An essay on interconnecting satellite and atm networks

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An essay on interconnecting satellite and atm networks

How to Write a Summary of an Article? Most future networks will be hybrid in nature — having terrestrial nodes interconnected by satellite links. In this article we address the issue of securing communication in satellite networks.

We discuss various security attacks that are possible in hybrid SSSL session 1 SSSL handshaking and satellite translation at client proxy RPA networks, and survey the different solutions proposed to secure data communications in these networks.

We look at the perforMost future networks mance problems arising in hybrid networks due to security additions like Internet Security Prowill be hybrid in tocol IPSec or Secure Socket Layer SSLand suggest solutions to performance-related nature — having problems.

We also point out important drawbacks in the proposed solutions, and suggest a terrestrial nodes hierarchical key-management approach for interconnected by adding data security to group communication in hybrid networks. Security is an important concern in such networks, since the satellite segment is susceptible to a host of attacks, including eavesdropping, session hijacking and data corruption.

The primary advantage of satellite networks is their wide broadcast reach — a satellite can reach users in remote areas where terrestrial connectivity is not available. Satellite networks are also easily and quickly deployed, and can be a more cost-effective solution in areas where laying ground fiber networks would be too expensive.

Although satellite networks offer great potential, they also present significant challenges that need to be addressed. Security is becoming an increasingly important aspect of all network. In this article we focus on the challenges that need to be addressed in order to make satellite networks more secure while maintaining seamless interoperability with terrestrial networks.

These security-related challenges include the following considerations: Satellite networks also suffer from long propagation delays for example, 0. Therefore, security systems should add minimal delays to the communication and have mechanisms to recover from loss in security information.

In this article we consider some of these issues. We focus on data security for IP-based commercial networks, and discuss the performance problems that arise due to the encryption of the Transmission Control Protocol TCP header and payload when popular unicast security protocols like IPSec or SSL, originally designed for terrestrial connections, are applied to satellite networks without incorporating changes necessitated by the unique characteristics of satellite networks.

We also look at the protocols proposed for secure group communication in hybrid satellite networks, and describe a hierarchical approach to group key management that is robust, scalable, and suitable for the characteristic topology of hybrid networks.

The rest of the article is organized as follows. We describe the hybrid satellite-network topology and features that make it different from terrestrial networks. We discuss security needs for the hybrid network. We discuss the current approach to provide end-to-end unicast security in hybrid networks, and describe the performance problems arising as a result.

Commercial direct-to-home network topology: We describe a possible solution to secure unicast communication without sacrificing performance and highlight our key-management approach to security for group communication in satellite networks.

We conclude the article by pointing to future research directions.

An essay on interconnecting satellite and atm networks

Satellite TCP connections need large transmit windows to fully utilize the available bandwidth. However, due to the TCP slowstart algorithm and large propagation delay in the satellite channel, it takes much longer for satellite TCP connections to reach the target window size, in comparison to terrestrial TCP connections.

Also, the window is very vulnerable to congestion due to the multiplicative decrease strategy of TCP. The problem is compounded by the fact that TCP misinterprets link-layer corruption which is the prevalent source of loss in satellite links as congestion which is rare and consequently reduces the window.

The PEP provides an efficient solution to the above problem.

Literature review Abstract In recent years, there has been increasing interest in interconnecting satellite and ATM networks because both share common characteristics of the ability to provide bandwidth-on-demand and flexibility of integrating voice, video and data services. There are several new satellite constellation proposals that support multimedia service and transport ATM traffic.
Computer system engineer University of California, Santa Barbara Type of paper: Essay This essay has been submitted by a student.

In satellite networks, a PEP agent is installed at the satellite gateway between the satellite network and the Internet. These premature acknowledgments are specially formatted to be indistinguishable from real acknowledgments and they considerably shorten the perceived round-trip delay.

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Studies have shown that this technique is critical for the performance improvement of satellite networks [2—4]. Commercial networks also employ HTTP proxy servers to improve the speed of responses to Web-browser requests. Each embedded object has to be retrieved with a separate HTTP request-and-response exchange.

This can be extremely costly in a satellite network, where the RTT is usually high. In both topologies, we assume that there is one geostationary satellite with multiple spot-beams covering a large geographical area. Each spot-beam covers a subset of the total user set.

We assume that future satellites will have an IP stack, be capable of onboard processing, and switch the data between supported spotbeams. The satellite therefore acts as an IP router-in-thesky. The NOC is also connected to the Internet through high-speed terrestrial links.

Terrestrial users can be either standalone machines Fig.Essay Writing Service Secure your Vasudevan () defines computer networking as the process of interconnecting series of communication devices for the purpose of facilitating the collection, storage, retrieval and sharing of information.

An essay on interconnecting satellite and atm networks

The application of neural computer networks in the prediction of stock market entails the use of. This history of the telephone chronicles the development of the electrical telephone, The relatively good performance of the U.S.

occurred despite competing telephone networks not interconnecting. What turned out to be the most popular and longest lasting physical style of telephone was introduced in the early 20th century. Ordered a megabits/second network interface card for our NetStar Gigarouter for indirectly interconnecting HIPPI-attached computers such as the new CRAY T3E, the three CRAY Jse's, and the Convex/UniTree system to the megabits/second ATM network testbed.

TCP/IP over ATM’s Abstract: A real-time and Multimedia application which runs on Integrated Service Internet is rapidly becoming a reality. It is an important problem to integrate ATM networks into this Integrated Service Internet. The network design you choose to implement should fit the commu- less networks to solve their communication problems, including diagrams of the essential network structure.

Finally, we will present several common link protocols are Ethernet, Token Ring, ATM, and the wireless networking protocols (a/b/g).

Telecommunications Networks and their Scope. Cell Relay: (asynchronous transfer mode, or ATM) transfers very short fixed-length packets, called cells, A major obstacle to its development has become the limited capacity of the links interconnecting .

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