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Showing 20 results · Page 3 for “CompTIA”. More results are available below.
Cloud+ · Resilient architecture
High availability keeps a service running through expected component failures; disaster recovery restores it after a larger disruption. Define the failure you need to withstand before adding…
Cloud+ · Virtualization operations
A hypervisor lets several virtual machines share a host while each runs its own operating system. The workloads still compete for physical CPU, memory, storage and network capacity. Investig…
Cloud-Essentials+ · Cloud fundamentals
Cloud service models differ in how much of the stack the provider operates. Virtual machines leave more operating-system work to the customer; managed platforms take over more infrastructure…
Cloud-Essentials+ · Cloud governance and cost
Cloud governance connects resource decisions to business ownership, access rules and spending controls. Consistent tags and accounts help identify who should respond to a cost increase or un…
Cloud-Essentials+ · Service management
A service helps a consumer achieve an outcome without managing every underlying component. Understand that outcome before defining support priorities and measures. Incident management restor…
CloudNetX · Advanced routing design
Large networks need explicit decisions about which routes to learn, advertise and prefer. Summarization reduces routing information but can hide detail, while redistribution joins routing do…
CloudNetX · Resilient architecture
High availability keeps a service running through expected component failures; disaster recovery restores it after a larger disruption. Define the failure you need to withstand before adding…
CloudNetX · Network protection
A network rule should express a justified communication path with the necessary source, destination, protocol and service. Segmentation limits how far a compromise can spread, but only when …
CySA+ · Security Operations
Malware that has installed on a host usually checks in with its command-and-control server on a timer, sending a tiny request every few seconds or minutes and receiving instructions. In flow…
CySA+ · Security Operations
DNS is almost always allowed out of a network, so attackers encode stolen data or commands into query names like a8f3e9c2b7.evil.example and let the resolver carry it to a server they contro…
CySA+ · Security Operations
Modern attackers avoid dropping obvious malware and instead abuse tools already on the system such as PowerShell, WMI, certutil, mshta and rundll32. Signatures cannot flag legitimate binarie…
CySA+ · Security Operations
Three DNS-based controls fight email spoofing. SPF publishes which mail servers may send for a domain; the receiver checks the connecting IP. DKIM lets the sending server sign selected heade…
CySA+ · Security Operations
Threat intelligence indicators are not all equal. Atomic indicators are values that cannot be broken down further, such as an IP address, a domain name or an email address; they are easy to …
CySA+ · Security Operations
The Cyber Kill Chain lays out seven sequential stages from reconnaissance through weaponization, delivery, exploitation, installation, command and control, and actions on objectives, which i…
CySA+ · Security Operations
A security information and event management platform collects logs from across the environment, normalizes them into common fields, correlates events across sources, and raises alerts throug…
CySA+ · Security Operations
Shannon entropy measures how unpredictable the bytes in a file are, on a scale from zero to eight bits per byte. Plain text sits around four to five, compiled code around six, and compressed…
CySA+ · Vulnerability Management
An unauthenticated scan probes a host from the network, fingerprinting services and banners the way an external attacker would. It is quick and needs no access, but it guesses at versions an…
CySA+ · Vulnerability Management
The Common Vulnerability Scoring System base score combines exploitability metrics, attack vector, attack complexity, privileges required and user interaction, with impact metrics for confid…
CySA+ · Vulnerability Management
Every scanner finding or alert falls into one of four boxes. A true positive is a real issue correctly reported. A false positive is a report of something that is not actually there, wasting…
CySA+ · Vulnerability Management
Some systems cannot be fixed on schedule, whether an unsupported medical device, an industrial controller or an application whose vendor is gone. Compensating controls reduce the exploitabil…
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