We are all familiar with Windows. This is the operating system, the first and main set of programs loaded into the computer. Network devices such as switches, routers etc are using their operating system. It is called the Internetwork Operating System (IOS). With IOS, we set up and configure devices. We enter the commands for this on the command line (CLI). It can be accessed via a console port, a secondary port, or via Telnet or SSH.Cisco Packer tracer is a network simulation of data transmission. In many cases, we practice there. I did basic router configuration, set up passwords and banner and set up ip addresses. I would not have done without the PuTTy program. PuTTy allows you to connect and manage a remote node, that is, a terminal emulator.
⠀Network Layer
⠀Below the transport layer is the network layer. Network layer protocols define the addressing and processes that enable the packaging and transmission of transport layer data. To ensure data transfer it uses four main processes:
- IP addressing
- Encapsulation
- Routing
- Deencapsulation
A common network layer puncture at the moment is IPv4. But because it has a limited number of unique addresses (4.3 billion addresses) and there are more and more devices in the world, A new IPv6 Protocol has been developed. With IPv6, you can create 340 undecillions of addresses ( this number is 340 followed by 36 zeros). IPv6 is the future. To us slowly comes such a thing as Internet of Things. The Internet of things (IoT) is a global network of physical devices connected to the Internet – “things” equipped with sensors, sensors and information transfer devices. That’s where we need IPv6 addresses.
⠀I’ll see you in the next post.
Computer Networks 