1.3 - Explain the concepts and characteristics of routing and switching. Flashcards
1
Q
What is an Ethernet Frame made of?
A
Preamble - 56 alterna.ng ones and zeros used for synchroniza.on (101010…)
SFD - Start Frame Delimiter - designates the end of the preamble (10101011)
Destination MAC Address - Ethernet MAC address of the des.na.on device.
Source MAC Address - Ethernet MAC address of the source device.
EtherType - Describes the data contained the payload.
Payload - Layer 3 and higher data.
FCS - Frame Check Sequence - CRC checksum of the frame.
2
Q
MAC address.
A
3
Q
Half-duplex.
A
4
Q
Full-duplex.
A
5
Q
CSMA/CD.
A
- CS - Carrier Sense
- Is there a carrier? Is anyone communicating?
- MA - Multiple Access
- More than one device on the network
- CD - Collision Detect
- Collision - Two stations talking at once • Identify when data gets garbled
6
Q
CSMA/CD Operation.
A
7
Q
CSMA/CA
A
8
Q
The Switch.
A
