CompTIA A+ 3 Flashcards
What is a NAS?
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.
What does printing collated mean?
Print all pages of one copy at a time rather than all page 1’s then al page 2’s, etc.
What is centronics?
A connector sometimes used for printers.
Also the DB-25.
What is ad hoc mode?
Lets a peripheral like a printer print directly connecting to a phone or other device.
Do you need to set permissions on/for printers?
Yes.
And privacy is important.
Is the toner the only thing you need to replace on a laser printer?
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.
What is a hypervisor?
A virtual machine manager.
Manages the virtual platform and hues operating systems.
May require a cpu that supports virtualization.
Intel: VT
AMD: AMD-V
What is POST?
Power on self test.
What should we check if we have a low RF wireless signal?
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.
What are some things that can interfere with wireless signals?
Fluorescent lights
Microwave ovens
Cordless telephones
High-power sources (transformers, etc)
Can check signal strength with some devices.
What is c-rimm?
A RAM slot filler, when RIMM is used, no slots can be left empty.
What does an inverter do?
Turns dc power into ac.
What’s the difference between OLED and LCD?
OLED has better contrast, and costs more.
LCD can get brighter.
What does a digitizer do?
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.
Which one is newer, TLS or SSL?
TLS is newer.
Does iCloud Mail support POP3?
No, imap and smtp are supported.
What is PRI?
Product Release Instructions.
What port does LDAP use?
Lightweight directory access protocol.
TCP 389
- may be used to authenticate a user into a network.
Like MS active directory.
What is port tcp 3389 used for?
Screen sharing and similar functions.
What is port tcp 22 used for?
Ssh.
What is tcp 548 used for?
Apple file transfer.
What is PCL?
Printer control language.
Made by HP.
APIPA (link-local) IP addresses always start with the first 2 sections the same. What are they?
169.254.0.0
These addresses can only communicate over a local network, never with the internet.
What are the RFC addresses reserved for internal or local networks?
- 0.0.0 - 10.255.255.255
- 16.0.0 - 172.31.255.255
- 168.0.0 - 192.168.255.255
List type of protocol and port number for each:
- Gather statistics from a core switch?
- Share a folder in windows?
- Share a desktop from a remote location?
- Copy a file between MAC OS desktops?
- Create a secure console connection to a database server?
SNMP - UDP 161 SMB (server message block) - tcp 445 RDP - tcp 3389 AFP - tcp 548 SSH - tcp 22
SMTP port?
25
DNS port?
53
NetBIOS/NetBT
137-139
SMB/CIFS port?
445
SLP port?
427
AFP port?
548
DHCP ports?
67/68
LDAP port?
389
SNMP ports?
161/162
List the port and protocol to:
Configure a firewall from a web browser?
Print to a shared windows printer?
HTTPS - TCP 443
SMB - TCP 445
What is port forwarding?
Used to direct authorized inbound traffic to the appropriate server(s) or specifically identified application(s) on the network.
What is a managed switch?
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.
What is an unmanaged switch?
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.
What speed does SATA revision 3 operate at?
6 Gbit/s
What speed does USB 3.0 operate at?
5 Gbit/s.
What is type 1 PoE?
- 4w of power
802. af (2003)
What is type 2 PoE?
Called PoE+
30w of power.
802.at (2009)
What is type 3 PoE?
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.
What is the difference between active PoE and passive PoE?
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.
What does it mean if a virtual machine has a private address?
It does not communicate outside of the virtual network.
What does it mean if a VM has a bridged network address?
The VM will appear as a physical device on the physical network.
What does it mean if a VM has a shared network address?
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).
Cooling fans and hard drives typically use what voltage?
12v.
M.2 drives and motherboard logic circuits typically use what voltage?
3.3v.
What are distended capacitors?
When a capacitor fails and the flat top bulges out.
What is SAS?
Serial attached SCSI.
High-speed storage connection associated with large storage servers or data center storage facilities.
