What are the four basic procces of network layers?

Answer 1

1. packet ia addresed to proper destination.

2. packet is encapsulated with necessary data to deliver.

3. packet is routed through web of networks that can deliver it.

4. finally destination decapsulates it.

Answer 2

Functions of the Network Layer include:

• Connection model: connectionless communication

For example, IP is connectionless, in that a frame can travel from a sender to a recipient without the recipient having to send an acknowledgement. Connection-oriented protocols exist at other, higher layers of that model.

• Host addressing

Every host in the network needs to have a unique address which determines where it is. This address will normally be assigned from a hierarchical system, so you can be "Fred Murphy" to people in your house, "Fred Murphy, Main Street 1" to Dubliners, or "Fred Murphy, Main Street 1, Dublin" to people in Ireland, or "Fred Murphy, Main Street 1, Dublin, Ireland" to people anywhere in the world. On the internet, addresses are known as Internet Protocol (IP) addresses.

• Message forwarding

Since many networks are partitioned into subnetworks and connect to other networks for wide-area communications, networks use specialized hosts, called gateways or routers to forward packets between networks. This is also of interest to mobile applications, where a user may move from one location to another, and it must be arranged that his messages follow him. Version 4 of the Internet Protocol (IPv4) was not designed with this feature in mind, although mobility extensions exist. IPv6 has a better designed solution.

Answer 3

Packet is addressed to the proper destination, packet is encapsulated with necessary data for delivery, packet is routed through the web of networks that will deliver it, and finally, the destination host decapsulates the packet for processing.

Answer 4

The four main processes at the network layer are addressing, encapsulation, routing, and decapsulation.

Answer 5

Layer 3 uses four basic processes:

Addressing

Encapsulation

Routing

Decapsulation