Title:Network Models

Research network models: OSI Model and TCP/IP.Provide the following:

OSI Model

Describe:

-OSI model stands for Open System Interconnection.

-A networking framework to implement protocols in layers,with control passed from one layer to the next.

-The networks divide into 7 layers.

Diagram:

OSI 7 layer:

Application:Provide access to available network resources

Presentation:Translate,encrypts and compress data

Session:Manages and terminates communicative sessions

Transport:Provides reliable process-to-process message delivery and error recovery

Network:Moves packets from source to destination providing internetworking capabilities

Data link:Organizes bits into frames providing node-to-node delivery

Physical:Transmits bits over a medium establishing mechanical and electrical specifications

TCP/IP

Describe:

-TCP/IP stands for Transmission Control Protocol/Internet Protocol.

-Set of networking protocols that allow two or more computers to communicate.

Diagram:

TCP/IP layer:

Application:Consist of applications/programs and processes that use the network

Transport:Provides end-to-end data delivery services

Internet:Defines the datagram and handles the routing of data

Link:Consist of routines for accessing physical medias

Definitions, O. and Hope, C. (2018). What is OSI?. [online] Computerhope.com. Available at: https://www.computerhope.com/jargon/o/osi.htm [Accessed 24 Apr. 2018].

vasanthimuniasamy (2013). Osi reference model. [online] Slideshare.net. Available at: https://www.slideshare.net/vasanthimuniasamy/osi-reference-model-27374402 [Accessed 24 Apr. 2018].

Study.com. (2018). Session Layer of the OSI Model: Functions, Protocols & Examples - Video & Lesson Transcript | Study.com. [online] Available at: https://study.com/academy/lesson/session-layer-of-the-osi-model-functions-protocols-examples.html [Accessed 25 Apr. 2018].

Network Topology

Define Network topology?
It is an arrangement with which computer system or network devices are connected to each other.

Six different network topologies:

• Point-to-point
• Bus topology
• Star topology
• Ring topology
• Mesh topology
• Tree topology

1. Point-to-point

Description:

When there's two devices are connected to each other.

Diagram:

Advantage:

• Fast
• No additional devices

Disadvantage:

• Maximum two devices only
• Cable breaks will affect to the whole network

          2.Bus topology

Description:

All devices share in one cable

Diagram:

Advantage:

• Easy to implement
• Less cable

Disadvantage:

• Slow connection since other computers are connect in one cable
• Others cannot connect when the cable is broken

 

        3.Star topology

Description:

All devices are connected to one hub or switch.

Diagram:

Advantage:

• Easy to manage
• Easy to detect faults

Disadvantage:

• Expensive
• More cable

     

       4.Ring topology

Description:

It past to one by one until it receive the information.

Diagram:

Advantage:

• Fast sending message
• If another host not working,can use another host

Disadvantage:

• Take time to wait 
• Its not privacy since others can read the message

   

       5.Mesh topology

Description:

Host is connected to one or multiple host.

Diagram:

Advantage:

• Faster because there are more cable
• There is many ways to send when others cable is not working

Disadvantage:

• More cable
• Expensive

     6.Tree topology

Description:

Known as hierarchical topology and most commonly use in the topology.

Diagram:

Advantage:

• Fast
• easy to identify when there's network failure

Disadvantage:

• Expensive

CN_LAN_Lab8_Nurhamizah