S2 M1 Flashcards
What is IT infrastructure
Multiple, interconnected, technological, components
What is computer hardware
computers, physical components that comprise computers, and external devices
EX: laptops, desktops, servers, switches
What are End user devices (EUD)
Electronic machines which directly interact with a human
EX: computers, wearables, tablets
What is infrastructure housing
Facilities and safeguards on those facilities that contain hardware
Modems
Connect a network to a service provider’s network (brings internet into a home or office)
Routers
Manage network traffic by connecting devices to form a network
Switches
Connect and divide devices within a network
Splits the signal so multiple devices can share one network
Gateways
Acts as an intermediary between different networks
Edge-enabled devices
Allows for computing, storage, and networking functions closer to the device where the data or request originates from
Results in faster response times since data does not have to be transmitted to a remote location
Servers
Physical or virtual machines that coordinate the computer, programs, and data that are apart of the network
Firewalls
Intended to prevent unauthorized access into the organization and prevent employees from downloading malicious programs
Types of network topology
Bus - either linear or tree form with each noted connected to a single line
Mesh - numerous connections between nodes
Ring - Nodes connected in a circular path
Star - Data passes through a central hub that acts as a switch or server
What are the 7 layers in the open systems interconnection (OSI) model and briefly describe each one
Application - Serves as the interface between applications and network protocols
Presentation - Transforms data received from the application layer into a format or “presentation” that other devices can interpret
Session - Allows sessions or “dialogue” between devices to be established and maintained”
Transport - Supports and controls the communication between devices
Network - Adds routing and addresses to the data so the message reaches the correct device
Data Link - Data packets are formatted for transmission
Physical - Converts message sent from data link layer and converts it into bits so it can be transmitted to physical devices
Local area networks (LANs)
Provides network access to a limited geographical area
Wide area networks (WANs)
Provides network access to larger geographical areas
