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Computer > CompTIA A+ 3 > Flashcards

CompTIA A+ 3 Flashcards

1
Q

What is a NAS?

A

Network attached storage device.

Like a centralized hard drive for a network. Often done in a RAID array.

Common to put lots of video editing content on there or just files you need centralized.

Usually have Gigabit NICs for the fastest throughput possible.

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2
Q

What does printing collated mean?

A

Print all pages of one copy at a time rather than all page 1’s then al page 2’s, etc.

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3
Q

What is centronics?

A

A connector sometimes used for printers.

Also the DB-25.

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4
Q

What is ad hoc mode?

A

Lets a peripheral like a printer print directly connecting to a phone or other device.

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5
Q

Do you need to set permissions on/for printers?

A

Yes.

And privacy is important.

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6
Q

Is the toner the only thing you need to replace on a laser printer?

A

No, there is also an imaging drum that is sometimes a separate component than the toner.

The drum is photo-sensitive, so don’t leave exposed to light.

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7
Q

What is a hypervisor?

A

A virtual machine manager.

Manages the virtual platform and hues operating systems.

May require a cpu that supports virtualization.
Intel: VT
AMD: AMD-V

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8
Q

What is POST?

A

Power on self test.

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9
Q

What should we check if we have a low RF wireless signal?

A 
Interference
 - something else using our frequency. 
Signal strength
 - and antennas. 
Incorrect channel
 - usually auto; look for manual tuning. 
Bounce and Latency
 - multipath interference, flat surfaces. 
Incorrect access point placement
 - locate close to the users.
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10
Q

What are some things that can interfere with wireless signals?

A

Fluorescent lights
Microwave ovens
Cordless telephones
High-power sources (transformers, etc)

Can check signal strength with some devices.

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11
Q

What is c-rimm?

A

A RAM slot filler, when RIMM is used, no slots can be left empty.

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12
Q

What does an inverter do?

A

Turns dc power into ac.

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13
Q

What’s the difference between OLED and LCD?

A

OLED has better contrast, and costs more.

LCD can get brighter.

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14
Q

What does a digitizer do?

A

A glass layer that’s placed over a device’s LCD layer.

Primary purpose is to convert the analog signals from your touch commands into digital signals that the device can read.

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15
Q

Which one is newer, TLS or SSL?

A

TLS is newer.

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16
Q

Does iCloud Mail support POP3?

A

No, imap and smtp are supported.

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17
Q

What is PRI?

A

Product Release Instructions.

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18
Q

What port does LDAP use?

A

Lightweight directory access protocol.

TCP 389
- may be used to authenticate a user into a network.

Like MS active directory.

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19
Q

What is port tcp 3389 used for?

A

Screen sharing and similar functions.

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20
Q

What is port tcp 22 used for?

A

Ssh.

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21
Q

What is tcp 548 used for?

A

Apple file transfer.

22
Q

What is PCL?

A

Printer control language.

Made by HP.

23
Q

APIPA (link-local) IP addresses always start with the first 2 sections the same. What are they?

A

169.254.0.0

These addresses can only communicate over a local network, never with the internet.

24
Q

What are the RFC addresses reserved for internal or local networks?

A
  1. 0.0.0 - 10.255.255.255
  2. 16.0.0 - 172.31.255.255
  3. 168.0.0 - 192.168.255.255
25
Q

List type of protocol and port number for each:

  1. Gather statistics from a core switch?
  2. Share a folder in windows?
  3. Share a desktop from a remote location?
  4. Copy a file between MAC OS desktops?
  5. Create a secure console connection to a database server?
A 
SNMP - UDP 161
SMB (server message block) - tcp 445
RDP - tcp 3389
AFP - tcp 548
SSH - tcp 22
26
Q

SMTP port?

A

25

27
Q

DNS port?

A

53

28
Q

NetBIOS/NetBT

A

137-139

29
Q

SMB/CIFS port?

A

445

30
Q

SLP port?

A

427

31
Q

AFP port?

A

548

32
Q

DHCP ports?

A

67/68

33
Q

LDAP port?

A

389

34
Q

SNMP ports?

A

161/162

35
Q

List the port and protocol to:

Configure a firewall from a web browser?

Print to a shared windows printer?

A

HTTPS - TCP 443

SMB - TCP 445

36
Q

What is port forwarding?

A

Used to direct authorized inbound traffic to the appropriate server(s) or specifically identified application(s) on the network.

37
Q

What is a managed switch?

A

A managed network switch is a technology that allows Ethernet devices to communicate with each other and that contains features to configure, manage and monitor traffic on a Local Area Network (LAN). A managed network switch provides more control over how data travels over the network and who can access it.

38
Q

What is an unmanaged switch?

A

In contrast to the managed switch, the unmanaged switch seems a bit “brainless.” Unmanaged switches are plug-and-play devices and have no management or monitoring capabilities. … Unmanaged switches are most often used to connect edge devices or single small networks with few components.

39
Q

What speed does SATA revision 3 operate at?

A

6 Gbit/s

40
Q

What speed does USB 3.0 operate at?

A

5 Gbit/s.

41
Q

What is type 1 PoE?

A
  1. 4w of power

802. af (2003)

42
Q

What is type 2 PoE?

A

Called PoE+

30w of power.

802.at (2009)

43
Q

What is type 3 PoE?

A

Aka PoE++ or 4PPoE.

Officially 802.bt

60w of power.

There’s a type 4 as well usually called the same thing that provides 90w.

44
Q

What is the difference between active PoE and passive PoE?

A

Active negotiates with end device how much power to put out.

Power through passive is always on. Sometimes called 24v PoE. Could potentially fry devices.

45
Q

What does it mean if a virtual machine has a private address?

A

It does not communicate outside of the virtual network.

46
Q

What does it mean if a VM has a bridged network address?

A

The VM will appear as a physical device on the physical network.

47
Q

What does it mean if a VM has a shared network address?

A

The VM shares the same IP address as the physical host.

Uses a private IP address internally.

Uses NAT to convert to the physical host IP.
(Sounds like it uses PAT).

48
Q

Cooling fans and hard drives typically use what voltage?

A

12v.

49
Q

M.2 drives and motherboard logic circuits typically use what voltage?

A

3.3v.

50
Q

What are distended capacitors?

A

When a capacitor fails and the flat top bulges out.

51
Q

What is SAS?

A

Serial attached SCSI.

High-speed storage connection associated with large storage servers or data center storage facilities.

Computer (11 decks)

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