Skip to main content

Osi model

NETWORK TECH WORLD

 OSI Model

The OSI (Open Systems Interconnection) model is a framework used to understand how communication occurs between different devices on a network. It consists of seven layers, each of which has a specific function:

Physical: This layer deals with the physical aspects of communication, such as cables, switches, and routers.

Data Link: This layer is responsible for establishing a link between devices and providing error-free transmission of data across a network.

Network: This layer is responsible for routing data packets between devices on a network.

Transport: This layer provides end-to-end communication between devices, ensuring that data is delivered reliably and in the correct order.

Session: This layer establishes, maintains, and terminates connections between devices on a network.

Presentation: This layer is responsible for translating data into a format that can be understood by the application layer.

Application: This layer provides the interface between the network and the end user, allowing applications to send and receive data over the network.

Each layer communicates with the layer above and below it using a set of standardized protocols. This allows devices from different manufacturers to communicate with each other, as long as they adhere to the same standards.

Comments

Post a Comment

Popular posts from this blog

What is network

NETWORK TECH WORLD What is network  A network is a group of devices, such as computers, servers, and printers, that are connected together and able to communicate with each other. Networks can be classified based on their size and scope, such as a local area network (LAN), which is a network that is confined to a small area, such as a single building or campus, or a wide area network (WAN), which is a network that spans a large geographical area, such as a city or a country. Networks can also be classified based on their communication protocols, such as the Internet, which is a global network that uses the Internet Protocol (IP) to connect devices around the world.
Post a Comment
Read more

VPNs And Security

VPNs And Security VPNs and You On today’s Internet, security is a major concern. From wanting to protect financial transactions to simply wishing to browse without every site you visit being scrutinized, there are a lot of reasons to wish for privacy and protection. One of the simplest, yet all-around strongest ways in which to protect your Internet habits is through the use of a VPN. They usually have a monthly subscription fee associated with them but if security is important to you, then there’s no cheaper way to secure your Internet connection. On top of that, there are various options, with quick installs, or even more complicated, option-laden pieces of software which allow for more customizability in what your specific needs may be. A VPN is defined as a virtual private network. This effective creates a private network across a public space like the Internet. These connections are secured and encrypted, thus allowing for safer browsing experiences. Not o...
Post a Comment
Read more

Network Devices

NETWORK TECH WORLD A network device is a hardware device that helps to connect a computer or other devices to a network. There are several types of network devices, including: Routers: These devices route data packets between different networks. Switches: These devices allow multiple devices on a network to communicate with each other by forwarding data packets to the intended recipient. Hubs: These devices are similar to switches, but they do not filter the data packets based on the destination. Instead, they broadcast the data packets to all devices connected to the hub. Bridges: These devices connect two different networks and allow data packets to be transmitted between them. Modems: These devices allow computers to connect to the internet by converting data into a format that can be transmitted over a phone line or cable connection. Firewalls: These devices protect a network by blocking unauthorized access and monitoring traffic for any malicious activity. These are just a few exa...
Post a Comment
Read more