What is data communications?
The process of transmitting and receiving data between two or more devices
The process of storing data on a computer
The process of analyzing data for patterns and trends
The process of encrypting data for secure transmission
What is synchronous communication?
A type of communication where data is transmitted in a continuous stream
A type of communication where data is transmitted in discrete chunks
A type of communication that requires a clock signal for synchronization
A type of communication that uses parallel transmission
What is asynchronous communication?
A type of communication where data is transmitted in discrete chunks
A type of communication where data is transmitted in a continuous stream
A type of communication that requires a clock signal for synchronization
A type of communication that uses parallel transmission
What are the advantages of synchronous communication?
Higher data transfer rates
Less overhead due to start and stop bits
More efficient use of bandwidth
Flexibility in transmission speeds
Does not require synchronization between sender and receiver
What are the advantages of asynchronous communication?
Flexibility in transmission speeds
Does not require synchronization between sender and receiver
Allows for error detection and correction
Higher data transfer rates
More efficient use of bandwidth
What is the purpose of a modem in data communications?
To modulate and demodulate signals for transmission over a communication channel
To route data packets between networks
To convert digital signals to analog signals
To encrypt and decrypt data for secure transmission
What is the purpose of a router in data communications?
To route data packets between networks
To modulate and demodulate signals for transmission over a communication channel
To convert digital signals to analog signals
To encrypt and decrypt data for secure transmission
What is the purpose of error detection and correction in data communications?
To ensure the accuracy and integrity of transmitted data
To compress data for efficient transmission
To encrypt data for secure transmission
To convert analog signals to digital signals
What is the purpose of flow control in data communications?
To regulate the flow of data between sender and receiver to prevent data loss or congestion
To convert analog signals to digital signals
To compress data for efficient transmission
To encrypt data for secure transmission
What is the purpose of error detection and correction in data communications?
To ensure the accuracy and integrity of transmitted data
To compress data for efficient transmission
To encrypt data for secure transmission
To convert analog signals to digital signals
What is the purpose of flow control in data communications?
To regulate the flow of data between sender and receiver to prevent data loss or congestion
To convert analog signals to digital signals
To compress data for efficient transmission
To encrypt data for secure transmission
What is the purpose of error detection and correction in data communications?
To ensure the accuracy and integrity of transmitted data
To compress data for efficient transmission
To encrypt data for secure transmission
To convert analog signals to digital signals
What is the purpose of flow control in data communications?
To regulate the flow of data between sender and receiver to prevent data loss or congestion
To convert analog signals to digital signals
To compress data for efficient transmission
To encrypt data for secure transmission
What is the purpose of a network interface card (NIC) in data communications?
To connect a computer to a network
To store data
To process data
To display data
Which of the following are examples of wired communication media?
Ethernet cable
Fiber optic cable
Wi-Fi
Bluetooth
Satellite
What is the maximum data transmission speed of a Category 6 Ethernet cable?
10 Gbps
1 Gbps
100 Mbps
10 Mbps
What is the purpose of a firewall in data communications?
To protect a network from unauthorized access
To connect devices to a network
To transmit data between networks
To store data
What is the purpose of a DNS server in data communications?
To translate domain names into IP addresses
To encrypt data during transmission
To store and manage data
To connect devices to a network
Which of the following is an example of a public IP address?
203.0.113.1
192.168.0.1
10.0.0.1
172.16.0.1
What is the purpose of a VPN in data communications?
To create a secure connection over a public network
To connect devices to a network
To store and manage data
To translate domain names into IP addresses
What is the purpose of a proxy server in data communications?
To act as an intermediary between clients and servers
To connect devices to a network
To store and manage data
To translate domain names into IP addresses
What is the purpose of a MAC address in data communications?
To uniquely identify a network interface card (NIC)
To connect devices to a network
To store and manage data
To translate domain names into IP addresses
Which of the following is an example of a wireless communication standard?
Wi-Fi
Bluetooth
NFC
Ethernet
USB
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