IT Operations Flashcards
OSI model
All communication over a network expressed in 7 layers. Top 5 handled by OS, bottom two by network.
T-lines
Data transmission tech over fiber. T1 up to 1.544mbps T3 up to 45mbps
Client server architecture
Client computers rely on services or data provided by a server.
TCP
Transport layer of OSI. Guaranteeing data is received in the correct order.
IP
Protocol used at network layer of OSI. Finding best path, sending messages in packets and reassembled when received.
DNS
Domain name service. Resolves names into IP addresses that networks can understand.
Mainframe
Large scale server that supported multiple computers simultaneously. Parts are redundant and hot swappable.
Domain controller
Server that controls user account info, authenticates and enforces security and access control.
Active directory
Microsoft database that let’s admin control user access to network resources. Contains Users, groups, computers.
Infrastructure as a service
Hosts hardware remotely for cloud computing.
Platform as a service
Hosts hardware and OS remotely for cloud computing.
Software as a service
Software delivery method where hardware and software are stored remotely.
Virtualization
One physical machine hosts multiple activates usually implemented on one machine.
Terminal services
Apps or desktop are made available to user from a remote server. Processing takes place at the server.
SQL
Structured query language. Used to manage data and databases.
