Chapter 12 Flashcards
A friend asks you why she would ever disable cellular data networking. Which of the following is not a valid reason to disable cellular data networking?
You have a limited amount of data in your monthly plan.
You have access to a reliable Wi-Fi signal.
You are about to download an update to your phone.
Your phone calls are going out over your carrier’s cellular network.
D. Whenever you have a reliable Wi-Fi signal available, which you do not pay for “as you go,” you should feel free to disable your cellular access to data networking. The wireless network is often faster and does not cost you anything to use. If data networking works better when you leave the cellular network available as a fallback, you can choose to disable it only for certain large downloads or disable it completely until the download is complete. Phone calls will continue to be sent over the cellular network. This does not imply that your data is not using an available Wi-Fi connection. Therefore, unless you are particularly sensitive to the situation or know that data is going out over your cell access, you might not need to disable the cellular data-networking feature.
You need to pair two Bluetooth devices with each other. Which of the following is true regarding Bluetooth pairing?
Bluetooth connections support wireless device control but not file transfers.
Bluetooth is not yet a fully standardized protocol.
Bluetooth connections do not reach as far as Wi-Fi connections.
You must reboot the paired devices to complete the connection.
C. The range of Bluetooth connections is considered short compared to Wi-Fi connections. Bluetooth is a fully standardized protocol that supports file transfers using FTP. Rebooting, or even restarting, paired devices is not a requirement for Bluetooth connections.
A technician is configuring a mobile client to use email through an ISP. Which port number should he configure to use SMTP?
25
110
143
995
A. SMTP sends mail to the server on TCP port 25. POP3 uses port 110. IMAP4 uses port 143. POP3 uses port 995 securely over SSL or TLS.
You need to configure email for a mobile client. His device has a setting referring to port 587. Which mail protocol is likely using this protocol?
SMTP with SSL
SMTP with TLS
IMAP4 with SSL/TLS
POP3 with SSL/TLS
B. SMTP with TLS uses port 587 by default. With SSL, SMTP uses port 465. IMAP4 with SSL/TLS uses port 993, while POP3 with SSL/TLS uses port 995.
You are enabling email on a mobile client. Which of the following is not a standard integrated commercial provider for email?
iCloud
Hotmail
Yahoo Mail
Exchange Online
B. Four commercial email providers to be familiar with are iCloud, Google/Inbox, Exchange Online, and Yahoo Mail. Hotmail used to be a commercial email provider, but it no longer exists; it’s now part of Outlook.com.
Which two communications technologies can you use to create a VPN connection? (Choose two.)
Bluetooth
Wi-Fi
Cellular
NFC
B, C. You can create virtual private network (VPN) connections on a mobile device using Wi-Fi or cellular network connections. Bluetooth and NFC are not used to create VPNs.
A mobile device is having intermittent communications issues. Which software component of a mobile phone is most likely responsible for these issues?
Either iOS or Android OS
SIM OS
Baseband OS
Wireless OS
C. Each mobile phone has a separate processor that manages wireless communications, also known as radio communications or baseband communications. There is a baseband OS that manages this, and it works with the primary OS on the phone. A SIM OS is for managing data transfers between the phone and the SIM chip. There is no wireless OS.
In a mobile device, which of the following are examples of RTOSs? (Choose two.)
SIM OS
Baseband OS
iOS
Android
A, B. The two real-time OSs (RTOSs) that mobile phones have are the baseband OS and the SIM OS. iOS and Android are not RTOSs.
You need to configure a mobile client to send encrypted emails. Which standard is used to encrypt and decrypt email messages on mobile devices?
SSL
TLS
IMAPS
S/MIME
D. Secure/Multipurpose Internet Mail Extensions (S/MIME) is the public key encryption standard used for encrypting and decrypting email. SSL and TLS can encrypt network traffic but not an email message. IMAP is an email protocol, but there is no IMAPS.
You are pairing a Bluetooth headset to a mobile device. On the mobile device, after finding the device for pairing, what is the next step to take?
Enable Bluetooth.
Test connectivity.
Enter the appropriate PIN code.
Enable pairing.
C. The next step is to enter the PIN code. The steps, in order, are as follows: Enable Bluetooth, enable pairing, find a device for pairing, enter the appropriate PIN code, and test connectivity.
Which of the following are universally common items that are synced between a mobile device and a larger computer? (Choose all that apply.)
Office documents Contacts Operating system files Email Configuration settings Apps
B, D, F. Contacts, email, and apps are commonly synchronized, along with pictures, music, videos, calendars, bookmarks, documents, location data, social media data, e-books, and passwords.
Which of the following is not a requirement for installing iTunes on a Windows machine?
A 1GHz processor or better
1 GB of RAM or higher
400 MB of available disk space
Broadband Internet connection
B. iTunes will run on a computer with 512 MB of RAM. 1 GB is not required unless you want to play 720p high-definition videos. A 1 GHz processor, 400 MB disk space, and broadband Internet are required.
Which of the following statements about configuring email access on a mobile device is true?
Most Internet mail services offer an Exchange option.
The TCP ports used for configuring access are usually standard port numbers.
Most ports used for access are UDP ports.
You must download third-party apps for connecting to email services.
B. Mail access uses standard secure or unsecure TCP ports, not UDP ports. Exchange access to such mail services is not unheard of, but it is exceedingly rare. Mobile devices tend to have email clients built in.
Which of the following are disabled when airplane mode is switched on? (Choose all that apply.)
Cellular Wi-Fi Bluetooth Settings app Lock screen
A, B, C. Airplane mode disables all radio communications, including cellular, Wi-Fi, and Bluetooth (and NFC as well). It does not affect the opening of any other apps or the lock screen.
You need to enable clients to synchronize their mobile devices to their laptops. Which of the following are common connection types to enable laptop synchronization? (Choose all that apply.)
Cellular Bluetooth Wi-Fi USB Tethering
C, D. The two most common connection types for synchronization to a desktop (or laptop) are Wi-Fi and USB. Cellular and Bluetooth are not used for desktop synchronization. Tethering is when a laptop or other device is granted cellular network access by connecting to a mobile device, such as a smartphone.
