A Flashcards
(221 cards)
1
Q
IP stands for
A
Internet Protocol
2
Q
TCP stands for
A
Transmission control protocol
Connection oriented - formal process to start and end conversation
Ex. Making a phone call.
3
Q
TCP
A
Reliable delivery. Tcp send acknowledgement when sending and receiving info
4
Q
What is FTP (File Transfer Protocol)?
A
A protocol that authenticates with username and password or a generic log in, allowing full-featured functionality such as listing, adding, and deleting files.
Key ports are TCP 20 for active data transfer and TCP 21 for control/administration. FTP can also be set up with anonymous logins.
5
Q
What are the key ports used by FTP?
A
TCP 20 (active data transfer) and TCP 21 (control/administration)
Authentication is important, and FTP can be configured for anonymous logins.
6
Q
What is SSH (Secure Shell)?
A
A protocol that looks and acts like Telnet but provides encrypted remote command-line administration.
The key port used is TCP 22.
7
Q
What is the main disadvantage of Telnet?
A
It does not provide encryption, sending all data in clear text.
Uses TCP port 23 and is considered less secure.
8
Q
What is SMTP (Simple Mail Transfer Protocol)?
A
A protocol used for server to server email transfer, sending mail from a device to a mail server.
The key port is TCP 25.
9
Q
What is the primary function of DNS (Domain Name System)?
A
Translates domain names into IP addresses, which is critical for network navigation.
The key port is UDP 53.
10
Q
What does DHCP (Dynamic Host Configuration Protocol) do?
A
Automates the assignment of IP addresses and network configuration parameters.
Key ports are UDP 67 (server) and UDP 68 (client).
11
Q
What are the ports for HTTP and HTTPS?
A
HTTP uses TCP port 80 for unencrypted web traffic, and HTTPS uses TCP port 443 for secure communication.
There is a shift toward HTTPS for enhanced security.
12
Q
What are the email retrieval protocols and their ports?
A
POP3 (TCP port 110) and IMAP (TCP port 143).
IMAP offers features like folder management and synchronization across multiple devices.
13
Q
What is SMB (Server Message Block)?
A
A protocol used by Microsoft Windows for file sharing and networking.
Direct SMB communication uses TCP port 445.
14
Q
What are the legacy ports for NetBIOS?
A
UDP Port 137 (NetBIOS Name Service) and TCP Port 139 (NetBIOS Session Service).
This indicates the evolution from NetBIOS to direct SMB communications.
15
Q
What is LDAP (Lightweight Directory Access Protocol)?
A
A protocol for accessing a central database containing organizational resource data.
The key port is TCP 389, commonly used in Microsoft Active Directory.
16
Q
What is RDP (Remote Desktop Protocol)?
A
A protocol that allows sharing a desktop from a remote location, useful for troubleshooting.
The key port is TCP 3389.
17
Q
What ports are associated with FTP?
A
TCP 20 - active data transfer
TCP 21 - control/admin
18
Q
SSH port?
A
TCP 22 -encrypted remote command-line administration
Preferred over telnet
19
Q
SMTP port?
A
TCP 25 - sending email from one server to another
20
Q
DNS port?
A
UDP 53 - converts domain names www.blah.com to IP addresses 162.343.272.234
21
Q
DHCP port?
A
UDP 67 - server
UDP 68 - client
Automates assignment of IP addresses and network configuration
22
Q
HTTPS port?
A
TCP 443 - SECURE ENCEYPTED COMMUNICATION OVER THE WEB
23
Q
Bandwidth
A
Determines amount of spectrum used to transmitted data
Common bandwidth include
20 mhz, 40, 80, 160
24
Q
Bluetooth uses which frequency?
A
2.4 GHz (can be prone to interference
25
RFID
Radio frequency identification
1 way communication for identification and tracking
26
NFC
Near field communication
2 way communication for payment systems and secure Access
27
UDP stands for
User Datagram Protocol
CONNECTIONLESS
sends data without a formal connection setup
So faster but less reliable
Ideal for real Time apps like voice over IP or streaming where speed is more important than error connection
28
What does DNS stand for?
Domain Name System
## Footnote
Converts a fully qualified domain name (FQDN) into an IP address
29
What port does DNS operate on?
UDP port 53
30
What is the primary function of DHCP?
Automatically assigns IP addresses and configuration parameters to devices
31
What UDP ports are used by DHCP?
UDP 67 for server and UDP 68 for client
32
What is the role of File Sharing Services?
Allows centralized storage and access to files across the network
33
Which protocols are commonly used for file sharing?
* SMB (Server Message Block) for Windows
* AFP (Apple Filing Protocol) for macOS
34
What is the purpose of Print Services?
Manages the queuing and processing of print jobs
35
What types of systems can Email Services be hosted on?
* Locally
* In the cloud
36
What does SYSLOG do?
Centralizes log files from various devices into one repository
37
What is NTP?
Network Time Protocol
38
What is the function of NTP?
Synchronizes clocks across devices to ensure accurate timestamps
39
What are Spam Gateways used for?
Processes incoming email to filter out unsolicited messages
40
What functionalities do Security Appliances combine?
* Firewall functionality
* URL/content filtering
* Intrusion prevention
41
What is the function of Load Balancers?
Distribute network traffic across multiple servers to optimize performance
42
What is the role of Proxy Servers?
Acts as an intermediary for client requests
43
What does SCADA stand for?
Supervisory Control and Data Acquisition
44
What types of systems do SCADA/ICS control and monitor?
* Power services
* Manufacturing
45
What are Embedded Systems?
Purpose-built devices that run dedicated software with limited user interaction
46
What is meant by Legacy Systems?
Older equipment that still plays a vital role despite outdated technology
47
What does IoT stand for?
Internet of Things
48
What are examples of IoT devices?
* Smart appliances (e.g., fridge)
* Smart devices (e.g., voice-activated speakers)
* Smart thermostats
* Smart doorbells
49
Fill in the blank: DHCP is usually available on most _______.
home routers
50
True or False: Authentication Services are not required on a home network.
True
51
What is the primary database service language used for data retrieval?
Structured Query Language (SQL)
52
What is critical for log correlation in network management?
Accurate timestamps provided by NTP
53
Fill in the blank: Security Appliances may include functions such as _______ and intrusion prevention.
firewall functionality
54
What is a unique feature of Legacy Systems?
Requires specialized maintenance despite outdated technology
55
How do Load Balancers contribute to fault tolerance?
Distributes network traffic to optimize performance and ensure redundancy
56
What does DNS stand for?
Domain Name System
## Footnote
DNS maps human-friendly domain names to IP addresses.
57
What is the primary function of DNS?
Maps domain names to IP addresses
## Footnote
This allows users to access websites without remembering numeric addresses.
58
What is the top of the DNS hierarchy called?
Root Servers
## Footnote
Composed of 13 root server clusters, which include thousands of servers.
59
Name two types of Top-Level Domains (TLDs).
* Generic TLDs (e.g., .com, .org)
* Country code TLDs (e.g., .us, .ca)
## Footnote
TLDs are part of the DNS structure.
60
What is an A Record in DNS?
Maps a fully qualified domain name to an IPv4 address
## Footnote
It is one of the essential DNS Resource Records.
61
What does an AAAA Record do?
Maps a domain name to an IPv6 address
## Footnote
It is similar to an A Record but for IPv6.
62
What is the purpose of a CNAME Record?
Allows multiple names or aliases for a single server
## Footnote
It enables one physical server to support multiple services.
63
What does an MX Record do?
Directs email to the correct mail server
## Footnote
Example: IN MX mail.example.com.
64
What is stored in TXT Records?
Human-readable text and configuration info
## Footnote
Can include SPF, DKIM, and DMARC settings.
65
What does DKIM stand for?
Domain Key Identified Mail
## Footnote
It digitally signs a domain's outgoing email.
66
What is the role of SPF?
Lists authorized servers to send emails for a domain
## Footnote
Prevents mail spoofing.
67
What does DMARC stand for?
Domain-based Message Authentication, Reporting, and Conformance
## Footnote
It prevents unauthorized email use and specifies actions for emails from incorrect sources.
68
What command-line tool can be used to query DNS records?
dig
## Footnote
Common on Linux/Mac and installable on Windows.
69
What is the purpose of the TTL parameter in DNS?
Determines how long a DNS record is cached
## Footnote
Affects how often clients must re-query for updated information.
70
True or False: Changes to DNS records do not require cautious editing.
False
## Footnote
Careful editing is critical to prevent connectivity issues.
71
What is the function of the nslookup command?
Retrieves DNS record details on Windows
## Footnote
Similar to the dig command used on other systems.
72
Fill in the blank: A _______ record allows multiple aliases for a server.
CNAME
## Footnote
CNAME stands for Canonical Name.
73
What is the significance of having backups in DNS configuration?
Critical for reverting mistakes that might affect connectivity
## Footnote
Changes to DNS require cautious editing.
74
What does LCD stand for?
Liquid Crystal Display
## Footnote
LCD technology is widely used in screens for TVs, monitors, and mobile devices.
75
How do LCDs produce visible images?
Uses liquid crystals that modulate light from a backlight
## Footnote
Light passes through polarization filters and color filters.
76
What are the advantages of LCD displays?
* Lightweight
* Relatively low power
* Relatively inexpensive
## Footnote
These characteristics make LCDs popular for various applications.
77
What is a significant disadvantage of LCDs?
Backlight Requirement
## Footnote
Older LCDs often used fluorescent backlights, while modern ones typically use LED.
78
Name the three main types of LCD panels.
* TN (Twisted Nematic)
* IPS (In-Plane Switching)
* VA (Vertical Alignment)
## Footnote
Each type has distinct characteristics suitable for different applications.
79
What is a characteristic of TN (Twisted Nematic) panels?
Offers fast response times
## Footnote
Ideal for gaming, but colors may shift when viewed off-center.
80
What is a disadvantage of TN panels?
Poor viewing angles
## Footnote
Colors shift when viewed from angles other than straight on.
81
What are the advantages of IPS (In-Plane Switching) panels?
* Excellent color reproduction
* Wide viewing angles
## Footnote
They are more costly and suitable for graphics and video editing.
82
What is a characteristic of VA (Vertical Alignment) panels?
Balances good color reproduction with moderate response time
## Footnote
Their response time is slower than TN panels.
83
What is a distinct feature of OLED displays?
Each pixel generates its own light
## Footnote
No separate backlight is required, allowing for thinner designs.
84
What are the advantages of OLED displays?
* Can achieve true blacks
* Very thin designs
## Footnote
Commonly found in mobile devices such as smartphones, watches, and tablets.
85
What is the difference between standard LED and Mini LED backlighting?
* Standard LED: provides uniform brightness
* Mini LED: allows finer control for improved contrast and better black levels
## Footnote
Mini LED technology enables local dimming.
86
What does integrating a digitizer in modern displays allow?
Detect touch input via fingers or styluses
## Footnote
This offers versatile input options for laptops, tablets, and smartphones.
87
What is the purpose of an inverter in an LCD display?
Turns DC (direct current) into AC (alternating current)
## Footnote
Some laptops include inverters for this purpose.
88
How can one verify the functionality of a backlight?
* Look closely
* Use a flashlight
## Footnote
This may help determine if the LCD inverter or display needs replacement.
89
What is pixel density measured in?
Pixels per inch (PPI)
Higher pixel density results in a better visual experience.
90
How do you calculate pixel density?
Total horizontal pixel count divided by the physical width in inches
Example: For a 27 inch diagonal 4k display with 3840 horizontal pixels, PPI = 3840 / 40 = 160.
91
What is the impact of higher pixel density?
Sharper, crisper image
The same resolution on a smaller screen results in higher pixel density.
92
Define resolution in the context of displays.
The number of pixels horizontally and vertically
Examples include 1920×1080 for HD and 3840×2160 for 4K.
93
What is aspect ratio?
The ratio of the display's width to its height
## Footnote
Commonly, the aspect ratio is 16:9.
94
What does refresh rate measure?
The number of times per second the display updates its image
## Footnote
Common refresh rates include 60Hz, 120Hz, and 144Hz.
95
What is the relationship between refresh rate and frame rate (FPS)?
Refresh rate is closely linked to FPS when vertical sync (VSYNC) is enabled
## Footnote
Movies typically run at 24 fps, TV at 30 fps, and video games at 60 fps.
96
How does a higher refresh rate impact viewing experience?
Yields smoother motion
## Footnote
Particularly beneficial for gaming and video playback.
97
What is color gamut?
The range of colors available on a display or output device
## Footnote
A wider gamut means more vibrant and accurate colors.
98
What are common color standards?
* sRGB
* Adobe RGB
* DCI-P3
## Footnote
Displays are rated by the percentage they cover of these standards.
99
What is the significance of a wide color gamut in displays?
Essential for tasks requiring color accuracy
## Footnote
Important in image editing, video production, or work where color fidelity is critical.
100
What must be supported by the video card and connection type for optimal performance?
The display’s attributes (resolution, refresh rate)
## Footnote
Example connection types include HDMI 2.1 and DisplayPort 2.1.
101
What is the core of an optical fiber?
A high reflective index medium that carries the light.
## Footnote
The core is essential for light transmission in fiber optics.
102
What is the function of cladding in optical fiber?
A surrounding layer with a lower refractive index that keeps the light confined in the core through total internal reflection.
## Footnote
Cladding is crucial for maintaining the light within the core.
103
What does the buffer coating do in fiber optics?
A protective layer that surrounds the fiber, safeguarding the fragile core and cladding.
## Footnote
The buffer coating helps prevent physical damage to the fiber.
104
What is a connector assembly in fiber optics?
Connectors (often with a ceramic ferrule) are used to join fiber optic cables. These connectors protect the fiber and align it properly.
## Footnote
Proper alignment is important for minimizing signal loss.
105
What characterizes multimode fiber?
Has a comparatively larger core that allows multiple light paths (modes).
## Footnote
This type of fiber is typically used for short-distance communication.
106
What is the typical use case for multimode fiber?
Commonly used for short-distance communication (e.g., within a building) up to about 2 km.
## Footnote
It is often chosen for local area networks.
107
What light source is typically used in multimode fiber?
Typically uses a cheaper LED as the light source.
## Footnote
LEDs are sufficient for the shorter distances that multimode fiber covers.
108
What defines single mode fiber?
Features a very narrow core that permits only one mode of light, minimizing modal dispersion.
## Footnote
This design is optimal for long-distance data transmission.
109
What is the advantage of single mode fiber in terms of distance?
Designed for long-distance communications (modern Ethernet standards can use single-mode fiber over 100 kilometers).
## Footnote
Single mode fiber supports high-speed data over extensive distances.
110
What light source is used in single mode fiber?
Generally uses a laser as the light source for increased precision and range.
## Footnote
Lasers enable higher performance over long distances.
111
What are the advantages of optical fiber?
* High Bandwidth and Long Distance
* Resistance to Interference
* Security
## Footnote
These advantages make optical fiber a preferred choice for many communication applications.
112
What is a limitation of optical fiber regarding installation?
Requires specialized equipment for termination (crimping/cleaving) and testing.
## Footnote
Proper installation is critical to ensure fiber performance.
113
What is a consideration regarding the fragility of fiber optic cables?
Fiber optic cables are more fragile and need careful handling during installation.
## Footnote
Improper handling can lead to damage and signal loss.
114
What should one know about connector variability in fiber optics?
There are many types of fiber connectors; knowing the differences (e.g., LC, SC, ST) may be useful for practical troubleshooting.
## Footnote
Familiarity with connectors helps in effective installation and maintenance.
115
What are the cost factors associated with optical fiber?
Higher initial installation costs compared to copper, but lower signal degradation over long distances may offset this in the long run.
## Footnote
Long-term savings can be realized through reduced maintenance and replacement needs.
116
What is a key technical point about light sources in optical fiber?
* LED (Light Emitting Diode): Used in multimode fiber; less expensive, suitable for shorter distances.
* Laser: Employed in single-mode fiber; necessary for long-distance, high-speed data transmission.
## Footnote
The choice of light source impacts performance and cost.
117
What are the implications of core size in multimode fiber?
Multimode fiber’s larger core can result in multiple light paths (modal dispersion), which limits effective distance.
## Footnote
Modal dispersion can degrade signal quality over longer distances.
118
What does the small core of single mode fiber allow?
Allows light to travel in a single path, reducing dispersion and supporting longer distances.
## Footnote
This characteristic is essential for maintaining signal integrity over long runs.
119
32 bit processor can access how much info?
4 GB
120
64 bit processor can access how much info?
17 billion GB
121
Hardware drivers must match what?
The OS version you're using
122
Can 32 bit OS rub 64 bit apps?
No
123
Can 64 bit OS run 32 apps?
YES
124
Arm
Advanced risc machine
Could architecture designed by Arm Ltd.
Simplified instruction set used in mobile devices
125
HTT
Hyper threading technology
One CPU acts like 2
126
Virtualization can help you do what with OS?
Rub other OS within a single hardware platform
127
What do expansion cards do?
Extend the functionality of your computer
128
Many CPUs include an integrated what?
GPU
129
What is discrete graphics
The GPU is not part of the CPU
So it is an external GPU
When you need higher performance (doing gaming)
130
What is a capture card?
Puts video into your computer
Video Capture
Live streaming
For high performance
131
What is NIC
Network Interface Cards
An ethernet connection
If your motherboard does not include a nIC
If you need multiple interfaces, use this
Used with servers
132
Device driver?
Software that can help you install hardware on your computer
Check to get the latest driver
May need to use Windows Device Manager to install
133
Case fans
Pull cool air through personal computer
134
Fans may be on adapter cards. This is usefulw with what?
For high end performance, gaming
135
Passive cooling is what
Ex. Firesticks, TV set top box, media server, streaming devices
No cooling inside the system
136
Heat sink
Specially designed metal. Dissipates heat through thermal conduction
They still get hot so be careful
Heat sink receives Heat from components and then dissipates it to the cooler air
Uses thermal paste
137
Thermal paste
Moves Heat away from the component
Only need a little bit
138
Thermal pad
When thermal paste is too messy
Conduct Heat without the mess
We can cut this pad to the size we need
Not as effective as thermal paste but still good
Not reusable so you have to replace the pad
139
Liquid cooling
Coolant circulated through a computer
Used in cars and mainframe computers
Used in high end systems (graphics work, or gaming)
140
What does computer power supply do?
Convert AC power into DV power (what computers use)
141
Amperage is what
Rate of electrons passing by a point in one second
Ex. Water going through a hose, wider the hose, more water
142
Voltage
How much force pushes electrons through a point in one second
Ex. Faucet increasing the flow of water
Electrical pressure pushing electrons
143
Watt
Measurements of real power use
Volts x amps = watts
120v x .5 amps = 60watts
144
Alternating current AC
Power we receive from the wall
Direction of current is constantly alternating
Frequency of this cycle is measured in hertz Hz
145
Hertz in us
60 Hz
146
Direct current DC
Current moves from one direction only
147
Voltage carries by country. True or false
True
US - 120 Volts
Europe- 230 Volts
148
Modern motherboards use what voltage?
3.3Volts
149
VsB
Standby voltage
When computer is in hibernating mode, has power for when you're ready to turn it on
150
Hot swappable
Replacing a power supply without powering down the whole system
151
What do you size a power supply by?
Watts
152
Do printer drivers need to be specific?
Yes
153
PCL is
Printer command language
Made by Hewlett packard
154
PostScript
Created by Adobe
Popular with high end printers
155
How do you connect to a printer?
USB type b for printer
USB type a computer
156
802.11 is used for what
Wifi we use with an access point
157
Pront server
Allows people to print directly to the printer
158
What are audit logs?
Allows you to check who and what is printing on a printer
159
Imaging drum is on a what?
Laser printer
160
If printer is not working? What should you check?
The pick up roller. This grabs the paper. May need to be cleaned or replaced
161
Laser printing process
1. Process - build it in memory
2. Charging - Prepare drum for negative charge
3. Exposing - write image with laser
4. Developing - add negatively charged toner to imaging drum
5. Transferring - move toner from drum to paper
6. Fusing - Heat and pressure
7. Cleaning
162
OPC drum is sensitive to?
Light. Keep it in the bag
Keep cover in place so it doesn't hit the drum
163
What printer is typically used at home?
Inkjet
Replacing ink is expensive
Clogs easily
164
Thermal printer
White paper
Turns black when heated
No ink
Quiet
Paper is sensitive to heat and light
Used with receipts
165
3d printers use what
Additive manufacturing
Build in layers to create the object
Used with nada to create needed materials
166
Filament printing is what
Fused deposition modeling
Melt filament to print 3d objects
Most common type of 3d printing
167
Resin printing is what
For more smooth and finely detailed 3d printing
Resin is hardened using a light source
Entire printing hangs from a build platform
Take excess resin to hazardous materials depot
168
Cloud computing
Extends the management of applications and servers
Deploy infrastructure in minutes
Deploy across the globe 🌎
Cost = efficient. Use only required resources
169
Private cloud is what?
A company's own virtualized local data center
But there are public clouds too (AWS)
170
IaaS
Infrastructure as a service
Sometimes HaaS
Buying time on someone else's hardware and deploying your own software
Cloud provider provides hardware and you are responsible for everything else
Ex. A company provides server and you are responsible for building website content
171
SaaS
Software as a server
Know demand software
No local installation
End user just logs in and manages the software
Ex. Google mail, Microsoft 365
172
PaaS
Platform as a service
Someone else provides you with platform so you can build your application
You don't control data, people, or infrastructure. Trained security professionals are watching your stuff
You just handle the development
Ex. Salesforce.com
173
On premises model
Everything is managed by the client
174
IaaS provides
Virtualization, server, storage, networking
And you do everything else
175
SaaS provides
Everything. You just use it
176
Internal cloud
No resources shared
Need to build your own data centers
Initial cost but no ongoing costs since there's no 3 party billing you for usage
177
Metered cloud services
You pay for what you use
Ex. Not timelycare
178
DaaS
Your desktop is running in the cloud
Application runs on a remote server
Virtual desktop infrastructure- applications running on the service
Can have access to your desktop anywhere in the world
Can use legacy software with virtualization with new OS
179
Virtualization
One computer, with many operating systems
Ex. Having macOS, Windows 11, Linux, etc.
180
Hypervisor or virtual machines manager
Manages virtual platform and other operating systems
May require a cpu that supports virtualization
181
Intel and amd virtualization
Intel - vt or virtualization technology
Amd - amd‐v
182
Sandboxing
Isolated testing environment
No connection to real world
A technological safe space
183
Hypervisor security
Hypervisor is a sweet spot for bad guys
VM escaping - malware on the virtual machine
184
Post stands for
Power on self test
Tests main systems, video, and memory
Failures are notes with beeps and or codes. BIOS versions can differ
185
Blank screen on boot
Listen for beeps. Could be bad video, ram, or cpu, or bios configuration
186
If date or time is incorrect
Check bios through the motherboard
You may need to replace motherboard battery since this powers the BIOS
187
May be attempting to boot from an incorrect drive
Check boot order in BIOS
Check to ensure a USB isn't connected
188
Blue screen of death
Windows stop error
You don't want this
Go to windows event viewer to see this error message and see what's wrong
189
Try safe mode
If you're having an issue booting up your device to see what's wrong
May need to reseat hardware if you recently installed it
190
Spinning ball of death
MacOS X spinning wait cursor
Feedback that something is happening
Sometimes spinning may never stop - restart the system
Console logs may have some info
191
If monitor is black check what
Check all the cables
Check input button on monitor (hdmi, vga, dvi,etc)
Check brightness
Swap the monitor to check
192
If no video after windows loads do what
Use VGA mode (F8)
Generic graphics mode.
193
If no power
Check the power at the source with a multimeter at the outlet
194
Sluggish performance. Check what?
Task manager - gives Overview of performance
Check for high cpu utilization
A windows update can cause system to slow
If storage is too high it could slow
Laptops may use power saving mode - throttles cpu down and run slower
Check anti-virus as well
195
Overheating
Use hwmonitor.com
To check interal temperature
196
No warning, black screen. What do you do?
Check event viewer after restarting.
May br a heat related issue
Check fans and heat sinks
Check BIOS Dan status and temperatures
Check device manager and run diagnostics
Eliminate what works to find what is not working
197
Application crashes
Application stops working. May provide an error message
Check the Event Log
Check the Reliability Monitor
198
Rattling means
Loose components
199
Scraping means
Hard drive issues
200
Clicking means
Fan problems
201
Pop means
Blown capacitor
202
Lockups means
When everything freezes
Check for anything that may still be responding
Try Ctrl alternating delete
Check if there were any recent changes
203
F8 does what
Boot from last known working configuration
204
F8 can also do what
Safe mode - then disable automatic restart in system properties
205
Storage failures indicated by what
Loud clicking noise
Click of death
206
Grinding noises may indicate
Hard drive because it has mechanical components
Metal on metal - grinding
One small problem can cause them all to fail
207
Run hard drive diagnostics to do what?
To check the issue on the hard drive
208
Check storage river or raid in the
Storage manager
209
Raid 0 is
Striping. Requires 2 or more disks
210
Raid 1 is
Mirroring. Needs 2 or more disks. Array will work so long as one is operational
211
Raid 5 is
Parity and needs 3 or more. Need all drives but one
212
Raid 6 is
Striping but has 2 separate parity drives. Need 4 or more. We can lose all drives except for 2
213
Raid 10 is
Striping and mirroring. Need 4 or more. Can lose all but one from each set of mirrors
214
Try to set resolution close to the...
Native resolution
215
Burn in is what
Info on the screen that is from previous info
Info on screen has been there for a long time
Turn pixel shift on to prevent this
216
Lcd models have image sticking. How can you fix this
Try to display a white screen overnight to review the image sticking
217
Flashing screen. What do you do?
Check cables
Replace video cable
Try switching the monitor
Check display settings to make sure they're right
218
Small icons fix?
Change the scaling in system >display options
219
Jitter
Measurement of how much time is between frames
Excessive jitter can cause you to miss information or have choppy voice calls
220
Port flapping
Network Interface goes up and down
Swap cables to see if the flapping follows the cable
221
High latency
Delay between the request and the response
Waiting time
Some latency is normal
Packet capture provides a lot of good information for this
