Networks

Question 1

Connectivity

Answer 1

• Ability of systems and devices to communicate with each other, share resources and exchange data.

Question 2

Wireless Revolution

Answer 2

• Rapid adoption of wireless technologies (Wi-Fi, Bluetooth, 5G,…)

Question 3

Communication Systems

Answer 3

• Technologies infrastructure
• enables data transmission

Question 4

Physical Communication Channels (Wired data transmission)

Answer 4

• Twisted Pair Cables : used LAN Connections (traditional phone lines)
• Coaxial Cables : used for cable TV
• Fiber Optic Cables : transmies data through light at high speed.

Question 5

Wireless Communication Channels

Answer 5

• Radio Waves (Wi-Fi, Bluetooth, Cellular Network) : Wireless Comm. over short and long distances.
• Microwaves (Satellite Communication) : long distance.
• Infrared: Short range comm.

Question 6

Connection Devices and Services

Answer 6

• Digital Subscriber Line : data transmission through phone lines
• Cable : Highspeed internet via TV cables
• Satellite : Internet Connectivity through satellite orbiting the earth.
  -Cellular (3G, G, 5G): wireless internet via cellular network.

Question 7

Data Transmission Factors

Answer 7

• Bandwidth : amount of data that can be transmitted over a network in a given amount of time.
• Protocol: rules that govern data transmission
  > TCP/IP : ensures data is sent and received properly
  > HTTP/HTTPS : encryption for security for web comm.
  > FTP : Used for transferring files between systems.

Question 8

Networks

Answer 8

-Def: Group of devices that can communicate and share resources
- Network Interface Card : hardware that allows a device to connect to a network
- Network OS : manages network resources

Question 9

Types of Networks

Answer 9

-Local Area Network (LAN) : small area
-Home Area Network(HAN) : type of LAN for home
-Wireless LAN : uses wireless tech for connectivity
- Personal Area Network : uses Bluetooth, for personal use only.
- Metropolitan Area Network : connects multiple LANs in a city.
- Wide Area Network : Connects LANs over long distances.

Question 10

Network Topologies

Answer 10

• Bus : common comm. line
• Star : connected via central server or hub
• Ring : connected through circular chain
• Mesh : redundancy

Question 11

Network Strategies

Answer 11

-Client-Server : central server provides services to clients
- Peer to peer : sharing resources directly with each other (devices)

Question 12

Organizational Issues

Answer 12

• Managing Net. requires infrastructure, regular updates, and maintenance.
• Net. Security (Protecting Data, Malware, Cyberattacks,…)

Question 13

Network Security

Answer 13

-Firewalls
-Encryption
-Antivirus Software
-Multi-Factor Identification