Cisco Device Functions

Question 1

Hubs

Answer 1

Operate in half-duplex
All hosts share the same collision domain
If two hosts send at once = collision

Question 2

CSMA/CD

Answer 2

Carrier-Sense Multiple Access/Collision Detection:

Hosts use this to detect collisions & resend

Question 3

Switches

Answer 3

Operate in either half or full duplex (almost always full)

All hosts have their own collision domain
Collision detection not required

Operates at layer 2 (MAC aware)

Forward broadcast traffic by default

Question 4

Routers

Answer 4

Know the paths to get to different subnets

Required to sent traffic from one subnet to another

Layer 3
Also operate at layers 2/1 & typically have awareness up to layer 7

Do not forward broadcast traffic by default