Network service model - network layer and routing, Computer Networking

Assignment Help:

Network Service Model

The network  service  model  defines  the characteristics of end to end  transport of data between  one edge of the  network  to the  other  that is between  sending  and receiving end  systems.

Lets now  consider  some  possible  services  that the  network  layer  can provide. In the sending  host when  the transport  layer passes a packet to the network  layer  specific services that  could be provided by  network  layer  include:

a.This  service  guarantees that the  packet will eventually arrive at tits destination.

b.Offers uniform  services  various types  of sub network . the sub network  may be defined as a set  of one  or more  intermediate nodes  which  are used  for establishing network  connection between  end systems and provide  routing  and  relaying of frames thought  it.

c.Offers  uniform  addressing and services to LAN and WAN the  network  layer defines  network  addresses which  are being  used by transport enmities to access network services. Each transport entity is a unique network connection end point  identifier  defined by the  network  layer  which  may be independent of addressing required by underlying layer. The  network entities define network  connection and  may also include intermediate nodes which  usually  provide  relaying. The network  connection   over intermediate subnets is known  as a subnet connection and is usually  handled by  underlying protocols.

d.Establishes  control and maintains  a logical  connection between  the transport  layer  entities for exchanging the data  across the network. The network  connection offers  point to point  connection and more than one  network connection may  be defined between  the same  pair of network  addresses. The network  service data units  are transferred transparently between transport  entities over the network connection  and generally do not have  upper  limit  on their  size.

e.The transport  layer can adapt to different types  of sub network  ( it is  independent  of the characteristics of sub network e, g routing  strategies considered topologies and type of the sub network).

f.Offers an acceptable quality of services during  the network  connection  which  in turn  is based on parameters such as residual error rate service availability  throughput reliability etc. It also reports any undetectable error  to the transport layer.

g.Provides sequencing for NDSU over the  network  connection when  requested by transport  entities.

h.Provides both  connection oriented  and connectionless services to the  users.

In connection oriented services a logical connection is set  up between  two transport entities including agreement for the  type of service desired parameters cost priorities transfer of  data in both direction with  appropriate flow control  and finally the termination of the  connection.

On the other  hand  in connectionless service network  layer primitives SEND  and RECEIVE are being  used to  send and receive the packet across the networks. The  users  are responsible for flow  control  and error  control  on their  hosts.


Related Discussions:- Network service model - network layer and routing

Microwave applications, Q. Microwave Applications? - Unicasting - one-t...

Q. Microwave Applications? - Unicasting - one-to-one communication among sender and receiver - Cellular phones - Satellite networks - Wireless LANs

Determine about the proxy servers, Determine about the proxy servers T...

Determine about the proxy servers There are proxy servers that act as good firewall protection for the entire Intranet system. In some cases, firewall comes as a separate serv

What does the user datagram protocol (udp) , UDP is connectionless, and doe...

UDP is connectionless, and does not give error checking. But remember, error checking can happen at other layers too.

Set up to use pvm run and complie, PVM uses two environment variables when ...

PVM uses two environment variables when starting and running. Every PVM user needs to set these two variables to use PVM. The initial variable is PVM_ROOT, which is set to the loca

Wlan technology, Identify and briefly explain any four key requirements tha...

Identify and briefly explain any four key requirements that need to be examined when considering deploying a WLAN technology.

What do you understand by protocol, Q. What do you understand by Protocol? ...

Q. What do you understand by Protocol? Ans:  In the context of data networking, a protocol is a formal set of rules and conventions that governs how computers interchange infor

Tcp – numbering bytes, Q. TCP – numbering bytes? Numbering is utili...

Q. TCP – numbering bytes? Numbering is utilized for flow & error control Segments aren't numbered only bytes Full-duplex connection - numbering is independent in

Illustrate addressing, Addressing Complicated addressing scheme because...

Addressing Complicated addressing scheme because there may be intermediate stations (APs), identified by flags

Comparing transport for tcp/ip and osi model, Q. Comparing Transport for TC...

Q. Comparing Transport for TCP/IP and osi model? - The features of TCP and UDP defined at TCP/IP Transport Layer correspond to many of the requirements of the OSI Transport Lay

State the types of performance of computer hardware, State the types of per...

State the types of performance of computer hardware The hardware, i.e., the server or computer has a direct relationship on performance in the following areas: Reliabili

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd