World of Computer Networking Your CCNA start - Collision

The video tutorial explains the operation of physical media in the physical layer of the CPAP model, focusing on full and half duplex modes. It discusses what happens when two devices attempt to transmit data simultaneously in half duplex mode, leading to collisions. The tutorial covers how collisions occur differently in wired and wireless media, and explains that fiber cables operate in full duplex mode, preventing collisions. It also addresses how devices detect and handle collisions according to Ethernet standards.

What is the main difference between full duplex and half duplex modes?

• Full duplex allows simultaneous send and receive, while half duplex does not.

• Half duplex allows simultaneous send and receive, while full duplex does not.

• Both modes allow simultaneous send and receive.

• Neither mode allows simultaneous send and receive.

What happens when two devices transmit data at the same time in a half duplex mode?

• The data is lost permanently.

• The devices switch to full duplex mode.

• A collision occurs.

• The data is transmitted successfully.

How do collisions manifest in wireless networks?

• Signals are amplified.

• Signals overlap and create unrecognizable waves.

• Signals are transmitted without interference.

• Signals are converted to digital form.

Why do fiber cables not experience collisions?

• They operate in half duplex mode.

• They use a different frequency.

• They always operate in full duplex mode.

• They are immune to signal interference.

Which standards describe the handling of collisions in Ethernet?

• .7 for wired and .17 for wireless communication.

• .9 for wired and .19 for wireless communication.

• .5 for wired and .15 for wireless communication.

• .3 for wired and .11 for wireless communication.