Data Packets
Data Packets
Give the three factors of the method of data transmission.
The direction of data transmission, the method of data transmission, the method of data synchronization
What are the three number systems we learned
Binary, Hexadecimal, and Denary
Describe the different directions of data transmission
Simplex is one direction only, Half-duplex is both directions but not at the same time, Full-duplex is both directions at the same time.
What are the three examples of error checking methods?
Parity Check, Echo Check, Checksum
Why do some data packets get lost during transmission? How do we solve it? State how this solution works.
Lost packets happened because of faulty connections between different routers. We can solve this using hopping wherein a max hop number is added in the header and get deducted by 1 when it leaves the router. It gets deleted once the hop number turns 0.
Describe the two methods of data transmission
Serial sends one bit at a time in a single wire. Parallel sends multiple bits at a time in several wires.
How does Parity Check works?
Parity checks work by counting the number of one's in a byte and then checks if it is correct based on the parity type which is either odd or even.
Describe packet switching
Packet switching is the transfer of small pieces of data across various networks. These data chunks or “packets” allow for faster, more efficient data transfer.
What is the meaning of USB?
Universal Serial Bus
How does echo check work? Who checks the data if it is correct?
Echo check works by sending back the original data from the receiver to the sender. The original sender is the one who checks the data if it is correct.
Why is packet switching important?
It reduces interference, faster transmission of data, scalable, adaptive in terms of rerouting due to faulty connections,
Why does parallel transmission cause skewing?
It causes skewing because data does not arrive in order or data arrives unsynchronized
How does ISBN 13 works? State the steps.
1. Add all odd position numbers.
2. Then add all even positioned numbers and then multiply by three.
3. Add steps 1 and 2
4. Divide the sum from step 3 by 10.
5. If the remainder is not 0, then subtract the remainder from 10. That will be the check digit.
If the remainder is 0, then that is the check digit.