A plus 220-1001 – Exam Objective 1.5
A+ Exam Objective 1.5
1.5 Given a scenario, connect and configure
accessories and ports of mobile devices.
Welcome to ExamNotes by CertBlaster! This installment looks at the ports and accessories available on mobile devices. We’ll look at the connection types, the physical connection, and any communication protocols that may be used. Enjoy!
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Let’s start with the connection types available for mobile
devices and their accessories. We have already discussed Wi-Fi and Bluetooth in
detail (in prior ExamNotes) but there is a third type that you need to be
knowledgeable about. This third type is called Near Field Communication (NFC).
NFC is not a new technology and due to its main security feature of its 10 cm
transmission range, has experienced resurgence through the proliferation of
mobile devices. Attackers have to be practically touching the target device in
order to be able to exchange data. NFC can be used for tap and pay, which exchanges
payment information with a NFC capable reader at the cash register, as well as
exchanging contact information with friends or clients simply by tapping
compatible phones together. The ultimate business card!
vendor specific ports (communication /power)
Each vendor introducing new technology will design proprietary
connector types for power and data. As the technology becomes popular with
users, the manufacturers or the IEEE will agree upon and standardize a specific
connection type that will be used in the 2nd generation
MicroUSB and miniUSB are two connection types that became
standard then eventually were phased out in favor of another. The miniUSB
connector was introduced as a digital camera and media player charger and data
connector. MiniUSB was only marginally smaller than the standard USB B
connection and it wasn’t long before a replacement, the microUSB, was designed
and adopted. The microUSB connection is more durable and mobile device friendly
than the miniUSB. The microUSB is also considerably smaller and is suitable to not
only fit media based devices but also the sleek, thin smartphones and Tablet
PCs that were flooding the market. The mass adoption of microUSB spelled doom
for the miniUSB connector. You may see the miniUSB in the field but all new
devices are considerably more likely to be microUSB as devices developed a
slimmer profile. Most recently, the USB-C connector was developed with a higher
speed, a small profile, and a reversible orientation. With USB-C, you can plug
it in either way and there’s no more guessing when you connected a device.
Apple was one of the initial
developers of USB-C along with other major industry leaders. Seeing how slowly
the standard was being developed, Apple left the group and developed their own
similar but proprietary connector called Lightning. This connector was in
production before USB-C (USB 3.1) was approved. The connector is compatible
with many other standards, but you’ll need to obtain adapters to use it.
Earlier Bluetooth wireless connections were not as fast as it is
currently (initially 2MBs). The maximum range and speed have increased fairly
steadily as shown in the table. Special protocol features allow users to create
Personal Area Networks (PAN).
Characteristics of different
Infrared transmissions use the invisible light spectrum to
transmit low power signals to compatible devices. There are many applications
that utilize the technology, most notably remote control signaling for home
theatre devices, garage door openers, and any dedicated device that has an
unobstructed line-of-sight. Some smartphones incorporate this technology allowing
users control of their multimedia components.
During tethering, a smartphone is connected to a laptop or
tablet using a compatible USB cable, allowing the cellular device’s connection
to be shared wirelessly to other devices. During this process, the Internet
connection is used to create a mobile hotspot, through which the other devices
can access resources on the internet.
Practically speaking, any network-capable and many device-specific
accessories can be connected, used, or shared. Here is the short list.
The diminutive size of most smartphones and even laptops makes
sound reproduction a challenge. A good headset can be connected using the 1/8”
headphone jack, USB, or Bluetooth. Any of these connection types will provide
high quality audio.
The device size and speaker quality will have the greatest
impact on the sound quality again. If you plan on using your mobile device to listen
to music or watch movies, the built-in speakers in most mobile devices will not
provide the most enjoyable experience.
For the most enjoyable experience, connect your device to a
docking station containing stereo speakers and possibly a sub-woofer. There are
many brand specific docks built exactly for your device.
In a gaming machine, once you have a high speed processor, a
high resolution display, and superior sound, the last thing you will need is a
superior game controller. The controller should have good response numbers as
you do not want any missed actions and poor response time. Avoid poor or bad
connections by not using Bluetooth or IR controllers since those devices need a
direct line of sight. Something as simple as your pet or a friend passing
between your controller and the gaming machine could get you killed in the game
pack/ battery charger
When you travel, many airports, train stations, and hotel
lobbies have charging stations for your devices. If you have the ability, carry
an extra battery and keep it charged. It sounds simple but there are few
things worse than having the foresight to have an extra battery and later find
that it’s dead! Lastly, bring a power inverter that you can plug into a rental
car’s cigarette lighter and so that you can charge your devices.
If your business requires taking payments, there are very handy
credit card readers that attach to your cell phone and validate credit cards
over the internet.
For Memory/MicroSD, carry a read/write USB adapter that will let
your presentations or sales data live on if your primary device fails. Keep the backed up information up to date.
covers / waterproofing
Protect your devices from the elements by placing your devices
in protective cases that will protect them if dropped and keep them dry. Be
smart and don’t blindly trust these protections past what common sense would
That is all for Sub domain 1.5! Be safe, study hard, and good luck on the test.
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