communication and networks Flashcards
What is the main difference between serial and parallel transmission?
In serial transmission, data is sent one bit at a time over a single channel, while in parallel transmission, multiple bits are sent simultaneously over multiple channels.
True or False: Serial transmission is generally faster than parallel transmission.
False: Parallel transmission can be faster than serial transmission, but it is more susceptible to signal degradation over longer distances.
Fill in the blank: In parallel transmission, data is transmitted over ______ channels.
multiple
Which of the following is an example of serial transmission? (A) USB (B) PCI (C) SATA
A) USB
What is one advantage of serial transmission over parallel transmission?
Serial transmission has a lower risk of crosstalk and electromagnetic interference, making it more reliable over long distances.
What is the primary characteristic of synchronous transmission?
Data is sent at regular intervals, synchronized by a clock signal.
True or False: Asynchronous transmission requires a clock signal for data transfer.
False
Fill in the blank: In asynchronous transmission, each data byte is typically framed by ______ and ______ bits.
start, stop
Which of the following is an example of synchronous transmission? A) UART B) I2C C) RS-232
B) I2C
What is one advantage of asynchronous transmission over synchronous transmission?
It allows for more flexible data transfer without needing a clock signal.
What is the primary difference between baseband and broadband transmission?
Baseband uses a single channel for transmission, while broadband uses multiple channels.
True or False: Baseband transmission can support long-distance communication without repeaters.
False
Fill in the blank: Broadband transmission allows for __________ of data over a single medium.
simultaneous transmission
Which of the following is an example of baseband technology? A) Ethernet B) DSL C) Cable Internet
A) Ethernet
What type of modulation is typically used in broadband communications?
Frequency Division Multiplexing (FDM)
what are the advantages of a wired LAN?
faster transmission of data than wireless
more security to interceptors
what are the disadvantages of a wireless LAN?
prone to interception
slower transmition thanwired LANs
what are the advantages of a wireless LAN?
freedom from wires
flexibility
