Understanding Data Communication Concepts

What are the seven layers of the OSI model?

• 1) Physical, 2) Data Link, 3) Network, 4) Transport, 5) Session, 6) Application, 7) Firewall

• 1) Physical, 2) Data Link, 3) Network, 4) Transport, 5) Application, 6) Session, 7) Internet

• 1) Physical, 2) Data Link, 3) Network, 4) Transport, 5) Session, 6) Presentation, 7) Application

• 1) Network, 2) Transport, 3) Internet, 4) Application, 5) Session, 6) Presentation, 7) Link

Which layer of the OSI model is responsible for data encryption?

• Transport layer (Layer 4)

• Application layer (Layer 7)

• Network layer (Layer 3)

• Presentation layer (Layer 6)

What is the difference between TCP and UDP in data transmission?

• TCP is reliable and connection-oriented, while UDP is faster and connectionless.

• TCP and UDP both guarantee data delivery and order.

• UDP is slower and requires a connection, while TCP is faster and connectionless.

• TCP is faster and connectionless, while UDP is reliable and connection-oriented.

How do you convert the binary number 1010 to decimal?

• 10

• 2

• 8

• 12

What is the hexadecimal equivalent of the decimal number 255?

• FF0

• F0

• FE

• FF

What type of network is characterized by a small geographical area, such as a home or office?

• Personal Area Network (PAN)

• Metropolitan Area Network (MAN)

• Wide Area Network (WAN)

• Local Area Network (LAN)

What does WAN stand for, and how does it differ from LAN?

• WAN stands for Wide Area Network.

• WAN is a network that connects devices in a single building.

• WAN is a type of wireless network.

• WAN stands for Local Area Network.

What is the primary purpose of the Network Layer in the OSI model?

• To route data packets between devices across different networks.

• To provide physical connectivity between devices.

• To manage user authentication and access control.

• To encrypt data for secure transmission.

Define subnetting and its importance in networking.

• Subnetting is the process of merging multiple networks into one large network.

• Subnetting is only used for wireless networks.

• Subnetting has no impact on network security or performance.

• Subnetting is the division of a network into smaller sub-networks, important for efficient IP management, security, and performance.

What are the advantages of a star topology over a bus topology?

• Bus topology allows for easier device isolation than star topology.

• Star topology is more reliable, easier to troubleshoot, supports scalability, and isolates devices better than bus topology.

• Star topology is less expensive than bus topology.

• Star topology requires more cabling than bus topology.