Communication and Internet Technologies Flashcards
1
Q
Types of transmissions of data
A
- Synchronous
- Asynchronous
2
Q
Define Synchronous
A
- Continus stream of data
- Ensures sender and reciever are synchronised
- Faster than Asynchronous
- Uses internal CLock
3
Q
Define Asynchronous
A
- Data bots are grouped and sent with control bits
- Reciever knows where the data starts and ends, prevents mixing of data
4
Q
Serial Transmission
A
- Data is sent one bit at a time over a single wire
- Good over long distances
- Slower rate (See USB)
5
Q
Parallel Transmission
A
- Several bits are sent over several wires simultaneously
- Good for short distance
- Faster method
- Synchronous (Stream of data)
6
Q
Simplex
A
- One direction (Computer to Printer)
7
Q
Half - Duplex
A
- Both directions but not at the same time (Phone conversations, one person at a time)
8
Q
Full - Duplex
A
- Both directinals simultaneously (Broad Band connection on phone line)
9
Q
How can data be transferred
A
- Using fiber optics
- Using copper wires
10
Q
Copper vs Fiber optics
A
- Fiber is faster, more flexible, better for long distances
- Copper is more common thereby cheaper
