Chapter 13 Flashcards
How we expand LAN extension
By employing relevant hardware components
What are 2 techniques used in fiber optic cable
- Electronic circuitry
2. Optical hardware driver
What Electronic circuitry do
Convert AUI signals to digital signals
What optical hardware driver do
Converts digital signals to light signals
What is role of fiber modem
It converts digital signal to light and convert them back.
Which equipment increase signal strength and transfer signals
Repeater
Can we increase the length of LAN by repeater for long distances
No
What is the maximum quantity of repeater we can use
4
What are disadvantages of repeater
- It also transfer collision
- It could not recognize complete and incomplete frame and also transfer them.
What is bridge
Bridge is an intelligent device unlike repeater. It distinguish between complete and incomplete frame. It is computer with 2 network interface cards. Bridge is expert in frame filtering.
What is frame filtering in bridge
Bridge builds its own table for frames
How does a bridge know on which segment a destination computer is attached
It keeps a lists for each segment that consists of physical addresses of the computers attached to that segment.
What bridges called learning bridges
Because they make their own table
Why there is distance limitation over network
Signal strength weak over traveling
