PC Networking

What is WAN (Wide Area Network)?

A wide area network, WAN, is a network established for the communication of more than one device in a wide area. It covers a much larger area and often a lot more devices than a LAN connection. 

The most popular of this network, which covers cities and even countries, is the Internet. In general, most WANs are connected to the Internet. However, in some special cases, private WAN can be used.

We can think of WAN connections as a combination of LAN connections. Local links join together to form larger-scale connections.

However, when making this combination, connections such as link antennas, gateways, satellite connections are required. As with other network types, the most basic usage purposes are data sharing. To be more precise, it is to facilitate and speed up data sharing

Otherwise, data transfer was provided before these network systems. Data transferred with different external devices can now be transferred with the help of a single button.

One of the disadvantages of the Wide Area Network is that it is usually a little slower than the Local Area Network. The most important reason for this is the high number of users. In the Local Area Connection (LAN), there is a more limited number of users and naturally a more limited operation.

However, the same is not the case for WANs that are installed in a very large area. The more users and transactions are made, the more the system slows down. There are various solutions to these slowdowns. You can increase the user capacity of the network by increasing the bandwidth. However, it is difficult to reach any LAN connection speed.

More Podcasts

What is Local Area Network (LAN)?

The communication system in which more than one machine is in direct connection with each other without external connections is called the Local Area Network (LAN). Devices connected to a modem or router can be defined as a local network, as well as networks where thousands of machines are installed on the patch bay. While local networks can be completely closed to the outside, it can be ensured that the internet backbone and the internal network are used together by making the necessary configurations. IP addresses reserved in the LAN can communicate with each other using different network protocols. The most common LAN protocol is the TCP/IP protocol, which is also used by the internet backbone.

History of Local Networks

The invention of the Internet begins with a local network established by the US Department of Defense. Later, the USA, which established a public network called Intranet, builds all government services on this network and develops a system on which the whole nation can communicate. After seeing that this system is a system that will globalize in a short time, the rapidly changing system of our global-local network; that is, it enables the internet to emerge. So the internet is a huge local network.

In the usual sense, LAN is named as the connection made by cable. This definition is not entirely wrong. LAN connections are a network formed by many devices that reach network interfaces with special sockets. Although Wi-Fis are more stable than networks, they cannot be separated from where they are connected. For this reason, their names are called Local Network. However, nowadays, with wireless communication protocols, wireless installation of local networks is possible. For example, other machines in a public institution that connects to the wi-fi server via wireless network cards can create a wireless local network.

What is the Role of Local Networks?

The local network is a mandatory system to access the public network. For example, the modem installed in our house is a gateway. The machines inside the house; In other words, it provides the connection of the users connected to the local network to the outside, to the internet. In short, it is not possible to connect to the outside without a local network. Only mobile devices appear to be able to connect directly to the internet, but that isn't exactly the case here either. Each mobile phone receives IP from the base station to which it is connected, and this base station is a local gateway. Since only addressing is made independently, users connected here cannot be connected using local network protocols.

Local networks created in wired or wireless form; It is interconnected with its network tools without incurring communication charges and can perform all operations synchronously. Networked users can use a common device; For example, you can use the printer, access each other's memories, and even establish a network managed from a single center. In many public institutions, this is how the machines work. As a comprehensive example; it can be shown that banks have internal local networks closing the whole country.

More Podcasts

The development of the concept of computers in the 1950s brought the data transfer between devices into the agenda. Package designs in the digital network were developed in laboratories in France and England, especially in the USA. While the history of the Internet started in this way, the US Department of Defense started to use the first protocol, ARPANET. The first message sent over this network was sent to the computer of a professor at the University of California in Los Angeles.

As a result of the development work carried out in 1981, ARPANET was given a structure that can be connected to larger networks. Although telex machines used in the 19th century were among the pioneers of digital communication, this was developed in the early 20th century in a modern sense. The first computers that shared networks could allow data flow at the level allowed by the technology of the era, that is, only over two points between the main computers.

Over time, this system has also been developed and the importance of the distance between the main computer or terminals has disappeared. With the discovery of high connection speed, the history of the internet is carried to a different dimension. File sharing between two devices can now be done easily. However, the main problem that arises in this situation is the possibility of damage to the physical network that will provide data flow between two points. The concept of the Internet was pronounced in the TCP protocol by Vint Cerf and Bob Kahn for the first time in history.

The system, which facilitates access to information by combining all networks around the world, was further developed between 1973 and 1980. As of January 1, 1983, ARPANET announced that every device connected to the network must accept the Communication Control Protocol. Shortly after this protocol that laid the foundations of the Internet, especially gov., Com, Edu. An article has been published that talks about extensions such as The article was published by the IETF and the history of the internet has thus entered a new era.

The years 1990 and 1995 were the years when important breaks were experienced in terms of the digital networks. ARPANET in 1990 and another digital network service provider, NFSNET, are now out of date. The "world wide web" that we all know as "www", which comes from the city of CERN in Switzerland, was now providing access to the digital network even at homes. This system, which was a revolution around the world, now allowed many people to benefit from social networks and online shopping.

More Podcasts

What is Ubuntu?

Ubuntu is an open-source, free, and free operating system based on the Linux kernel. You can download Ubuntu and install it on your computer using a USB stick or DVD.

The first stable desktop version of Ubuntu was released in 2004. It has variants developed for the internet of desktop, server, cloud, and objects. Today it is used in tens of millions of desktop-laptop computers and hundreds of millions of devices.

Who is it being developed by?

Ubuntu project, Canonical Ltd., founded by South African entrepreneur Mark Shuttleworth for this purpose, to make Linux and free software a part of the daily life of computer users company was started in 2004.

Ubuntu is currently developed by Canonical and the volunteer Ubuntu community, again under the direction of Mark Shuttleworth.

Is it paid?

No, Ubuntu is completely free to download and use for both home and business use. You can install and use Ubuntu on as many computers as you want without any license restrictions. You also do not pay any fees for published updates and upgrades.

Canonical Limited promises to keep Ubuntu always free.

Aside from the promise, codes developed within Ubuntu are licensed under a free software license called the GNU General Public License.

This license is not an obstacle or an opposition to Ubuntu being paid, but under the license, the codes are owned by everyone, like a public domain.

Canonical has only brand rights to Ubuntu. Let's face it unexpectedly that Ubuntu has become paid one day in the future, even in this case, since the source codes belong to everyone, any person, community or organization can copy and maintain it under a different name and distribute it for free, by copying the existing codes of Ubuntu.

Canonical is not from the sale of the Ubuntu operating system; It generates income from the sales of various administrative software developed for cloud and server systems from organizations that want to get professional support in the use of derivatives such as cloud, server, and desktop.

More Podcast