Layer 1

Question 1

Crossover cable connectors

Answer 1

T-568A and T-568B

Question 2

Straight thru cable connectors

Answer 2

T-568B on both ends

Question 3

Asynchronous communication

Answer 3

Start and stop bits to indicate when transmissions occur from send to receiver
Email or voicemail

Question 4

Synchronous communication

Answer 4

Uses reference clock to coordinate transmissions
Phone call
real time

Question 5

Broadband vs Baseband

Answer 5

Broadband: divides cables into separate channels (Cable TV)
Baseband: Use all frequencies from cable all the time (phone, ethernet)

Question 6

Multiplexing

Answer 6

Allows more people to utilize a baseband connection at the same time

Question 7

TDM

Answer 7

Time Division Multiplexing

Each session takes turns using a time slot to utilize bandwidth

Question 8

StatTDM

Answer 8

Statistical Time Division Multiplexing
More efficient version of TDM
Allocates time slots on as-needed basis

Question 9

FDM

Answer 9

Frequency Division Multiplexing

Medium is divided into various channels based on frequencies (broadband)

Question 10

Examples of Layer 1 devices

Answer 10

Cables
Radio frequencies
Hubs
WAPs
Dumb devices

Question 11

OSI Model

Answer 11

Open Systems Interconnection

Question 12

OSI 7 Layers

Answer 12

Physical
Data
Network
Transport
Session
Presentation
Application

Question 13

OSI Data Types

Answer 13

Bits
Frames
Packets
Segments
Data
Data
Data