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CompTIA+ > CompTIA A+ Core 1: Wireless Networking & Services > Flashcards

CompTIA A+ Core 1: Wireless Networking & Services Flashcards

1
Q

Describe 802.11a standard

A

Bandwidth up too 54 Mbps
operates in 5GHz frequency range
Less effective penetrating solid objects
Also referred to as Wi-Fi 2

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2
Q

Describe 802.11b standard

A

Bandwidth up to 11Mbps
2.4ghz frequency
Susceptible to interference

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3
Q

Describe 802.11g standard

A 
Emerged in 2002
Draws from 802.11a and 802.11b
Bandwidth up to 54Mbps
2.4Ghz frequency
backward compatible with 802.11b
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4
Q

Describe 802.11n standard

A

Wireless N
Multiple signals and antennas
Better range
Backward compatible with 802.11b/g

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5
Q

Describe 802.11ac standard

A 
improved bandwidth
Wider channels
Beamforming
Dual-band transmission
No backward compatibility
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6
Q

Describe 802.11ax standard

A 
Dual-band wireless
Bandwidth up to 10Gbps 
2.4/5Ghz
Lower power consumption
Better range
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7
Q

Describe 2.4Ghz frequencies

A

Better penetration of solid objects
Greater coverage area than 5Ghz
Susceptible to interference
Lower data rate

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8
Q

Describe 5Ghz frequencies

A

Higher data rate
Less susceptible to interference
Smaller coverage area
Less successful penetrating solid objects

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9
Q

Describe 2.4Ghz channels

A

Fourteen channels defined for use
depending on the country, not all channels are allowed
Each channel is 20MHz wide
Requires some of the channels overlap with each other
Channels 1,6 and 11 are good channels for typical implmentaitoosn

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10
Q

Describe 5Ghz channels

A 
Wider variety of channels for the 5GHz band
Channels begin at 36
more regulated than 2,4Ghz hand
Less susceptible to interference
fewer devices use these channels
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11
Q

Pros of Bluetooth

A

Low power consumption
Relatively secure
Versatility
Developer-friendly platform

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12
Q

Cons of Bluetooth

A

Connection issues

Devices can be inconsistent during the pairing process, possibly from interference

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13
Q

Describe Long-range fixed wireless access

A

Connects two fixed locations
Enable data communications
Alternative to installing cables between sites

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14
Q

Describe Long-range fixed wireless info

A

Point-to-point configurations
Does not require satellites
Connect users in remote areas

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15
Q

Considerations for using long-range fixed wireless

A

Geography
Licensing
Antennas
Power

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16
Q

What are factors affecting long range fixed wireless

A

Geographical interference
2.4Ghz interference
Tidal fading

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17
Q

Features of NFC (Near field communication)

A 
Contactless communication
Common in smartphones and tablets
Devices exchange data automatically
Limited range
Devices must be close
Security
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18
Q

Pros of NFC

A

Convenient
Seamless
Broad support
No pairing

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19
Q

Cons of NFC

A

Cost

Security

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20
Q

Describe features of RFID(Radio frequency identification)

A 
Embedded chip and antenna
Tracking
Automatic identification and data capture(AIDC)
Tags and readers
Active/Passive
Various applications
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21
Q

RFID Pros

A

Global standard
Multiple items
Speed
No line of sight required

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22
Q

RFID Cons

A

Scanning issues

Security

23
Q

Features of DNS

A

Convert names to IP addresses
Distributed naming system
Usually managed by the ISP or enterprise IT department

24
Q

Describe DHCP process

A

Ip address configuration
alternative to static configuration
automated IP addressing

25
Q

Describe print servers

A

Manage print requests
Provide printer queue information
large enterprise networks
small office or home networks

26
Q

Describe mail servers

A

Microsoft exchange
IBM Lotus/Domino
Open-source

27
Q

Describe web servers

A

Client/server model

Deliver content over Hypertext transfer Protocol (HTTP)

28
Q

Name common web servers

A

Apache
Internet information Services (IIS)
NGINX

29
Q

Describe file servers

A

Client/server model
Central storage and file management
Files can be accessed by computers on same network

30
Q

Describe syslog server role

A

Network devices send messages to logging server

Most network devices can send Syslog messages

31
Q

Name components of the AAA framework

A

Authentication
Authorization
Accounting(accountability)

32
Q

Describe authentication

A

Process of determining whether someone or something is true, genuine or valid
Most commonly a username and password

33
Q

Describe Authorization

A

Occurs after authentication
Access system resources and perform tasks
Policy enforcmnet
Individual permisssions
Authenticated users may be granted access to different activities

34
Q

Describe Accounting

A 
Monitor resources accessed by users
Session logging
Billing
Usage analysis
Control of authorization
Planning
35
Q

Describe Multi-Factor authentication

A

Security token
Biometric verification
Security questions

36
Q

Describe UTM(Unified Threat Management)

A

Firewall
Proxy server
Anti-virus/anti spam
Content filter

37
Q

Describe IDS(Intrusion detection system)

A 
Network based (NIDS)
Hot based (HIDS)
38
Q

Describe IPS(Intrusion prevention system)

A

Network security/threat prevention
Detect vulnerability exploits
Prevent vulnerability exploits

39
Q

Describe Load balancers

A

Traffic distribution
Increase capacity
Improve application reliability

40
Q

Describe proxy servers

A 
Access server on behalf of client
Caching, filtering, security 
Can also be caching servers
Dedicated caching servers
Can filter content
41
Q

Describe Legacy systems

A 
Old, outdated, unsupported systems
Networks can be a mix of old and new hardware/software
Expensive to maintain
Run proprietary software
May require specialised programming
42
Q

What are potential issues with Legacy Systems

A

Compatibility
Integration with modern systems
Compliance

43
Q

Migrating data from legacy systems

A

Extraction
Transformation and cleansing
Validation
Transferring to new system

44
Q

Describe Supervisory Control and Data Aquistion(SCADA)

A

Collects and analyses real-time data

Monitoring and controlling operations

45
Q

Describe SCADA Applications

A

Local or remote control
Monitor, gather and process real-time data
Device interaction
Record events

46
Q

Describe SCADA Systems

A

Master Terminal Unit(MTU)
Remote Terminal Unit(RTU)
Human Machine Interface(HMI)

47
Q

SCADA Pros

A 
Information reliability and accuracy
Real-time notifications
Trend analysis
Proactive maintance
Increased equipment lifespan
Informed decisions
48
Q

SCADA Cons

A 
Initial investment is significant
Adaption to new system
Training on new technology
Suppourt after purchase
Maintenance time costs
49
Q

Describe Internet of Things(IoT)

A

Non-traditional internet devices
From the very small to the very large
collect and transmit data

50
Q

How IoT works

A

Sensors
Communications chips
Collect and transmit data
IoT gateways

51
Q

Common IoT devices

A 
Light switches and outlets
Thermostats
Televisions
Refrigerators
Smart watches or health monitors
52
Q

Examples of Use cases for IoT

A

Manufacturing
Transportation
Agriculture
Healthcare

53
Q

Benefits of IoT

A

Lifestyle
Buisness insights
Automation

CompTIA+ (8 decks)

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