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Showing 20 results for “os”. More results are available below.
A+ · Hardware
RAID 0 stripes data across drives for speed with zero redundancy; one failure loses everything. RAID 1 mirrors two drives, tolerating one failure at the cost of half the capacity. RAID 5 str…
A+ · Hardware
…CIe lanes. B+M keyed drives fit either slot and are almost always SATA. A and E keys are for Wi-Fi and Bluetooth cards. The slot on the motherboard must support the protocol as well as the k…
A+ · Hardware
…harging puts a uniform negative charge on the drum. Exposing uses the laser to draw the image by discharging spots. Developing attracts toner to those exposed spots. Transferring moves toner…
A+ · Networking
…TP 25, DNS 53, DHCP 67 and 68, HTTP 80, POP3 110, NetBIOS 137 to 139, IMAP 143, SNMP 161 and 162, LDAP 389, HTTPS 443, SMB 445, and RDP 3389. Secure variants sit on different ports: SMTPS 58…
A+ · Networking
…annot reach a DHCP server; it can talk to other APIPA hosts on the same segment but not the internet, so the fix is to check the DHCP server, the cable or the VLAN. Private ranges from RFC 1…
A+ · Mobile Devices
Most laptop screens are LCD panels that need a backlight, now LED, behind the liquid crystal layer. IPS panels give wide viewing angles and accurate colour, TN panels are cheaper and faster …
A+ · Mobile Devices
… wipe removes company email and apps while leaving photos alone; a full remote wipe resets the whole device and is reserved for company-owned or lost hardware. Mobile application management …
A+ · Mobile Devices
…on points here or to the rotation lock setting. The gyroscope measures orientation and angular movement for games and stabilisation. The magnetometer is the compass. GPS provides location, a…
A+ · Virtualization and Cloud Computing
… operating system underneath, as with VMware ESXi, Microsoft Hyper-V and KVM, and is used in data centres for performance and isolation. A Type 2 hypervisor runs as an application on a host …
A+ · Virtualization and Cloud Computing
…ual machines, storage and networks you manage from the OS up. Platform as a Service provides a managed runtime or database so you deploy code without patching servers. Software as a Service …
A+ · Virtualization and Cloud Computing
Virtual desktop infrastructure hosts user desktops as VMs on central servers, delivered to thin clients or any device over a remote display protocol; it centralises patching and data but dep…
A+ · Operating Systems
…s, so a large ISO will not copy to it. exFAT removes those limits while staying compatible with Windows, macOS and many devices, making it the choice for large flash drives shared between sy…
A+ · Security
…ices. When configuring a new business access point, choose WPA3 or WPA2-Enterprise and turn off WPS.
A+ · Troubleshooting
…tions and outcomes. Stems that ask what to do first almost always want step one, and the classic trap is jumping to a fix before confirming the cause. Mnemonic: I Eat Tacos Every Very Day.
A+ · Troubleshooting
…ory and graphics card, since poorly seated RAM is the most common cause. Check that the 24-pin and CPU power connectors are fully inserted and that the monitor is on the correct input. Liste…
A+ · Troubleshooting
Laser printer faults are diagnosed by the pattern. Toner that smudges off the page means the fuser is not reaching temperature. A defect that repeats at a regular interval down the page come…
A+ · Operational Procedures
A change request documents the purpose, scope, affected systems and date of a proposed change, along with a risk analysis, a test plan and a rollback plan in case it fails. It goes to a chan…
A+ · Operational Procedures
Electrostatic discharge can destroy components without a visible spark, so wear an anti-static wrist strap connected to ground, use anti-static mats and bags, and avoid carpets. Unplug equip…
A-CSD · Team facilitation
…helps a group think and decide together. State the purpose, establish how a decision will be made and create room for perspectives that might otherwise be missed. Separate collecting ideas f…
A-CSD · Scrum coaching and adaptation
…duct increment needs a common quality understanding across the contributing teams.
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