Layer 1

Question 1

Physical Layer

Answer 1

Where transmission of bits across the network occurs & includes physical & electrical network characteristics.

Question 2

Transition Modulation

Answer 2

If it changes during the clock cycle, then a 1 is represented (otherwise, a 0 is represented) no charge/light = 0, charge/light = 1

Question 3

Asynchronous

Answer 3

Uses start and stop bits to indicate when transmissions occur from the sender to the receiver (out of sync)

Question 4

Synchronous

Answer 4

Uses a reference clock to coordinate the transmissions by both sender and receiver (in sync)

Question 5

Broadband

Answer 5

Divides bandwidth into separate channels, (single cable coming into house but only pick one channel TV)

Question 6

Baseband

Answer 6

Uses all available frequencies on a medium (cable) to transmit data (can only make one call at a time, wired home ethernet network)

Question 7

Multiplexing

Answer 7

Allows multiple people to use a baseband connection at the same time

Question 8

Examples of Physical Layer

Answer 8

Wires themselves, hubs, access points, media converters