What is the primary focus of the OSI model's physical layer?

• Data encryption

• Electrical signal transmission

• User authentication

• Network routing

Which of the following is NOT a type of telecommunications media discussed in the video?

• Coaxial cable

• Satellite dish

• Twisted pair cabling

• Fiber optics

What is the main purpose of the support structures in a coaxial cable?

• To prevent signal loss

• To reduce cable weight

• To enhance data speed

• To provide wireless connectivity

What is the primary difference between shielded and unshielded twisted pair cables?

• The number of wires

• The presence of a metal wrapping

• The color of the cables

• The type of connectors used

Which category of twisted pair cabling is known for handling high-speed connections?

• Cat 3

• Cat 5

• Cat 2

• Cat 4

What type of signal does fiber optics use to transmit data?

• Light

• Magnetic

• Sound

• Electrical

Why is fiber optics considered more secure than copper cables?

• It is easier to install

• It is cheaper to produce

• It is harder to tap

• It is more flexible

What is a significant advantage of fiber optics over traditional cabling?

• Easier installation

• More color options

• Higher bandwidth

• Lower cost

In what type of environment is fiber optics particularly beneficial?

• Outdoor camping

• High-security government

• Underwater exploration

• Low-security residential

What is the role of the backbone in a network?

• To connect different networks

• To encrypt data

• To provide wireless access

• To handle large quantities of data