por Victor Navarro hace 4 años
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The first division between continents was made by ancient Greek navigators, who named them 'landmass, terra firma'.
Generally classified by convention rather than any strict criteria, nowadays seven regions are regarded as continents from a geopolitical point of view.
Antarctica is not only the coldest place on Earth but also the highest, driest, windiest and emptiest, completely covered with ice.
75% of the world's ice and 70% of the Earth's fresh water is located here.
Summer months of December to February give 24 hours of light, while the winter months of late March to late September are pitch dark the whole day.
There are no permanent inhabitants, except for scientists maintaining research stations in Antarctica.
There is plenty of animal life in Antarctica. It is a continent of extreme conditions but a range of well-adapted animals thrive here at various times of the year.
Name at least 5 of these animals.
Antarctica sees half a year of light and half a year of complete darkness.
Write down which months give 24 hours of light, and which are the ones that give pitch darkness the whole day.
The coldest natural temperature ever recorded on Earth was recorded here.
Write it down.
Write down the temperatures of the Frozen Continent during the summer and the winter.
North America has five time zones and it is the only continent with every type of climate.
North America was named after the explorer Amerigo Vespucci and is also known as the 'New World'.
The world's largest sugar exporter among the seven continents - Cuba - also called the 'sugar bowl of the world' is located here.
Cierre
Fin de la conexión por parte del cliente y el servidor.
Respuesta
Envío por parte del servidor de una respuesta al cliente.
Solicitud
Envío por parte del cliente de un mensaje de solicitud al servidor.
Establecimiento de una conexión del cliente con el servidor. El puerto TCP/IP 80 es el puerto más conocido, pero se pueden especificar otros puertos no reservados.
Proxy
Se trata de un programa intermedio que actúa sobre el servidor y el cliente Así, pues, el protocolo HTTP se basa en la conexión entre cliente y servidor.
Servidor
Es el programa que presta el servicio en la red
Cliente
Es el programa que hace la llamada al servidor y es el que atiende en la transmisión la trama de los mensajes
Mensaje
Es la unidad básica de un protocolo HTTP y consiste en una secuencia estructurada que se tramite entre los programas
Conexión
Es el circuito virtual establecido entre 2 programas en una red de comunicación
The specialty of some animals is they are found only in a particular region and nowhere else in the world. North America is home to many of such amazing animals.
Name at least 6.
Native Americans have lived along this river and its tributaries for thousands of years. Most were hunter-gatherers, but some formed agricultural societies.
Formed from thick layers of the river's silt deposits, this river's embayment is one of the most fertile regions of the United States; steamboats were widely used in the 19th and early 20th centuries to ship agricultural and industrial goods.
Name this river.
The world's largest freshwater lake by surface area and the third-largest freshwater lake by volume can be found here. It provides a route for the transportation of iron ore, as well as grain and other mined and manufactured materials.
Large cargo vessels called lake freighters, as well as smaller ocean-going freighters, transport these commodities across this lake.
Name this lake.
There are 23 countries that make up North America.
Name as many of you can! Don't forget about their capitals.
You can find on this continent:
There are 12 countries that make up South America.
Name as many of you can! Don't forget about their capitals.
Asia is the world's largest continent of the seven continents in size, as it covers one-third of the earth's surface.
It includes 50 countries, and it is the most populated continent, 60% of the total population of the Earth lives here.
Name as many as you can out of the 48 countries located in Asia.
Write down the capitals too.
Europe is separated from Asia by the Ural mountains and the Caspian Sea.
It is surrounded by water on three sides: Mediterranean Sea in the south, Atlantic Ocean in the west, and the Arctic Ocean in the north.
Three-fourth of the world's potatoes grow in Europe.
Intercambiar o descargar información con programas como eMule o BitTorrent, enviar archivos por FTP o compartirlos a través de Dropbox o Google Drive.
Escuchar la radio en directo, ver programas de televisión, leer la prensa,...
Para establecer relaciones sociales como Facebook, Twiter, Instagram,...
Mediante chats, foros o videoconferencia.
Existen páginas y redes sociales que ponen en contacto a los usuarios con las empresas, como infojobs.net o linkedin.com
Algunas administraciones públicas, como la Agencia Tributaria, los ministerios o el BOE ofrecen servicios al usuario. Para ello es a menudo necesario un certificado o DNI electrónico.
Cursos on-line.
Es la compraventa de productos o servicios a través de internet. El pago se puede realizar contra reembolso, por transferencia, con tarjeta de crédito o a través de PayPal. Conviene utilizar un sistema de pago seguro que incluya confirmación por teléfono móvil.
Europe is a large region, with several major rivers that connect its many countries. There are five primary rivers in Europe, and one of them flows through 10 countries, more than any other river in the world.
Name these rivers.
Europe is one of the smallest continents, yet it is home to some of the largest mountain ranges.
About 20% of the total landmass of the continent is considered mountainous.
Name the 5 longest mountain ranges in Europe.
The most beautiful cities in the world can be found in Europe. History, architecture, arts, and famous cuisine is representative almost to each country.
Out of 51 countries how many you can name?
And how many capitals?
Mediante un navegador se accede a una página web en la que se puede consultar el correo on-line, es decir, con conexión a internet sin necesidad de descargarlo en el ordenador.
Los mensajes recibidos se almacenan en el servidor hasta que nos conectamos, momento en el que podemos descargarlos en nuestro ordenador y no necesitamos estar constantemente conectados para consultarlos. Necesitamos conocer cuál es el servidor de correo saliente (SMTP), para poder enviar mensajes, y cuál es el servidor de correo entrante (POP3) para poder recibirlos.
