Network Laye

The network  layer provides  communication  between the multiple networks. Whereas the  data link  layer provides the  communication between  two systems on the same  network of two systems are connected to the same link  there is usually more need for a network layer. However if the systems are attached to the different networks ( links) with connecting devices there is often  a need for the network layer to accomplish sources to destination delivery. It defines addressing and routing ( logical link) between sources and  destination. This  layer also makes sure  that data packets are transmitted across the  networks correctly.Other  responsibilities of the network  layer include the followings.

• Logical addressing. The physical addressing implemented by the data link layer handles the addressing problems locally. If a packet passes the network boundary we need another addressing systems to help distinguish the source and destination systems. A header to the packet coming from the upper layer the among other things includes the logical addresses of the sender and receiver.
• Routing. When independent networks or links are connected to create internet works of a large network the connecting devices ( called routers or switches) route or switch the packets to their final destination. One of the functions of the networks layer is to provide this mechanism.

 

 

Posted Date: 3/2/2013 6:36:11 AM | Location : United States

Ask an Expert

Related Discussions:- Network laye - fundamentals of networks , Assignment Help, Ask Question on Network laye - fundamentals of networks , Get Answer, Expert's Help, Network laye - fundamentals of networks Discussions

Write discussion on Network laye - fundamentals of networks
Your posts are moderated

Write your message here..

Related Questions

Interconnection networks and sorting, As in PRAM, there was no direct commu... As in PRAM, there was no direct communication medium among the processors, therefore another model called as interconnection networks have been designed. In the interconnection net

Show the class A addresses, Q. Show the Class A Addresses? Class A Add... Q. Show the Class A Addresses? Class A Addresses Numerically the lowest Use merely one byte to identify the class type and netid Three bytes are obtainable

Identify three udp characteristics, UPD is a layer 4 Transport protocol. It... UPD is a layer 4 Transport protocol. It is connection-less due to it does establish a connection thus the 3 step handshake is not needed, it does NOT execute any flow control or ac

What is feasibility condition (fc), What is Feasibility condition (FC)? What is Feasibility condition (FC)?

What is source routing, Q. What is Source Routing? Source Routing ... Q. What is Source Routing? Source Routing - Sender of packet defines bridges and routes that packet should take - Complete path of bridge IDs and destination address i

Explain the term hardware cost, Hardware Cost It indicates to the cost ... Hardware Cost It indicates to the cost concerned in the functioning of an interconnection network. It comprises the cost of arbiter unit, connectors, switches, interface logic

Physical layer responsibilities of osi model, Q. Physical Layer Responsibil... Q. Physical Layer Responsibilities of osi model? - Physical characteristics of interfaces as well as media - Representation of bits with no interpretation - Data rate is

Define decoder, Define Decoder? A device or program that translates enc... Define Decoder? A device or program that translates encoded data into its original format (e.g. it decodes the data). The term is often used in reference to MPEG-2 video and so

Describe the depth penetration method for a crt, Question: (a) What do ... Question: (a) What do you understand by the following terms related to LCDs: Reflective LCDs Backlit LCDs (b) By using an example, explain the main steps of the B

Enumerate about the traffic policing, Enumerate about the Traffic policing ... Enumerate about the Traffic policing Traffic policing happens when a flow of data is regulated so that cells (or frames or packets) that exceed a performance level are discarde