INSY 3303 Exam 1 Questions & Answers 2024/2025
Three basic components of a network: - ANSWERSA server, client, and a circuit.
What is a client? - ANSWERSIs the inout-output device at the user end. (I.E. clients computer)
What is a circuit? - ANSWERSIt is the pathway through which a messa...
Three basic components of a network: - ANSWERSA server, client, and a circuit.
What is a client? - ANSWERSIs the inout-output device at the user end. (I.E. clients computer)
What is a circuit? - ANSWERSIt is the pathway through which a message (data) travels. Think everything
in-between the server and client, connects them together.
What is a server? - ANSWERSTypically servers provide some service for the clients. (data access,
application logic, etc)
Types of networks: - ANSWERSLAN(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: - ANSWERSOSI (open systems interconnection reference)
Internet model
,Internet Model - ANSWERSMost 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 - ANSWERS1. Physical Layer
2. Data Link Layer
3. Network Layer
4. Transport Layer
5. Application Layer
OSI Model - ANSWERSthe framework of standards for computer to computer communications.
replaced by internet model, never caught on.
OSI Model Layers - ANSWERS1. Physical layer
2.Data Link Layer
3.Network Layer
4.Transport Layer
5.Session Layer
6.Presentation Layer
7.Application Layer
Physical Layer - ANSWERSis 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 - ANSWERSresponsible 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 by indicating where they start and end.
detects and may correct errors that occurred during transmission.
Network Layer - ANSWERSPerforms routing, selects the next computer to which the message should be
sent.
finds the address of the computer (receiver) if it is unknown
Transport Layer - ANSWERSResponsible for linking the application layer software to the network and
establishing end to end connection between the sender and receiver.
responsible for breaking long messages into several smaller ones, and then reassembling them into the
original one at receiving end.
Application Layer - ANSWERSIt is the users access to the network.
user defines what messages are sent over the network.
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