INSY 3303 Exam 1 Questions and Answers Already Passed

INSY 3303 Exam 1 Questions and Answers Already Passed Three basic components of a network: A server, client, and a circuit. What is a client? Is the inout-output device at the user end. (I.E. clients computer) What is a circuit? It is the pathway through which a message (data) travels. Think everything in-between the server and client, connects them together. What is a server? Typically servers provide some service for the clients. (data access, application logic, etc) Types of networks: LAN(local area network) - is a group of computers located in the same general area. Backbone Networks - larger, central networks connecting several LANs, other BNs, and WANs. Typically span 100's of feet to several miles. WAN(wide area networks)- connect BNs and MANs (metropolitan area networks). typically span hundreds or thousands of miles. Intranets- Is a LAN that uses the same technology as the internet but is only available to those inside the organization Extranets- Use the same technology as the internet, but provided to invited users Two most important network models: OSI (open systems interconnection reference) Internet model Internet Model Most commonly used model of the two. Its the network model that dominates current hardware and software. Simple five layer Collapses the top three layers of the OSI model into one layer. ( application layer, presentation layer, and session layer collapses down into the application layer.) Internet Model Layers 1. Physical Layer 2. Data Link Layer 3. Network Layer 4. Transport Layer 5. Application Layer OSI Model the framework of standards for computer to computer communications. replaced by internet model, never caught on. OSI Model Layers 1. Physical layer 2.Data Link Layer 3.Network Layer 4.Transport Layer 5.Session Layer 6.Presentation Layer 7.Application Layer Physical Layer is the physical connection between the sender and receiver. Includes all hardware devices specifies the type of connection and the signals/radio waves/or light waves that pass through it. Role is to transfer series of signals through the circuit. Data Link Layer responsible for moving a message from one computer to the other in the network path (sender to receiver). Controls physical layer by deciding when the physical layer will transmit messages. formats messages