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Showing 17 results · Page 9 for “CompTIA”.
Security+ · Security Operations
Three DNS-based mechanisms defend a domain against spoofed email. SPF publishes which mail servers are permitted to send for the domain, so receivers can check the connecting server. DKIM ad…
Security+ · Security Operations
Discretionary access control lets the owner of a resource decide who may use it, as with file permissions on a workstation. Mandatory access control uses labels such as Secret and Top Secret…
Security+ · Security Operations
Remote Desktop Protocol on TCP 3389 is one of the most attacked services because exposed hosts are easily found and brute forced, and RDP has had critical remote-code-execution flaws. Best p…
Security+ · Security Program Management and Oversight
Quantitative risk analysis produces a yearly number to compare against the cost of controls. Single loss expectancy is asset value multiplied by exposure factor, the fraction of value lost i…
Security+ · Security Program Management and Oversight
Once a risk is identified, an organisation chooses how to treat it. Avoidance removes the activity entirely, such as not launching a feature. Transference shifts the impact to another party …
Security+ · Security Program Management and Oversight
A business impact analysis produces two key numbers for every critical system. Recovery point objective is the maximum acceptable data loss expressed in time, so an RPO of 15 minutes means b…
Security+ · Security Program Management and Oversight
Vendor and partner relationships run on a few standard documents. A non-disclosure agreement binds a party to keep shared information confidential. A service level agreement defines measurab…
Security+ · Security Program Management and Oversight
Privacy regulations like GDPR assign roles. The data controller determines the purposes and means of processing personal data; it is the organisation that decided to collect the data in the …
SecurityX · Cloud security
Moving a workload to a provider does not remove the need to manage permissions, secrets and sensitive information. Map where data enters, is stored and leaves, then identify the identities a…
SecurityX · Risk assessment and treatment
Risk combines the possibility of an unwanted event with its consequences for an objective. Identify the asset, threat and conditions before choosing a response. Controls may reduce likelihoo…
SecurityX · Security architecture
A trust boundary is where data or actions cross between components with different security assumptions. Map those crossings and require appropriate validation, identity checks and authorizat…
Server+ · Backup and recovery
Recovery point objective describes tolerable data loss measured in time; recovery time objective describes tolerable restoration time. Backup frequency influences the first, while restore sp…
Server+ · Server infrastructure
Redundant components improve availability only when a single failure cannot disable all of them. Two power supplies connected to the same failed power source still lose power together. Trace…
Server+ · Storage concepts
Block storage presents volumes to an operating system, file storage organizes shared files and directories, and object storage addresses objects with metadata. The workload determines which …
Tech+ · Computing fundamentals
RAM holds the instructions and data a computer is actively using. It is volatile, so losing power loses its contents. Persistent storage keeps saved files between sessions. Saving moves work…
Tech+ · Network fundamentals
DNS translates names into addresses, while IP addressing identifies network interfaces and routing moves packets between networks. A device can have working network connectivity even when na…
Tech+ · Security foundations
Confidentiality limits who can see information, integrity protects against unauthorized changes, and availability keeps services usable. A control may support several objectives, but the imm…
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