Layer 2 Flashcards
1
Q
MAC
A
Media Access Control Physical addressing system using 48-bit address Identifies physical device First 24 bits: vendor code Last 24 bits: unique value
2
Q
LLC
A
Logical Link Control
Provides connection services and acknowledgement of receipt of messages
Flow control
Error control
3
Q
Layer 3 communication synchronization
A
Isynchronous
Synchronous
Asynchronous
4
Q
Layer 2 Isynchronous
A
Devices use common reference clock source and create time slots for transmission
5
Q
Layer 2 synchronous
A
Network devices agree on clocking method to indicate beginning and end frames
6
Q
Layer 2 asynchronous
A
Devices reference their own internal clocks and use start/stop bits
7
Q
Examples of Layer 2 devices
A
MAC addresses
Network interface cards
Bridges
Switches
8
Q
Purpose of Layer 2
A
Packaging bits into frames
Transmit frames across networks
Error detection
Identifying MAC addresses
