Physical Hardware
The official name for an "RJ45" connector. "RJ45" is generally used incorrectly to refer to this.
What is 8 position, 8 contact (8P8C)?
This networking device is responsible for forwarding packets between computer and networks.
What is a "router"? What is a "switch"?
The name of the common disk storage type used by KVM?
What is QCOW2? What is RAW?
This is a type of program that takes commands from the keyboard and gives them to the operating system to perform
What is a "Shell"?
This tool is used to browse the internet without a Graphical User Interface (GUI).
What is `links`, `lynx`, `CURL`, `netcat`, or `telnet`?
This type of memory can detect and correct the most common kinds of internal data corruption. It is used in most computers where data corruption cannot be tolerated under any circumstances, such as for scientific or financial computing.
What is Error-correcting code memory (ECC memory)?
This type of network is often paired with network clients that allows clients to connect to other networks in different geographical locations remotely over a secure tunnel.
What is a "VPN"? (Virtual Private Network)
In a Dockerfile, this is the directive that defines which image your new docker container will be based-off of.
What is `FROM`?
This program is a window that lets you interact with the shell application.
What is a "terminal"?
The utility used to view current running processes.
What is "top"/"htop"/"ps",etc.?
Server hardware uses special hardware for out-of-band communication and management of a physical server. Often times, it DOES NOT require the server to be powered on, just plugged in.
What is an out-of-band management console?
What is Integrated Lights-Out(iLO) (HP)?
What is Dell Remote Access Controller(DRAC) (Dell)?
This service is responsible for assigning MAC Addresses with IPv4 addresses.
What is a DHCP (Dynamic Host Configuration Protocol) server?
This is an open-source container-orchestration system for automating application deployments, scaling, and management. Originally developed by Google.
What is "Kubernetes"?
This environment variable will store the return code of the previously entered command.
What is `$?`?
Run `echo $?`.
The communication protocol is used for controlling, monitoring, and diagnosing coffee pots.
What is "Hyper Text Coffee Pot Control Protocol"? RFC 2324. (HTCPCP)
https://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_Protocol
The main physical difference between CAT5E and CAT6.
What are troughs / cable spline / pair separators / ripcord?
This CLI utility interacts with the kernel network stack to administrate IPv4/6 packet filtering and Network Address Translation (NAT).
What is "IPTables"/"firewall-cmd"/"ufw"?
A Linux kernel feature that limits, accounts for, and isolates the resource usage (CPU, memory, disk I/O, network, etc.) of a collection of processes.
What are `cgroups`?
This symbol, when passed into `cd` will change your working directory to the previously visited directory.
What is `-`?
Try `cd -`... after visiting two different directory paths.
This is different than using `cd ..`, because `..` just represents the parent directory.
This technique provides a VM that completely simulates the underlying hardware.
What is "Full Virtualization"?
SATA is a protocol used to move data to and from computer-storage devices such as hard drives. This protocol can be used to move data faster by parallelizing read-write operations.
What is "SAS"? (Serial Attached SCSI)
This is used to send packets/messages to all local clients on the same subnet as your client. Generally, the data is transmitted over UDP.
What is the "broadcast address"/"multicast address"?
This classification of hypervisors are native or bare-metal hypervisors. This requires the hypervisor to be the base layer interacting with the physical hardware.
What is a "Type-1" hypervisor?
This keyboard shortcut allows you to recall previously typed in commands based on the commands stored in your history file. (In Bash, its `.bash_history`.)
What is "Ctrl + R"?
Server heights are measured in "U" (Rack Unit). Each "U" is defined as 1.75 inches. A typical full size rack contains how many rack units?
What is "42U"?