Domain Name System (DNS): A global and highly distributed network service that resolves strings of letters, such as a website name, into an IP address
Intranet: An internal network inside a company, accessible if you are on a company’s network
NTP: Network Time Protocol, keeping clocks synchronized on machines connected to a network
Proxy server: An intermediary between a company's network and the Internet, receiving network traffic and relaying that information to the company network
Server operating systems: Regular operating systems that are optimized for server functionality
C
Cloud computing: The concept and technological approach of accessing data, using applications, storing files, etc. from anywhere in the world as long as you have an internet connection
D
Data center: A facility that stores hundreds, if not thousands of servers
Deployment: Hardware is set up so that the employee can do their job
I
IT Infrastructure: The software, the hardware, network, and services required for an organization to operate in an enterprise IT environment
K
KVM Switch: Keyboard, video, & mouse switch that looks like a hub that you can connect multiple computers to and control using one keyboard, mouse, and monitor
M
Maintenance: Where software is updated and hardware issues are fixed if, and when, they occur
P
Procurement: Hardware is purchased or reused for an employee
Production: The parts of the infrastructure where certain services are executed and serve to its users production
R
Reproduction case: Recreating an error to test a solution to make sure the problem is gone after a fix has been applied
Retirement: Hardware becomes unusable or no longer needed, and it needs to be properly removed from the fleet
Rollback: Reverting to the previous state before you made changes
S
Secondary or stand-by machine: A machine that is the same as a production machine, but won't receive any traffic from actual users until enabled
Server: Software or a machine that provides services to other software or machines
System Administration: The field in IT that is responsible for maintaining reliable computer systems, in a Multi-user environment
T
Test environment: A virtual machine running the same configuration as a production environment, but isn't actually serving any users of the service
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