CH11- Network Operating Systems Intro Flashcards
Who has access to the network: login, username, password
Authentication
Granting authenticated users access to resources
Authorization
Process where the hypervisor implements virtualization by running on the host computer and controls guest computers
bare-metal Virtualization
Text file containing a list of commands, usually from the command line
Batch file
An organization’s data is stored off-site on servers of a Host company.
Cloud storage
Process where the OS suspends a task to activate another
Context switching
Where the OS can’t stop a process until it is finished and gives control back to the CPU
Cooperative-multitasking
Group of sectors
Sectors are the smallest space occupied by a file
Disk Cluster
Server cluster configuration used for fault tolerance in case of server failure another takes over immediately
Fail over cluster
Method where OS stores files on a storage device.
File system
Operating system installed on a virtual machine
Guest OS
Physical computer where the virtual software is installed
Host computer
Where hypervisor implements OS virtualization by being installed on general host OS. The host OS accesses host hardware for guest computer
Hosted virtualization
Computer device that can be removed/added while computer/server is running
Hot swappable device
Component of virtualization software that creates the virtualization hardware environment, allowing VM’s to share hardware
Hypervisor
Server cluster configuration that spreads the work among multiple computers
Load balancing cluster
Commands typed into a file that run when a user logs on
Logon script
Scalable-flexible WAN tech that works with any network layer protocol and is independent of data-link layer. Used exclusively in IP networks.
Multi protocol label switch (MPLS) - creates connection-oriented virtual circuits assigning labels to each packet
Allows 2 or more threads to run concurrently on sep CPU or cores
Multi-processing
equipped with specialized software performing limited tasks. Packaged with video interfaces so don’t use a keyboard monitor
Network appliance
Dedicated server device for shared storage for network users
NAS (network attached storage)
Multitasking where OS controls which process gets access to CPU and for how long
Pre-emptive multi-task
Program loaded into memory and run by CPU
Process
OS client component that intercepts resource requests to determine if it’s local or remote
Redirector
Storage configuration of 2+ disks in a fault tolerance arrangement so data can be preserved and operate
RAID (Redundant Array of Independent disks)
2+ server configured to operate as a single unit: fail over and load balancing clusters
Server cluster
Process running in the background providing services to other processes
Service - ex. DSN client
partial copy of a VM made at a particular moment and used to restore the VM to the snapshot state
Snapshot
High-speed, high-cost network storage replacing locally attached drives and servers
SAN (Storage Area Network)
Smallest unit of software that can be scheduled to run
Thread
Process where CPU’s computing cycles are divided between more then one process
Time slicing
Files stored on the host computer that represent a VM hard drive
Virtual disk
Software that mimics a physical computers hardware and Bios
Virtual machine
A connection accross a public network that uses encryption
VPN virtual network
Software environ created to emulate computer hardware/Bios allowing multiple OS to run on the same physical computer simultaneously
Virtualization
