Este documento resume los conceptos clave de las redes y la seguridad. Explica los tipos de redes, sus elementos, protocolos de Internet como TCP/IP y DHCP, y cómo compartir archivos, carpetas e impresoras en Windows. También define virus comunes como troyanos y espías, y soluciones de seguridad como antivirus, cortafuegos y antispam. Por último, cubre tecnologías inalámbricas como Bluetooth e infrarrojos.
Ausgrid is investing more than $1 billion in the Sydney CBD electricity network over five years to 2014. Ausgrid's Sydney CityGrid project involves constructing new substations, replacing and upgrading high-voltage cables and constructing a new tunnel to link into our existing network of CBD cable tunnels. These tunnels connect to form an 8 km ring under Sydney's CBD that interconnects Ausgrid's substations.
To provide a GRN P-25 coverage solution into these tunnels for Ausgrid's maintenance staff presented a challenge. Coverage is provided by utilising 'radio over fibre' repeater technology which rebroadcasts the NSW Government Radio Network from two dedicated base station sites located in two of Ausgrid's substations. Radiating cable, fixed to the ceiling of the tunnel, distributes the radio signals to the user in the tunnel, providing a method of communications deep underneath Sydney's CBD, where previously there was no way of communicating with the outside world.
Steve Harvey, Engineering Manager, Distributed Coverage and Capacity Solutions (DCCS), CommScope
“Hybrid communication systems, FSO/RF and RoF: reliable and scaled communicat...Joaquin Perez
Title:
“Hybrid communication systems, FSO/RF and RoF: reliable and scaled communications anywhere”
Abstract:
Current network and telecommunication systems are required to provide higher data rates in access
networks to an increasing number of users. This fact is mainly due to the increase in the Internet
traffic data, which is related with the higher demand of online added-value online content, as a result
of a society increasingly more interconnected. New emergent radio technologies play a key role to
supply these high-demand services to customer, e.g., UWB, WIMAX and LTE-advanced. [1-3]
How to carry them to final customer? How to backup these services?
Free-space optics (FSO), Radio-over-fibre (RoF) and RF/FSO Hybrid communication systems
become a solution to deploy these services on indoor/outdoor scenarios avoiding architecture
problems on WAN environments, e.g., university campus, companies’ parks [4]. Moreover, these
systems will fit emergency scenarios, e.g. earthquakes, tsunamis, where the classical
communications infrastructure cost and time replacement is very high [5]. On the other hand, the
implementation of RF/FSO or RoF systems are enclosed in the new green communications issues,
because they share the common goal to implement energy efficiency communications at anywhere
scenario [6, 7]. Therefore, emergent radio technologies and their application on FSO and RoF
systems are a challenging research issue nowadays.
(abstract = 190 words)
References:
[1] J. Perez, M. Morant, M. Beltran, and R. Llorente, "Performance of MB-OFDM UWB and
WiMAX IEEE 802.16e Converged Radio-over-Fiber in PON," Mwp: 2009 International Topical
Meeting on Microwave Photonics, pp. 235-238, 2009.
[2] J. Perez, M. Morant, R. Llorente, and J. Marti, "Joint Distribution of Polarization-Multiplexed
UWB and WiMAX Radio in PON," Journal of Lightwave Technology, vol. 27, pp. 1912-1919,
Jun 15 2009.
[3] R. Llorente, T. Alves, M. Morant, M. Beltran, J. Perez, A. Cartaxo, and J. Marti, "Ultrawideband
radio signals distribution in FTTH networks," IEEE Photonics Technology Letters,
vol. 20, pp. 945-947, May-Jun 2008.
[4] E. Leitgeb, M. S. Awan, P. Brandl, T. Plank, C. Capsoni, R. Nebuloni, T. Javornik, G. Kandus,
S. S. Muhammad, F. Ghassemlooy, M. Loschnigg, and F. Nadeem, "Current Optical
Technologies for Wireless Access," Contel 2009: Proceedings of the 10th International
Conference on Telecommunications, pp. 7-17, 2009.
[5] S. Bloom, E. Korevaar, J. Schuster, and H. Willebrand, "Understanding the performance of
free-space optics [Invited]," J. Opt. Netw., vol. 2, pp. 178-200, 2003.
[6] Z. Yi, P. Chowdhury, M. Tornatore, and B. Mukherjee, "Energy Efficiency in Telecom Optical
Networks," Communications Surveys & Tutorials, IEEE, vol. 12, pp. 441-458.
[7] R. S. Tucker, "Green Optical Communications---Part II: Energy Limitations in Networks,"
Selected Topics in Quantum Electronics, IEEE Journal of, vol. PP, pp. 1-14.
Principles of Virtual Reality In Surgical Training - Review by Sanjoy SanyalSanjoy Sanyal
This PPT was presented in 10th National Medical Dental Conference in Seychelles in February 2007. It has been reproduced on 'as is' basis. It was also presented in faculty and students's symposium in a medical school in Seychelles. Presenter is Dr Sanjoy Sanyal, (then) Associate Professor and Masters candidate in Royal College of Surgeons of Edinburgh / University of Bath
Ausgrid is investing more than $1 billion in the Sydney CBD electricity network over five years to 2014. Ausgrid's Sydney CityGrid project involves constructing new substations, replacing and upgrading high-voltage cables and constructing a new tunnel to link into our existing network of CBD cable tunnels. These tunnels connect to form an 8 km ring under Sydney's CBD that interconnects Ausgrid's substations.
To provide a GRN P-25 coverage solution into these tunnels for Ausgrid's maintenance staff presented a challenge. Coverage is provided by utilising 'radio over fibre' repeater technology which rebroadcasts the NSW Government Radio Network from two dedicated base station sites located in two of Ausgrid's substations. Radiating cable, fixed to the ceiling of the tunnel, distributes the radio signals to the user in the tunnel, providing a method of communications deep underneath Sydney's CBD, where previously there was no way of communicating with the outside world.
Steve Harvey, Engineering Manager, Distributed Coverage and Capacity Solutions (DCCS), CommScope
“Hybrid communication systems, FSO/RF and RoF: reliable and scaled communicat...Joaquin Perez
Title:
“Hybrid communication systems, FSO/RF and RoF: reliable and scaled communications anywhere”
Abstract:
Current network and telecommunication systems are required to provide higher data rates in access
networks to an increasing number of users. This fact is mainly due to the increase in the Internet
traffic data, which is related with the higher demand of online added-value online content, as a result
of a society increasingly more interconnected. New emergent radio technologies play a key role to
supply these high-demand services to customer, e.g., UWB, WIMAX and LTE-advanced. [1-3]
How to carry them to final customer? How to backup these services?
Free-space optics (FSO), Radio-over-fibre (RoF) and RF/FSO Hybrid communication systems
become a solution to deploy these services on indoor/outdoor scenarios avoiding architecture
problems on WAN environments, e.g., university campus, companies’ parks [4]. Moreover, these
systems will fit emergency scenarios, e.g. earthquakes, tsunamis, where the classical
communications infrastructure cost and time replacement is very high [5]. On the other hand, the
implementation of RF/FSO or RoF systems are enclosed in the new green communications issues,
because they share the common goal to implement energy efficiency communications at anywhere
scenario [6, 7]. Therefore, emergent radio technologies and their application on FSO and RoF
systems are a challenging research issue nowadays.
(abstract = 190 words)
References:
[1] J. Perez, M. Morant, M. Beltran, and R. Llorente, "Performance of MB-OFDM UWB and
WiMAX IEEE 802.16e Converged Radio-over-Fiber in PON," Mwp: 2009 International Topical
Meeting on Microwave Photonics, pp. 235-238, 2009.
[2] J. Perez, M. Morant, R. Llorente, and J. Marti, "Joint Distribution of Polarization-Multiplexed
UWB and WiMAX Radio in PON," Journal of Lightwave Technology, vol. 27, pp. 1912-1919,
Jun 15 2009.
[3] R. Llorente, T. Alves, M. Morant, M. Beltran, J. Perez, A. Cartaxo, and J. Marti, "Ultrawideband
radio signals distribution in FTTH networks," IEEE Photonics Technology Letters,
vol. 20, pp. 945-947, May-Jun 2008.
[4] E. Leitgeb, M. S. Awan, P. Brandl, T. Plank, C. Capsoni, R. Nebuloni, T. Javornik, G. Kandus,
S. S. Muhammad, F. Ghassemlooy, M. Loschnigg, and F. Nadeem, "Current Optical
Technologies for Wireless Access," Contel 2009: Proceedings of the 10th International
Conference on Telecommunications, pp. 7-17, 2009.
[5] S. Bloom, E. Korevaar, J. Schuster, and H. Willebrand, "Understanding the performance of
free-space optics [Invited]," J. Opt. Netw., vol. 2, pp. 178-200, 2003.
[6] Z. Yi, P. Chowdhury, M. Tornatore, and B. Mukherjee, "Energy Efficiency in Telecom Optical
Networks," Communications Surveys & Tutorials, IEEE, vol. 12, pp. 441-458.
[7] R. S. Tucker, "Green Optical Communications---Part II: Energy Limitations in Networks,"
Selected Topics in Quantum Electronics, IEEE Journal of, vol. PP, pp. 1-14.
Principles of Virtual Reality In Surgical Training - Review by Sanjoy SanyalSanjoy Sanyal
This PPT was presented in 10th National Medical Dental Conference in Seychelles in February 2007. It has been reproduced on 'as is' basis. It was also presented in faculty and students's symposium in a medical school in Seychelles. Presenter is Dr Sanjoy Sanyal, (then) Associate Professor and Masters candidate in Royal College of Surgeons of Edinburgh / University of Bath
Presentation @ MoMo Hyderabad in Decemeber. Discusses about wimax, alternatives to wimax, evolution of wimax.
This needs a In Person Presentation Support.
Definition:WiMAX is a fourth generation (4G) technology.WiMAX stands for Worldwide Interoperability for Microwave Access.WiMAX is technically also known as “IEEE 802.16”WiMAX is a wireless communications standard designed for creating Metropolitan Area Networks(MANs).A Broadband Wireless Access(BWA) technique offering fast broadband connection.It allows a user, to browse the internet on a laptop without physically connecting it to a router.It involves microwaves for the transfer of data wirelessly.Founded by Ensemble, CrossSpan, Harris & Nokia.
What is Virtual Reality?
Why we need Virtual Reality?
Virtual reality systems
Virtual Reality hardware
Virtual Reality developing tools
The Future of Virtual Reality
Redes y seguridad : un tema interesante en el que podemos basar toda la protección de tu ordenador con el que no tendrás problema a la hora de ataques de virus etc...
2. Índice.
1. Definición de red informática.
2. Tipos de redes. 2.1 Según su tamaño.
2.2 Si lleva cables.
2.3 Según su topología.
3. Elementos de una red.
4. Protocolos de Internet.
5. Propiedades de Protocolo de Internet.
6. Compartir Archivos y carpetas en Windows.
7. Compartir Impresora
8. Virus y tipos de Virus.
9. Antivirus, cortafuegos, Antispam y Antiespía.
10. Bluetooth e Infrarrojos.
3. 1. Definición de red informática.
• Es un conjunto de dispositivos
interconectados entre sí a través de un medio,
que intercambian información y comparten
recursos.
4. 2. Tipos de Redes.
2.1. Según su tamaño.
• PAN
• LAN
• MAN
• WAN
9. 4. Protocolos de Internet
4.1. Protocolo TCP / IP:
• Es que el ordenador va a tener un
determinado número y no se cambia.
4.2. Protocolo DHCP:
• Funcionamiento del protocolo de protección de
datos entre equipos de alta definición en
formatos Bluray y DVD hd.
11. 5. Propiedades del Protocolo de
Inernet.
• Dirección IP: Es un número que identifica a un
ordenador. Está formado por cuatro dígitos y
cada digito se divide en tres.
• Máscara de subred: Está formada por cuatro
dígitos y cada dígito solo puede valer 0 o 255.
El 255 de la IP significa que no varía y el 0
significa que si varía.
• Servidor DNS: Es la dirección de nuestro
proveedor de internet.
14. 8. Virus y tipos de Virus.
• ¿Qué es un virus?
- Programa de computadora confeccionado en el
anonimato que tiene la capacidad de
reproducirse y transmitirse independientemente
de la voluntad del operador y que causa
alteraciones más o menos graves en el
funcionamiento de la computadora.
15. 8. Virus y tipos de Virus
• Troyano: Nos roba información
escondido en otros programas.
• Espía: Recopila información
nuestra para pasársela a
empresas de publicidad.
• Dialers: Llamadas de alto coste.
• Spam: Correo basura.
• Pharming: Páginas web falsas.
• Phishing: Pesca de datos
mediante el correo electrónico.
17. Definiciones:
• Cortafuegos (o Firewall):Programa
informático que controla el acceso de
una computadora a la red y de
elementos de la red a la computadora,
por motivos de seguridad.
• Antispam: El antispam es lo que se
conoce como método para prevenir el
correo basura.
• Antiespía: Aplicación que se encarga de
prevenir, detectar y/o eliminar espías de
una computadora.
18. 10. Bluetooth e Infrarrojos.
• Bluetooth: Bluetooth es una
especificación tecnológica para
redes inalámbricas que permite la
transmisión de voz y datos entre
distintos dispositivos mediante una
radiofrecuencia segura
• Infrarrojos: Las redes por infrarrojos
nos permiten la comunicación entre
dos nodos, usando una serie de
LED´s infrarrojos para ello.
19. ¿Qué he aprendido?
-He aprendido lo que son las redes informáticas y
los tipos de redes que hay, sus elementos y los
protocolos que sigue.
-He aprendido lo que son los protocolos de
Internet y sus propiedades.
-He aprendido a como se comparten archivos y
carpetas en Windows, y como se comparte la
impresora entre dos o mas ordenadores.
-Y por último, he aprendido los tipos de virus y
antivirus que hay, como son y para que sirven.