Results 1 - 10 of 69

Modeling Internet Topology

by Kenneth Calvert, Matthew B. Doar, Ellen W. Zegura - IEEE COMMUNICATIONS MAGAZINE , 1997
"... The topology of a network, or a group of networks such as the Internet, has a strong bearing on many management and performance issues. Good models of the topological structure of a network are essential for developing and analyzing internetworking technology. This article discusses how graph-based ..."
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-based models can be used to represent the topology of large networks, particularly aspects of locality and hierarchy present in the Internet. Two implementations that generate networks whose topology resembles that of typical internetworks are described, together with publicly available source code.

Smoothing Variable-Bit-Rate Video in an Internetwork

by Jennifer Rexford, Don Towsley - IEEE/ACM Transactions on Networking , 1999
"... The burstiness of compressed video complicates the provisioning of network resources for emerging multimedia services. For stored video applications, the server can smooth the variable-bit-rate stream by prefetching frames into the client playback buffer in advance of each burst. Drawing on a priori ..."
Abstract - Cited by 47 (3 self) - Add to MetaCart
priori knowledge of the frame lengths and client buffer size, such bandwidth smoothing techniques can minimize the peak and variability of the rate requirements while avoiding underflow and overflow of the playback buffer. However, in an internetworking environment, a single service provider typically

Scalability Analysis of the TurfNet Internetworking

by Jordi Pujol, Stefan Schmid, Lars Eggert, Marcus Brunner
"... Abstract — TurfNet is an internetworking architecture that enables communication among autonomous and heterogeneous network domains. The architecture uses a global identity namespace and does not require global addressing or a common internetworking protocol. It integrates the new concept of dynamic ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
of the first scalability analyses of any next-generation internetworking proposal based on today's Internet AS topology. It adapts existing research results on the topology of the Internet’s autonomous system graph and related results that quantify typical traffic patterns to construct a realistic model

Issues in Internetworking Wireless Data Networks for Mobile Computing

by S. T. Vuong, Y. Q. Yu, H. Shi, M. Haahr
"... Abstract- There are many issues specijk to the area of mobile computing which need to be addressed This paper will discuss the particular issues of mobile hosts, network management and security. I. MOBILE HOSTS One of the most popular protocol suites for network interoperability is TCP/IP. According ..."
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at the network layer alone, and thus the support at both the higher and lower layers is needed. Currently, there are several typical proposals extending the

tcplib: A Library of Internetwork Traffic Characteristics

by Peter B. Danzig, Sugih Jamin , 1991
"... This paper describes tcplib, a workload or source library for network simulation. This paper motivates the need for tools like tcplib and discusses how to incorporate it into a network simulator. Tcplib is available by anonymous ftp 1 . 1. Introduction When simulating computer networks, it is necess ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
, it is necessary to specify the traffic between network nodes. Typically, simulation studies of wide-area TCP/IP networks model traffic as a combination of Poisson processes and maximal rate streams---corresponding to TELNET traffic and large file transfers respectively. Such traffic models are justified when

An Empirical Study on Route Reservation in Inter-Networks

by Dr. Dhrub Prasad, Dr. Kumar, Balwant Singh, Shafiqul Abidin
"... Abstract — While it is obvious that transmission without route reservation is suitable for a wired data network such as Internet, it is not clear whether this is true in the case of ad hoc wireless networks. To the best of our knowledge, this has not been studied in the literature. In this paper, we ..."
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, we investigate the performance of two switching paradigms: reservation-based (RB) and non-reservation based (NRB). In an NRB scheme, no reservation is required before data transmission, data transmission can begin as soon as a source discovers a route. This is the typical scheme used for most

A New Approach to Multicast Communication in a Datagram Internetwork

by Anthony Ballardie , 1995
"... Multicasting is a technique that enables a single packet transmission to reach one or more destinations or group. The primary benefits of a packet reaching multiple destinations from a single transmission are threefold: bandwidth minimization; the exploitation of parallelism in the network; the opti ..."
Abstract - Cited by 23 (0 self) - Add to MetaCart
involves the presentation of a new multicast architecture and protocol, designed for best-effort, connectionless datagram networks such as the IP Internet. This new architecture typically offers considerably more favourable scaling characteristics than do existing multicast schemes. Our other most

A Pedagogical Evaluation of New State Model Diagrams for Teaching Internetwork Technologies

by S P Maj, et al.
"... Curriculum based on internetworking devices is primarily based on the Command Line Interface (CLI) and case studies. However a single CLI command may produce output that is not only hierarchical but must also be interpreted – both represent learning difficulties for novices. It should also be noted ..."
Abstract - Cited by 3 (1 self) - Add to MetaCart
that device status requires many different CLI commands. Internetworking curriculum also typically defines devices as ‘black boxes’- this is not a good teaching strategy. New state models were designed that diagrammatically integrated relevant output from different CLI commands with protocol finite state

Emergence of Small-Scale Magnetic Loops in the Quiet Sun Internetwork

by R. Centeno, H. Socas-navarro, B. Lites, M. Kubo, Z. Frank, R. Shine, T. Tarbell, K. Ichimoto, S. Tsuneta, Y. Katsukawa, Y. Suematsu, T. Shimizu, S. Nagata , 708
"... We study the emergence of magnetic flux at very small spatial scales (less than 2 arcsec) in the quiet Sun internetwork. To this aim, a time series of spectropolarimetric maps was taken at disk center using the instrument SP/SOT on board Hinode. The LTE inversion of the full Stokes vector measured i ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
We study the emergence of magnetic flux at very small spatial scales (less than 2 arcsec) in the quiet Sun internetwork. To this aim, a time series of spectropolarimetric maps was taken at disk center using the instrument SP/SOT on board Hinode. The LTE inversion of the full Stokes vector measured

SUMER Observations Confirm the Dynamic Nature of the Quiet Solar Outer Atmosphere: The Inter-network Chromosphere

by Mats Carlsson, P. G. Judge, K. Wilhelm , 1997
"... On 12 March 1996, during the commissioning phase of the SOHO mission, we obtained observations of the quiet Sun with the SUMER instrument. The observations were sequences of 15-20 second exposures of ultraviolet emission line profiles and of the neighboring continua. These data contain signatures of ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
of the dynamics of the solar chromosphere that are uniquely useful because of wavelength coverage, moderate signal-to-noise ratios, and image stability. We focus on data for the inter-network chromosphere. The dominant observed phenomenon is an oscillatory behavior that is analogous to the 3 minute oscillations
Results 1 - 10 of 69