Network Security, Data Recovery & System Optimization

A set of flashcards covering key terms and concepts related to network security, data recovery, and system optimization.

Broadband

High-speed internet access that is always on and faster than traditional dial-up, transmitting large amounts of data simultaneously over a wide bandwidth.

DSL (Digital Subscriber Line)

A type of broadband that uses existing telephone lines to deliver internet, with ADSL being the most common variant.

Cable Broadband

Delivers internet using coaxial TV cables, generally offering higher speeds than DSL but sharing bandwidth among nearby users.

Fiber Optic Broadband

Transmits data as pulses of light through glass or plastic fibers, offering the fastest speeds and lowest latency.

Leased Line

A dedicated, fixed-bandwidth telecommunications circuit rented from a service provider, connecting two or more locations permanently.

Firewall

A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

Packet Filtering

A firewall technique that inspects packets of data traveling through the network and either allows or blocks them based on rules.

Proxy Server

Acts as an intermediary between a client and the internet, helping with anonymity, content filtering, caching, access control, and security.

Data Loss Causes

Factors leading to data loss including human error, viruses, power outages, hardware failure, natural disasters, and software corruption.

Full Backup

A complete copy of all selected data, simple and fastest to restore but takes the most time and storage space.

Incremental Backup

Backs up only the data that has changed since the last backup, being fast and storage-efficient.

Differential Backup

Backs up all data changed since the last full backup, faster restoration than incremental but requires more storage over time.

Cloud Virtualization

Spins up a system as a virtual machine in the cloud for disaster recovery, enabling remote access during recovery.

CPU Usage

Percentage of processor capacity in use; consistently high usage indicates a bottleneck in system performance.

Windows Registry

A hierarchical database storing configuration settings for the OS and applications, requiring periodic cleaning to optimize performance.

Overheating

Causes CPUs and GPUs to throttle their performance to prevent damage, leading to significant slowdowns in system operation.

System Optimization

An ongoing process of managing software and hardware to ensure efficient performance and prevent degradation.