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COMPTIA A+ 1101 OBJECTIVE REVIEW
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COMPTIA A+ 1101 OBJECTIVE REVIEW
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COMPTIA A+ 1101 OBJECTIVE REVIEWInverter
- converts DC power to AC power
- provides power to a screen's backlight
Port Replicator
- similar to a docking station, but simpler and smaller
- does not commonly have an expansion card option
- typically uses a USB connection
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Preferred Roaming List (PRL)
- allows your phone to connect to the right tower
- can be updated over the air
Mobile Device Management (MDM)
- manages company-owned and user-owned devices (BYOD)
- centralized mobile device management with a specialized functionality (policies, access control, application access, corporate email configuration)
- control the entire device or a partition
- no user configuration needed
Connectionless Protocols (Examples)
- DHCP
- Trivial File Transfer Protocol (TFTP)
Connection-Oriented Protocols (Examples)
- HTTPS
- SSH
PoE Injector
adds power to an ethernet cable
PoE
- IEEE 802.3af
- original PoE standard
- now part of the 802.3 standard
- 15.4 watts DC power
- 350 mA maximum current
PoE+ - IEE 802.3at
- now also part of the 802.3 standard
- 25.5 watts DC power
- 600 mA maxiumum current
PoE++
-IEEE 802.3bt
- 51 watts and 600 mA maximum current for type 3
- 71.3 watts and 960 mA max current for type 4
- PoE with 10GBASE-T
Software-Defined Networking (SDN)
- changes physical networking infrastructure into a software based platform that can be used in the cloud
- has an infrastructure layer/data plane layer, control layer/control plane layer, and application layer/management plane layer
Supervisory Control and Data Acquisition System (SCADA)
- responsible for control and management of industrial machines
- provides real-time information and system control
Embedded Systems
purpose-built devices
Private IPv4 Address Range
10.0.0.0 - 10.255.255.255, 172.16.0.0 - 172.31.255.255, 192.168.0.0 - 192.168.255.255
Automatic Private IP Addressing (APIPA) Range
169.254.0.1 - 169.254.255.254
T568A (Image)
T568B (Image) Motherboard Information Technology eXtended (ITX) Form Factor
- low power, small form factor
- screws compatible with ATX
Server Motherboard Compatibility
- multisocket (splits the load)
- 4+ memory slots (typically)
- additional expansion slots
- designed for a rack-mounted system
Trusted Platform Module (TPM)
- a specification for cryptographic functions
- hardware to help with encryption functions
- must be supported by the motherboard
- contains a cryptographic processor, persistent memory, versatile memory, and is password protected
- make changes in the BIOS
Hardware Security Module (HSM)
- manages many cryptographic keys
- has cryptographic accelerators built in
- offload CPU overhead from other devices
- standalone device or an adapter card
Redundant Power Supply
- two or more power supplies, that can individually handle the whole load
- normally runs 50% of the load
- hot-swappable
Printer Command Language (PCL) & PostScript
- how your printer communicates with your system
PCL:
- common across the industry
PostScript:
- usually used in high end printers
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