Nt1310 Unit 1.3 Network Analysis

1.3 How do local area networks (LANs) differ from wide area networks (WANs) and backbone networks (BNs)
Local area networks are limited within an organization
Wide area networks extend over a large geographical distance and may be privately owned or rented
Backbone network are the part of network infrastructure that feeds the connected networks

1.8 Describe the seven layers in the OSI network model and what they do.
Application – this layer is specific to applications and provides services such as email, network software services and file transfers
Presentation - In this layer, the data is formatted in a schema that network understands, and also manages data encryption and decryption
Session – this layer establishes and controls the data communication between

This provides a means of communication that can help different vendors packages to communicate and manages the message transfers from clients to servers.

2.10. Compare and contrast the three cloud computing models.
Three cloud computing models
• Infrastructure as a Service (IaaS): IaaS contains basic building blocks for cloud infrastructure and provides access to networking features, computers and data storage. This model provides highest level of control, flexibility and management over the IT resources
• Platform as a Service (PaaS): Platform as a service removes the need for organizations to manage the underlying infrastructure (usually hardware and operating systems) and allow you to focus on the deployment and management of your applications. This model helps one to be more efficient.
• Software as a Service (SaaS): This is top layer of cloud computing platform. This platform is typically built on top of a Platform as a service solution. Software as a service (Saas) provides not only hardware infrastructure but also an operating system and application program on top of that