11 - Communications
No description yet. This curated deck is ready for daily study.
Card preview (21)
What does USB stand for?
Universal Serial Bus
What is meant by serial transmission of data?
Bits are sent one after another
What is meant by parallel transmission of data?
Bits transferred simultaneously
What is a handshaking protocol?
Set of rules for sending signals between devices
Name two signals used in a handshaking protocol.
• Acknowledge data received by the printer • Error
What is the relationship between bandwidth and bit rate?
Greater the bandwidth, the higher the bit rate
What is baud rate in data transmission?
Speed of serial transmission; number of signal changes per second
Define bit rate.
The number of bits transferred per second
Define bandwidth.
Range of frequencies a channel can handle
Explain the modes of network operation of Baseband.
Single data signal sent at a time over full bandwidth
Explain the modes of network operation of Broadband.
Several data signals sent simultaneously, each at a different frequency
How can the bit rate be higher than the baud rate?
Each signal change represents more than one bit of data
What is latency in data communications?
Time delay between initiation and effect
What is the relationship between bit rate and baud rate?
2:1, depending on how many bits are used
What is a protocol?
Set of rules about the way devices communicate
Describe synchronous transmission.
Components share a common clock and are continuously synchronized
What is the purpose of the start bit in asynchronous serial transmission?
Start the receiver clock ticking
What is the purpose of the stop bit in asynchronous serial transmission?
Provides time for the receiver to process the received data
Explain the difference between asynchronous and synchronous communication.
Asynchronous: not synchronized by a common clock; Synchronous: continuously synchronized by a common clock
Why might browsing the Internet be slower at a public hotspot?
• Speed is limited for each connected device • More clients connecting to one access point
Explain peer-to-peer networking.
No dedicated servers; all computers are equal, functioning as both clients and servers