Computer Knowledge

Mobile Telecommunications Networks

2,298 Questions

Mobile telecommunications networks focus on cellular technologies including 5G architecture and GSM components. Key areas of study include network function virtualization, software defined networking, and beamforming. This topic is crucial for technical exams testing computer and networking awareness.

5G architecture componentsNetwork function virtualizationMassive MIMO technologyGSM network registersBeamforming and CSI

Mobile Telecommunications Networks Questions

Multiple choice technology databases

Which type of database replication is supported in the BlackBerry Enterprise Solution

  1. Transactional

  2. Analytical processing

  3. Merge

  4. Snapshot
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Transactional replication is the correct answer because BlackBerry Enterprise Solution uses transactional replication to ensure data consistency across the database infrastructure. This type of replication replicates data transactions in real-time, which is essential for an enterprise messaging system where data integrity and synchronization are critical. Analytical processing is not a replication type, while merge and snapshot replication are less suitable for real-time enterprise messaging systems.

Multiple choice technology databases

Which service is responsible to connect to wireless network?

  1. Blackberry Controller

  2. Blackberry messaging Agent

  3. Blackberry Dispatcher

  4. Blackberry Router
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The BlackBerry Router is responsible for connecting to the wireless network (the BlackBerry Infrastructure) via port 3101. The Dispatcher manages encryption/compression, the Messaging Agent handles mail queues, and the Controller monitors server services.

Multiple choice technology databases

BlackBerry State Database is programmatically deleted after

  1. 48 hours

  2. 2 day

  3. 24 hours

  4. 4 hours
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

24 hours is correct because the BlackBerry State Database (BBSD.nsf) is programmatically configured to be deleted after 24 hours as part of automated maintenance and cleanup routines. This prevents the accumulation of stale state data and helps maintain database performance. The 24-hour window is a standard retention period for temporary state information in the BlackBerry infrastructure.

Multiple choice technology databases

Database which consist information about the mail sent to handhled and its unique for each user?

  1. BBprofile.nsf

  2. Steadystate.nsf

  3. BBSD.nsf

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BBprofile.nsf is correct because this database file stores information about emails sent to the handheld device and is unique for each user in the BlackBerry system. The BBprofile.nsf file maintains user-specific profile data and message tracking information. Steadystate.nsf and BBSD.nsf serve different purposes (state database and other functions), making BBprofile.nsf the correct answer.

Multiple choice technology databases

Where is the configuration DB created ?

  1. MS SQL

  2. Oracle

  3. SAP

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Microsoft BlackBerry Enterprise Server (BES) configuration database is natively created on MS SQL Server (including MSDE/SQL Server Express). Oracle and SAP are not the default database platforms used for BES configuration storage.

Multiple choice technology databases

How many cluster can be setup for BES ?

  1. One

  2. Two

  3. One domino and One SQL

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The BlackBerry Enterprise Server architecture supports a single cluster setup for high availability and load balancing. While multiple servers can exist within that cluster, the fundamental design limits configuration to one cluster per BES deployment. This architectural constraint ensures stable and predictable server communication.

Multiple choice technology security

Which of the following vulnerabilities can be found in mobile applications?

  1. Cross Site Request Forgery

  2. Sql Injection

  3. None of the above

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mobile applications suffer from the same vulnerability classes as web applications. SQL Injection exploits database query weaknesses, and Cross-Site Request Forgery (CSRF) tricks users into unwanted actions; both are well-documented in mobile security research.

Multiple choice technology security

In mobile devices, the PIN acts like a password preventing other people from gaining unauthorized access to your device. If a wrong PIN is entered three times in a row the handset is locked until you enter another code, called a PUK code.What do these codes stand for?

  1. Private Identification Number and Private Unique Key

  2. Personal Identification Number and PIN Unlock Key

  3. Private Identification Number and PIN Unlock Key

  4. Personal Identifcation Number and Personal Unlock Key
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PIN stands for Personal Identification Number, and PUK stands for PIN Unlock Key (also known as Personal Unblocking Key). Distractors misidentify PIN as "Private Identification Number" or PUK as "Private Unique Key" or "Personal Unlock Key," which are incorrect terms in mobile telecommunications.

Multiple choice technology security

Which of the following is not a Bluetooth attack vector?

  1. BlueBugging, which lets an attacker make calls on another Bluetooth phone.

  2. BlueJacking, which lets an attacker add contacts to a Bluetooth device's phonebook.

  3. BlueScolding, which lets an attacker trigger program crashes on a Bluetooth device.

  4. BlueSmacking, which crashes a Bluetooth device by sending a "ping-of-death" message.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

BlueBugging, BlueJacking, and BlueSmacking are all documented Bluetooth attack vectors. BlueScolding is not a recognized Bluetooth attack. The name appears to be fabricated for this question.

Multiple choice technology security

In mobile devices, the PIN acts like a password preventing other people from gaining unauthorized access to your device. If a wrong PIN is entered three times in a row the handset is locked until you enter another code, called a PUK code.What do these codes stand for?

  1. Private Identification Number and Private Unique Key

  2. Personal Identification Number and PIN Unlock Key

  3. Private Identification Number and PIN Unlock Key

  4. Personal Identifcation Number and Personal Unlock Key
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Personal Identification Number and PIN Unlock Key is correct. PIN is the standard acronym for the code you enter to unlock devices. PUK stands for PIN Unlock Key, which is used to unlock the device when the wrong PIN is entered too many times. The distractors incorrectly use 'Private' or confuse the 'U' in PUK.

Multiple choice technology

Which cell type is used for Soft hand off?

  1. Border

  2. Beacon

  3. Standard

  4. EC
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In cellular networks, Standard cell types are used for soft handoff scenarios. Soft handoff allows a mobile device to communicate with multiple base stations simultaneously during transition, and Standard cells are designed to support this seamless handover mechanism. Border, Beacon, and EC (Emergency Center) cell types serve other purposes.

Multiple choice technology architecture

All of the below are potential to remediate oerformance problems associated with Network interface except

  1. Increase bandwidth

  2. Reduce packet size

  3. Add accelerator hardware when transporting secure data

  4. Improve performance on nodes within the network so the data is more readily available
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Increasing bandwidth, adding accelerator hardware for secure data, and improving node performance all directly address network bottlenecks. Reducing packet size actually increases overhead due to more packets requiring headers and acknowledgments, potentially worsening performance rather than improving it.

Multiple choice technology web technology

In mobile computing, PPI refer to

  1. Points per inch

  2. Pixels per inch

  3. All of Above

  4. None of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PPI in mobile computing stands for 'Pixels Per Inch', which measures screen resolution and display density. 'Points per inch' is a typesetting term. PPI affects how sharp text and images appear on mobile device screens.

Multiple choice technology web technology

Each Mobile device supports one or more inputs methods.

  1. Numeric Keypad

  2. Touch

  3. QWERTY Keypad

  4. All of above

  5. None of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mobile devices support multiple input methods including touchscreens (most common), numeric keypads (feature phones, dialers), and QWERTY keypads (physical or virtual keyboards). The 'All of above' option correctly reflects this variety.