Question

is the concept of layer is very hard to understand true or false​

Answer 1

Layering concept

Explanation:

• The Internet is made possible via network-to-network connectivity. The "network layer" is the element of the Internet communications process that establishes these connections by transferring data packets back and forth between networks.
• The network layer is layer 3 in the seven-layer OSI model
• One of the principal protocols used at this layer is the Internet Protocol (IP), which is joined by numerous other protocols for routing, testing, and encryption.
• Let's say Bob and Alice are both connected to the same LAN and Bob wishes to send Alice a message. Because Bob and Alice are on the same network, he may transfer it immediately to Alice's computer.
• Bob's message will have to be addressed and sent to Alice's network before it can reach her computer if she is on a different LAN several miles away.
• A network is a collection of two or more computing devices that are linked together. Typically, all network devices are connected to a central hub, such as a router. Subnetworks, or smaller subdivisions of a network, are also possible.
• Subnetworking is a technique for managing thousands of IP addresses and associated devices on very large networks, such as those offered by ISPs. The network layer is where everything that has to do with inter-network connections happens.
• Setting up data packet routes, checking to verify if a server on another network is up and running, and addressing and receiving IP packets from other networks are all examples of this.
• Because the great bulk of Internet traffic is sent through IP, this last procedure is likely the most significant. All data sent over the Internet is divided into "packets," which are smaller bits of data.
• When Bob sends Alice a message, for example, the message is disassembled and then reassembled on Alice's computer.
• A packet is made up of two parts: the header, which provides information about the packet, and the payload, which contains data about the payload itself.