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Computer Networks and Internets
Computer Networks and Internets

...  Hop ...
Chapter 25
Chapter 25

...  Hop ...
chapter1
chapter1

... A set of rules for communications Implemented in software and hardware Building blocks of a network architecture Each protocol object has two different interfaces – service interface: operations on this protocol – peer-to-peer interface: messages exchanged with peer ...
Intradomain routing
Intradomain routing

... Robustness • Nodes may advertise • Nodes may advertise incorrect ...
THE IP MOBILITY APPROACH
THE IP MOBILITY APPROACH

... - Network with mobile host that can only maintain connection to one base station (TDMA network) - Network with mobile hosts that can be connected to two or more base stations simultaneously (CDMA network) ...
Part I: Introduction
Part I: Introduction

... Routing protocols •path selection •RIP, OSPF, BGP ...
Document
Document

... – MRT format RIBs and BGP updates, “show ip bgp” dumps, route dampening data – only E-BGP ...
GW2412271231
GW2412271231

... efficient as they do not involve heavy computations and hence are applied in the area of security for message authentication and integrity checks. The problem with hash functions is collision. Collision is a situation where a hash function generates the same hash value for more than one different in ...
CarNet - Disco Lab - Rutgers University
CarNet - Disco Lab - Rutgers University

... •Distributed algorithm f(i): maps each node identifier to a location list •Locations produced by f(i) act as node-i’s location servers •When node-i moves, it uses geographic forwarding to send position updates to the locations specified by the hash function •Nodes close to these locations remember n ...
Chapter 4: Network Layer
Chapter 4: Network Layer

... • net topology, link costs known to all nodes – accomplished via “link state broadcast” – all nodes have same info • computes least cost paths from one node (‘source”) to all other nodes – gives routing table for that node • iterative: after k iterations, know least cost path to k destinations ...
A Connectivity Based Partition Approach for Node
A Connectivity Based Partition Approach for Node

... – Use static nodes to help get more accurate delay estimation • Let adjacent static nodes measure the delay of the corresponding link, and propagate the delay measurement • Each static node updates its delay matrix according to the received up-to-date delay measurement. ...
A Data Dissemination Method for Supporting Mobile Sinks in
A Data Dissemination Method for Supporting Mobile Sinks in

... Directed –diffusion TTDD (Two Tier Data Dissemination) ...
Introduction
Introduction

...  Multiplexing and Demultiplexing (demux key) ...
Chapter 16
Chapter 16

... The Hello Protocol • Each machine maintained a table of best estimate of clocks in its neighbor’s machines • Before transmitting a packet, a machine adds its timestamp from its current clock value • When the packet arrived at the receiver, an estimate of delay was computed – Timestamp - local estim ...
A Study on Effective Hash Routing in MANET
A Study on Effective Hash Routing in MANET

... The MANET model is made up using the NS3 for performance evaluation of suggestion technics. Firstly, according to IEEE 802.11 link layer and the TDMA(Time Division Multiple Access), traffic agents of the MN and application services are decided by the CSMA(Carrier Sense Multiple Access) using the MN ...
ppt
ppt

...  Are distributed using flooding ...
Dominating-Set-Based Routing in Ad Hoc Wireless Networks
Dominating-Set-Based Routing in Ad Hoc Wireless Networks

... Localized maintenance (update) ...
PPT Version
PPT Version

... The last node on ERO list could have send Path message directly to the egress node, without the Router Alert IP option. The nodes in the middle do not need to keep the RSVP state for the RSP ...
Internet Control Message Protocol (ICMP) Chapter 7
Internet Control Message Protocol (ICMP) Chapter 7

... • A very common use of ICMP is the passing of error information between host and router • ICMP helps to keep the network running when a router goes off line • All messages are carried as IP datagrams • Dynamic routers use ICMP messages to announce the contents of their routing tables • Hosts listen ...
Sensor Networks
Sensor Networks

... • Divide the network into a number of equal clusters each ideally containing the same # of nodes • Cluster heads form a routing backbone • Clustering is NP-complete • Mobility may make a good clustering become bad later • Data aggregation: Combining cluster data readings into a single packet can sav ...
Interconnection Networks: Topology and Routing
Interconnection Networks: Topology and Routing

... • Channel Load – Amount of traffic through channel c if each input node injects 1 packet in the network ...
Secure Routing in VANET
Secure Routing in VANET

... • Every other (n-1) beacon is sent unsecured. – Match data using movement prediction. ...
PPTX
PPTX

... – No node is more important than any other ...
Wireless Sensor Networks M Homework #1
Wireless Sensor Networks M Homework #1

... The performance of the network in star topology, when no hidden terminal problem is present, are shown in the following slide for different parameters and for the case of SO=2. Assume the improvement (for pmac) and the worsening (for Dmean) when passing from the BEmin=3 & BEmax=5, to BEmin=4 & BEmax ...
CAN
CAN

...  [5] B. Zhao and J. Kubiatowicz and A. Joseph, “Tapestry: An infrastructure for faulttolerant wide-area location and routing”, U. C. Berkeley, 2001  [6] M. Castro, P. Druschel, Y. C. Hu, and A. Rowstron, "Topologyaware routing in structured peer-to-peer overlay networks“, presented at Intl. Worksh ...
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Routing in delay-tolerant networking

Routing in delay-tolerant networking concerns itself with theability to transport, or route, data from a source to adestination, which is a fundamental ability all communication networks musthave. Delay- and disruption-tolerant networks(DTNs) are characterized by their lack of connectivity, resulting in a lack of instantaneous end-to-end paths. In these challenging environments, popular ad hoc routing protocols such as AODV and DSR fail to establish routes. This is due to these protocols trying to first establish a complete route and then, after the route has been established, forward the actual data. However, when instantaneous end-to-end paths are difficult or impossible to establish, routing protocols must take to a ""store and forward"" approach, where data isincrementally moved and stored throughout the network in hopes that it will eventually reach its destination. A common technique used tomaximize the probability of a message being successfully transferred is toreplicate many copies of the message in hopes that one will succeed inreaching its destination.
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