes propagate the interests and results back to the sink Negative gradients inhibit the propagation of information & positive gradients encourage information propagation Assum ...
Chapter 15 Local Area Networks
... • Bridge only analyzes and forwards one frame at a time • Switch has multiple parallel data paths — Can handle multiple frames at a time ...
... • Bridge only analyzes and forwards one frame at a time • Switch has multiple parallel data paths — Can handle multiple frames at a time ...
Network Protocols Designed for Optimizability Jennifer Rexford Computer Science Department Princeton University
... the traffic matrix from other measurement data, such as link utilization statistics [5], with varying degrees of accuracy, but the problem remains challenging. As an another example, the Border Gateway Protocol (BGP)— the interdomain routing protocol for the Internet—has a tie-breaking rule that dep ...
... the traffic matrix from other measurement data, such as link utilization statistics [5], with varying degrees of accuracy, but the problem remains challenging. As an another example, the Border Gateway Protocol (BGP)— the interdomain routing protocol for the Internet—has a tie-breaking rule that dep ...
ppt - NOISE
... – IP relies on connectivity to next hop, access to medium – IP provides a datagram service • Best effort delivery • Packets may be lost, corrupted, reordered, etc. – Layers on top of IP (e.g., TCP) may guarantee reliable, in-order delivery ...
... – IP relies on connectivity to next hop, access to medium – IP provides a datagram service • Best effort delivery • Packets may be lost, corrupted, reordered, etc. – Layers on top of IP (e.g., TCP) may guarantee reliable, in-order delivery ...
Multiple Processor Systems
... src to destination; IP (Internet Protocol) – Transport – provides a msg service to apps; apps don’t need to care that communication is in packets; TCP, UDP – Application – implementing app need; Web, DNS, P2P, email … and protocols like HTTP, DNS, SMTP … Application Transport Network Link ...
... src to destination; IP (Internet Protocol) – Transport – provides a msg service to apps; apps don’t need to care that communication is in packets; TCP, UDP – Application – implementing app need; Web, DNS, P2P, email … and protocols like HTTP, DNS, SMTP … Application Transport Network Link ...
PPTX - UCSB Computer Science
... requirements, no meta data, no replication – same with Random (but random gives an edge in low mobility environments) – best suited to achieve highest power savings Contrary would be epidemic – highest delivery ratio, high latency – not desirable even with high resources (storage and power) All thre ...
... requirements, no meta data, no replication – same with Random (but random gives an edge in low mobility environments) – best suited to achieve highest power savings Contrary would be epidemic – highest delivery ratio, high latency – not desirable even with high resources (storage and power) All thre ...
Security In Wireless Sensor Networks
... requires that keys be set up among all end points and be incompatible with passive participation and local broadcast – link-layer cryptography with a network-wide shared key simplifies key setup and supports passive participation and local broadcast, but intermediate nodes might eavesdrop or alter m ...
... requires that keys be set up among all end points and be incompatible with passive participation and local broadcast – link-layer cryptography with a network-wide shared key simplifies key setup and supports passive participation and local broadcast, but intermediate nodes might eavesdrop or alter m ...
Networking
... TCP – verifies the accurate delivery of data from client to server. TCP can detect errors or lost data and controls re-transmission if the data is not accurate or entirely received ...
... TCP – verifies the accurate delivery of data from client to server. TCP can detect errors or lost data and controls re-transmission if the data is not accurate or entirely received ...