Hyper Text Transfer Protocol (HTTP)

Most of us usually have been heard about HTTP but they does not know what the function it is.HTTP is the set of rules for transferring files such as text,graphic,images,sound,video,and other multimedia files on the World Wide Web.As soon as a Web user opens their Web browser,the user is indirectly making use of HTTP.HTTP is an application protocol that runs on top of the TCP or IP suite of protocols which is the foundation protocol for Internet.HTTP concepts include is the Hypertext part of the name implies the idea that files can contain references to other files whose selection will elicit additional transfer requests and handle them when they arrive.Your Web browser is an HTTP client,sending to server machine.So,thats all for today I will update for this topic in my next post.Thank you for your cooperation to read.

HISTORY OF COMMUNICATION SATELLITE

First of all,I want to share the history of communication satellite because most of us does not know how it works and who is develop this satellite communication.If i ask some question about this they do not know about it because some school does not relate this in life.

In 1962, the world's first active communications satellite, Telstar 1, was launched. This satellite was built by Telesat's predecessors at AT&T and Bell Laboratories. During seven months in operation, Telstar 1 dazzled the world with live images of sports, entertainment and news. It was a simple single-transponder low-earth-orbit (LEO) satellite, but its technology of receiving radio signals from the ground, and then amplifying and re transmitting them over a large portion of the earth's surface, set the standard for all communications satellites that followed.

Anik A

During the 1960s and 1970s, advances in satellite performance came quickly and a global industry began to develop. Satellites were mainly used at first for international and long-haul telephone traffic and distribution of select television programming, both internationally and domestically. In 1973 the Canadian Broadcasting Corporation began distributing its video programming to Canadian customers using Telesat’s Anik A satellite. Then in 1975 HBO began distributing its video programming to US customers by satellite. The commercial and technical success of these ventures led to a greater use and acceptance of satellite broadcasting. By the 1990s, satellite communications would be the primary means of distributing TV programs around the world.

Telstar

THE ADVANTAGE AND DISADVANTAGE OF COMMUNICATION SATELLITE

For this session,I would like to share the advantage and disadvantage of communication satellite.Satellite plays a very important role in telephone communication, television and radio program distribution and other certain communications.This the major field of study and has intensive literature.These communication system are now become an integral part of major area telecommunication networks through the world.The purpose of this post is to discuss various advantage and disadvantage of Satellite Communication and Service provided by Satellite.

ADVANTAGES

1. Point to multipoint communication is possible where as terrestrial relay are point to point.This why satellite relay a wide area broadcast.
2. Circuits for the satellite can be installed rapidly.Once the satellite is in position,Earth Station can be installed and communication may be established within some day or even hours.
3. During critical condition each Earth Station may be removed relatively quickly from a location and re-installed somewhere else.
4. Mobile communication can be easily achieved by satellite communication because of its flexibility in interconnecting mobile vehicles.

DISADVANTAGE

1. The satellite in position the communication path between the terrestrial transmitter and receiver is approximately 75000 km long.
2. There is delay of 1/4 sec between the transmission and reception of a signal because the velocity of electromagnetic wave. 
3. The time delay reduces the efficiency of satellite in data transmission and long file transfer,which carried out over the satellite.
4. Over crowding of available bandwidth due to low antenna gains is occurred.

Let us learn about Communication Satellite ..

Do you know what is communication satellite?Some people have been heard about this but they did not realize in daily life.So today, I want to share something information that very important in our life. Communication satellite is a satellite that has been stationed in space for the purpose of providing telecommunication.It is commonly used for mobile phone signal,weather tracking or broadcasting television programs.When you make a a long distance phone call, use a cellular phone, a fax machine or listen to radio we are probably used communication satellite,whether directly or indirectly. Furthermore, communication satellite allow radio,television and telephone transmission to be sent live anywhere in the world. Before satellites transmission were difficult or impossible at long distance. The signals which travel in straight lines,could not bend around the Earth to reach destination far away because satellite in orbit, the signals can be sent directly into space and then redirected to another satellite.

The satellite can have a passive role in communication like bouncing signals from the Earth back to another location on the Earth.On the other hand,some satellite carry electronic devices called transponders for receiving, amplifying, and rebroadcasting signals to the Earth.

ISTIGHFAR ITU ISTIMEWA..

Pernahkah anda dirundang rasa gelisah, kesedihan dan kebuntuan fikiran? Pada ketika itu apakah yang anda lakukan bagi menghadapinya? Menangis,menjerit,bermenung, dan bermacam-macam lagi yang anda boleh lakukan ketika berhadapan dengan itu.Namun, tahukah anda Allah SWT mengurniakan sejenis ubat yang mujarab bagi menghadapi rasa gelisah,kesedihan dan kecelaruan fikiran di kala kesusahan.Ubatnya sangat biasa kita dengar, tetapi jarang sekali kita ketahui akan khasiatnya yang hebat itu. Tahukah anda bahawa jiwa kita ini banyak kotorannya.Semakin hari kadar kotorannya semakin bertambah setiap kali kita membuat dosa sama ada dosa kecil ataupun besar. Dosa-dosa itu akan menjadikan hati menjadi hitam yang akhirnya menyebabkan hati menyebabkan hati menjadi tidak tenteram dan mudah dirundang rasa gelisah.Istighfar adalah cabang-cabang daripada zikir.Mungkin sebelum ini orang beranggapan istighfar ini hanya diucapkan dengan tujuan memohon keampunan kepada Allah SWT dan mencari ketenangan dalam hidup.Alasan itu memang benar.Tetapi ,hakikat yang sebenarnya terdapat banyak kelebihan istighfar kepada umat Islam termasuk insan-insan yang bergelar pelajar seperti saya.Rasullah SAW di dalam maksud hadisnya memberitahu kepada kita,orang yang banyak beristighfar akan dipermudahkan Allah SWT ketika kesempitan serta kesusahan .Misalnya,dalam maksud hadis di bawah ini.

Daripada Ibnu Abbas r.a,Rasullah SAW bersabda yang bermaksud:

“Sesiapa yang selalu beristighfar nescaya Allah akan menjadikan kemudahan pada setiap kesempitan,kesenangan pada setiap kesedihan dan memberi rezeki tanpa diduga olehnya”

(Hadis Riwayat Imam Abu Daud)

Ketika belajar anda pasti berhadapan dengan pelbagai dugaan.Terutama sekali ketika menjelangnya musim peperiksaan.Oleh yang demikian,tidakkah anda ingin dibantu oleh Allah SWT,maka perbanyakan istighfar kepadaNya dengan setulus hati dan penuh ikhlas.Serta letakkan sepenuh keyakinan kepadaNya,pertolongan Allah SWT sentiasa bersama kita.

Sebenarnya terdapat banyak lagi kelebihan istighfar.Tetapi,cukuplah setakat ini sahaja kelebihan yang saya kongsi setakat ini.Apa yang di kongsikan ini memberi manfaat kepada kita semua.