CS IB Topic 3 - Networking

What are the seven layers of the OSI model in the correct order?

• Physical, Data Link, Network, Transport, Session, Presentation, and Application

• Physical, Network, Data Link, Transport, Session, Presentation, and Application

• Application, Presentation, Session, Transport, Network, Data Link, and Physical

• Physical, Data Link, Network, Transport, Session, Application, Presentation

What are the four layers of the TCP/IP model?

• Network Interface Layer, Internet Layer, Transport Layer, and Application Layer

• Physical Layer, Data Link Layer, Network Layer, and Transport Layer

• Application Layer, Presentation Layer, Session Layer, and Transport Layer

• Data Link Layer, Network Layer, Transport Layer, and Session Layer

What is data compression and why is it used in computer networks?

• Data compression is used to reduce the size of data and improve network performance.

• Data compression is used to organize data and improve network efficiency.

• Data compression is used to encrypt data and improve network security.

• Data compression is used to increase the size of data and improve network performance.

What are the different types of networking cables commonly used?

• Ethernet cables, coaxial cables, and fiber optic cables

• Coaxial cables, USB cables, and power cables

• Power cables, audio cables, and HDMI cables

• HDMI cables, USB cables, and VGA cables

What is a data packet and how does it facilitate data transmission?

• A data packet is a physical device used to store data and transmit it over a network.

• A data packet is a unit of data that is transmitted over a network and facilitates efficient and reliable data transmission.

• A data packet is a type of computer virus that spreads through a network and disrupts data transmission.

• A data packet is a software program that encrypts data before transmitting it over a network.

Explain the concept of data packet congestion and how it affects network performance.

• high volume of data packets being transmitted through a network, causing a bottleneck and slowing down network performance.

• Data packet congestion only affects network performance during peak usage times.

• Data packet congestion is caused by a lack of available network bandwidth.

• Data packet congestion occurs when data packets are lost during transmission.

What is a deadlock in computer networks and how does it occur?

• a situation where two or more processes are UNABLE to proceed because each is waiting for the other to release a resource.

• a situation where two or more processes clash and create a virus on the network.

• A situation where a single process is unable to proceed because it is waiting for a resource that is already released.

• A situation where two or more processes are unable to proceed because each is waiting for the other to acquire a resource.

What is are main factors that can affect network speed in rural areas? (More than one answer)

• Poor Infrastructure

• Not enough access points / routers to provide wireless signals

• Network Interference from Lightning and Thunder

• Animals who interfere with network signals

• Too many people accessing networks all at once.

Which is not an advantage of Fiber optic cables when compared to Coaxial and Twisted Pair?

• Easy and fast to install

• • Performs very well over long distances

• Can handle very fast bandwidth speeds

• Very Durable

• Resistant to Electromagnetic interference (EMI)

Identify three factors when selecting/buying transmission media (networking cables).

• Distances to be covered

• Speed

• Reliability

• Color

• Thickness