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投影片 1
投影片 1

... wireless network. It is dynamically formed amongst groups of mobile users having wireless network. ...
Ch. 8 Circuit Switching
Ch. 8 Circuit Switching

Routing protocols
Routing protocols

... updates must be halted as soon as it is practical to do so. In a RIP environment, costs continue to increment until they reach a maximum value of 16. (This limit is defined in RFC ...
Experiments - DVS
Experiments - DVS

... Wesley W. Terpstra, Christof Leng, Max Lehn, Alejandro P. Buchmann. Channel-based Unidirectional Stream Protocol (CUSP). Proceedings of the IEEE INFOCOM Mini Conference, March 2010 Sebastian Kaune, Konstantin Pussep, Aleksandra Kovacevic, Christof Leng, Gareth Tyson, Ralf Steinmetz. Modelling the In ...
List six access technologies
List six access technologies

... b. For the remainder of this problem, suppose packet switching is used. Why will there be essentially no queuing delay before the link if two or fewer users transmit at the same time? Why will there be a queuing delay if three users transmit at the same time? <4 points> c. Find the probability that ...
One Decoding Step
One Decoding Step

... Aman Shaikh ...
ap 12
ap 12

... Foreign agents are expected to issue agent advertisement messages periodically If a mobile node needs agent information immediately, it can issue ICMP router solicitation message ...
Mobile IP and Wireless Application Protocol
Mobile IP and Wireless Application Protocol

ppt
ppt

... A router sends its known distances to each destination (distance vector) to its neighbors. A router updates the distance to a destination from all its neighbors’ distance vectors A router sends its updated distance vector to its neighbors. The process repeats until all routers’ distance vectors do n ...
No Slide Title - Columbia University
No Slide Title - Columbia University

... A routing protocol specifies ...
Unit 5 – Network Layer
Unit 5 – Network Layer

static routing
static routing

... • When two or more routes to the same destination have identical metric values • The router does not choose only one route. • Instead, the router "load balances" between these equal cost paths. The packets are forwarded using all equal-cost paths. • Note: Load balancing can be done either per packet ...
PDF - at www.arxiv.org.
PDF - at www.arxiv.org.

... the sink. This method can significantly decrease the load of the nodes in the critical areas, while only minimally affecting the performance of the network. [18] treats DTN routing as a resource allocation problem that translates the routing metric into per-packet utilities that determine how packet ...
Q and A slides
Q and A slides

... • OSPF uses a link-state algorithm for computing best routes. – Each router builds up a picture of the network in memory – which routers connect to each other, and which routers connect to which networks. – Each router then computes best ways for it to get to remote networks and adds routes to its r ...
Internet Protocols
Internet Protocols

Every Node Is Born Equal - Academic Server| Cleveland State
Every Node Is Born Equal - Academic Server| Cleveland State

... itself to all possible destinations and they collectively constitute all-pairs shortest paths. Practically, each node keeps a subset of the paths in different forms based on the underlying routing algorithm. In AODV, each node keeps the next hop node and the number of hops to the destination. And in ...
Sensors, Databases and Flash Storage
Sensors, Databases and Flash Storage

... neighboring node (remote cache hit), forwards the request to the neighboring node with the largest residual energy • If the request can not be satisfied by this mediator node, then it does not forward it recursively to its own mediators, since this will be done by the routing protocol, e.g., AODV • ...
EN 1070510
EN 1070510

... CAN bus. A Node to Node communication link has been established which are connected via CAN bus so as to observe and control the temperature values, transfer on the CAN bus and send the control signals onto the another node. The hardware boards are designed to be capable of supporting high speed bit ...
Chp. 4, Part II - comp
Chp. 4, Part II - comp

... 5. MTU and packet fragmentation • Each IP fragment contains enough information for forwarding to the destination. • A fragmented IP datagram will be reassembled only at the destination node. • If any fragments do not arrive within a certain time, other received fragments in the datagram will be dis ...
Search in structured networks
Search in structured networks

Ch01
Ch01

... • Longer messages broken up into series of packets • Transmitting computer sends message as sequence of packets. • Packet includes control information including destination station. • Packets sent to node to which sending station attaches • Node stores packet briefly, determines next leg of route, a ...
Hybrid Architectures: Accounting for Networks Exuding DTN and
Hybrid Architectures: Accounting for Networks Exuding DTN and

Internetworking
Internetworking

... • The HA then encapsulates the IP packet in a Mobile IP packet and sends it to the FA. The FA unpacks the packet and deliver it to the mobile host. This uses the tunnelling technique. • The HA also send the care-of address of the mobile host to the original sender. • If the sender is Mobile IP enabl ...
Chapter-6 Presentation
Chapter-6 Presentation

... Configuring static routes Routers do not need to configure static routes for their own directly connected networks. We need to configure static routes for networks this router needs to reach. We will need to configure static routes for the other routers as well, as “routing information about a path ...
No Slide Title
No Slide Title

... – 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. – When the system is very busy, many collisions may occur, and thus performance may be ...
< 1 ... 115 116 117 118 119 120 121 122 123 ... 181 >

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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