Data Center Redundancy
This term refers to the practice of duplicating critical components in a data center, like power supplies and network connections, to ensure availability in case of failure.
What is redundancy?
These redundant systems are implemented to ensure continuous availability, including multiple power supplies and backup generators in case of failure.
What is power redundancy or dual power feeds?
This type of network topology is commonly used in data centers to provide high availability, by connecting each switch to every other switch in a mesh pattern.
What is a spine-leaf topology?
This network mode in KVM allows each virtual machine to have its own IP address and be fully accessible on the local network, like a physical machine.
What is bridged networking?
This command opens the System Configuration Utility, often used to troubleshoot startup issues.
What is msconfig?
This command is used to display or configure the network interfaces in Linux.
What is ifconfig?
In a data center, this is the term for the system designed to automatically switch to a backup resource in the event of a failure, ensuring minimal disruption.
What is failover?
This backup solution is commonly used in data centers to ensure data is protected and can be quickly restored in case of system failure, often stored both on-site and off-site.
What is a data backup system?
This protocol allows devices in a data center to dynamically learn the best route to send data across a network, based on changing network conditions.
What is the Border Gateway Protocol (BGP)?
KVM supports this feature, which allows network traffic to be isolated between virtual machines and the host, preventing unwanted access between them.
What is network isolation?
This command is used to check and repair file system errors on a disk or drive.
What is chkdsk?
This command shows the disk space usage for files and directories in Linux.
What is du?
This component in a data center often has multiple backup power feeds, typically from different sources, to ensure uptime during power disruptions.
What is a power distribution unit (PDU)?
This network device is responsible for directing traffic between servers, ensuring efficient communication both within the data center and with external networks.
What is a network switch?
This is the standard used for high-speed interconnection in data center networks, offering a 100Gbps or higher transmission rate.
What is Ethernet?
This command-line tool is used to configure and manage network interfaces in a KVM environment, including defining bridges and setting up NAT.
What is virsh?
This command is used to display the current network configuration, including IP addresses, DNS servers, and more.
What is ipconfig?
This command is used to display a list of currently running processes in Linux.
What is ps?
This technique ensures that data is copied across multiple servers or locations, providing redundancy and protection in case of a system failure.
What is data replication?
This type of cooling system is used to prevent overheating by circulating cold air through racks while hot air is directed into exhaust systems.
What is a CRAC (Computer Room Air Conditioner) unit?
This protocol in data center networking helps to keep data consistent across multiple locations by syncing data in real-time.
What is Network File System (NFS)?
KVM uses this to create a virtual network bridge, allowing virtual machines to be connected to the same physical network as the host.
What is a Linux bridge?
(Daily Double)
This command provides detailed information about the system, including the OS version, processor, memory, and more.
What is systeminfo?
This command is used to shut down or restart a Linux system from the command line.
What is shutdown?
This configuration in a data center uses two or more data centers in different locations to replicate services and ensure high availability, even during a disaster.
What is disaster recovery or data center failover?
(Daily Double)
This technology provides a virtualized environment, allowing multiple virtual servers to run on a single physical server, maximizing resource utilization.
What is server virtualization?
This layer 3 protocol is used in data centers to route data between different subnets or VLANs.
What is the Internet Protocol (IP)?
This KVM command-line utility is used to troubleshoot network configurations and monitor network traffic in virtual environments.
What is tcpdump?
This command is used to change file or directory permissions in Windows.
What is icacls?
This command shows the routing table in Linux, indicating the paths data takes to reach different network destinations.
What is route?