Podcast
Questions and Answers
What is the main difference between 3G and 4G?
What is the main difference between 3G and 4G?
Which technology standards have made 4G possible?
Which technology standards have made 4G possible?
What does WiMAX stand for?
What does WiMAX stand for?
World Interoperability for Microwave Access
Wi-Fi stands for “wireless ____”.
Wi-Fi stands for “wireless ____”.
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What is one of the most important features of 5G?
What is one of the most important features of 5G?
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What technology does 5G use for radio bands?
What technology does 5G use for radio bands?
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Facebook has over 2.8 billion monthly active users as of December 31, 2020.
Facebook has over 2.8 billion monthly active users as of December 31, 2020.
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An ___________ backup archives all data, while a ___________ backup archives all changes since the last full backup.
An ___________ backup archives all data, while a ___________ backup archives all changes since the last full backup.
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Match the backup strategy with its description:
Match the backup strategy with its description:
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What does a proxy server provide in terms of network security?
What does a proxy server provide in terms of network security?
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File servers allow users to share information over a network without physically transferring files.
File servers allow users to share information over a network without physically transferring files.
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Which of the following are benefits of a proxy server? (Select all that apply)
Which of the following are benefits of a proxy server? (Select all that apply)
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State three primary backup types of retrieving data: 1. ___________ 2. ___________ 3. ___________
State three primary backup types of retrieving data: 1. ___________ 2. ___________ 3. ___________
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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Study Notes
Types of Internet Connection
- Dial-up connection uses a modem to connect a PC to the internet via a telephone line.
- Leased lines are high-speed connections rented by businesses to connect branch offices.
- Broadband options available to consumers include:
- Digital Subscriber Lines (DSL)
- Cable modems
- Wireless broadband
- Wireless cell phone internet
- Satellite broadband
Wi-Fi
- Wi-Fi stands for "wireless fidelity" and allows devices to exchange data wirelessly over a network.
- Wi-Fi is popular technology for high-speed internet connections.
- Wi-Fi access points have a coverage area of about 20 meters indoors and even greater outdoors.
- Wi-Fi is known to be less secure than wired connections and has adopted various encryption technologies to address this.
WiMAX
- WiMAX stands for "World Interoperability for Microwave Access".
- WiMAX is a technology that delivers carrier-class, high-speed wireless broadband at a low cost.
- WiMAX operates at 10-66 GHz Line of Sight (LOS) and 2-11 GHz non-LOS.
- WiMAX has applications in fixed and mobile wireless broadband access.
Generations of Mobile Networks
- 2G (Second Generation) refers to the second generation of mobile networks based on GSM.
- 2G capabilities include:
- Data speeds of up to 64 kbps
- Use of digital signals instead of analog
- Enabled services like SMS and MMS
- Provided better quality voice calls
- 3G (Third Generation) combines aspects of 2G with new technologies and protocols to deliver faster data rates.
- 3G features include:
- Speed of up to 2 Mbps
- Increased bandwidth and data transfer rates
- Send/receive large email messages
- Large capacities and broadband capabilities
- 4G (Fourth Generation) has key technologies like MIMO and OFDM.
- 4G features include:
- Support interactive multimedia, voice, video
- High speed, high capacity, and low cost per bit
- Global and scalable mobile networks
- 5G (Fifth Generation) uses millimeter wave bands in the 30 GHz to 300 GHz range.
- 5G features include:
- Extremely fast coverage with low latency
- Scalable orthogonal frequency-division multiplexing (OFDM) framework
- 60 to 120 times faster than 4G latency
Search Engines
- Search engines are websites or software that enable users to find documents or media on the internet.
- Famous search engines include Google and Bing.
- Google holds the majority share of search engine usage.
Social Networking
- Social networking is the use of internet-based social media sites to stay connected with friends, family, colleagues, customers, or clients.
- Social networking can have social and business purposes.
- Popular social networks include Facebook, Twitter, LinkedIn, and Instagram.
- Facebook remains the largest and most popular social network.
Backups, Recovery & Server Security
- Backups are periodic archiving of data to provide redundancy and serve as backups in case of server failure.
- Three primary backup types are:
- Full: All data is archived.
- Differential: All changes since the last full backup are archived.
- Incremental: All changes since the last backup of any type are archived.### Backup Strategies
- There are three primary backup types: full backup, differential backup, and incremental backup.
- Full backup: a complete backup of all data, which is time-consuming and resource-intensive.
- Differential backup: backs up all changes made since the last full backup, which is smaller and faster than a full backup.
- Incremental backup: backs up only the changes made since the last backup, which is the smallest and fastest of the three.
File Server
- A file server is a computer responsible for the central storage and management of data files.
- It allows users to share information over a network without having to physically transfer files.
- Any computer can be configured to be a file server, but it can also be a dedicated network-attached storage (NAS) device.
Email Server
- Email servers provide the communications backbone for many businesses.
- They can be run as an additional service on a server or as dedicated systems.
- Putting an active virus scanner on email servers can reduce the number of viruses introduced into the network.
Proxy Server
- A proxy server is a server that provides a gateway between users and the internet.
- It acts as an intermediary between end-users and the web pages they visit online.
- Proxy servers can provide a valuable layer of security for computers, filtering traffic according to its level of safety.
- Benefits of a proxy server include:
- Enhanced security
- Private browsing
- Access to location-specific content
- Preventing employees from browsing inappropriate or distracting sites
Network Security
- Backups should be performed incrementally across multiple disks and servers, and on different time schedules.
- Backups should be stored in geographically different places to prevent disasters from destroying the business's IT core.
- Email servers can be protected by putting an active virus scanner on them to reduce the number of viruses introduced into the network.
- Proxy servers can be used to improve security, balance internet traffic, and control the websites employees access.
Social Networking
- Social networking is the use of internet-based platforms to connect with others, share information, and engage in conversations.
- Examples of social networking platforms include Facebook, Twitter, LinkedIn, and Instagram.
- Social networking has become a significant base for marketers seeking to engage customers.
Networking
- A leased line is an alternative technology for using a dedicated line, providing a secure and reliable connection between locations.
- The range in radio millimeter band where fifth generation rarely uses is 24 GHz.
- The service that often accompanies satellite television service and uses the same receiver for downloading is broadband.
Internet Connectivity
- The generation of mobile network where the data speed is up to 64 kbps is 2G.
- The standard typically based on global interoperability including ETSI HIPERMAN, IEEE 802.16d-2004 for fixed, and 802.16e for mobile high-speed data is WiMAX.
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Description
Test your knowledge of mobile network technologies, including 3G, 4G, WiMAX, Wi-Fi, and 5G. Learn about the standards and features that make them possible.
