Data and Digital Communications

What is defined as information that has been processed, organized, and stored in digital form?

A private data communications network used within a company is called a(n):

Who invented the telegraph, considered the first data communication system?

The evolution of the internet began in 1969 with a project funded by DARPA known as:

Who is credited with building the prototype for the World Wide Web?

In a typical corporate network architecture, what is the purpose of a DMZ (Demilitarized Zone)?

A set of rules governing the orderly exchange of data within a network is called a:

Which type of protocol requires a handshake procedure to establish a connection before data is transmitted?

TCP is an example of a __________ protocol.

Which protocol is more efficient for streaming video because it does not support error control or acknowledgments?

Which standards organization is responsible for the OSI Model and ISO 9000 quality standards?

The IEEE 802.3 and 802.11 standards define which technologies, respectively?

Which organization is the main standards development body for internet protocols, creating documents called RFCs?

In the OSI model, which layer is responsible for logical addressing and routing?

What is the PDU (Protocol Data Unit) at the Data Link Layer?

Encryption and data translation are functions of which OSI layer?

The Physical Layer of the OSI model is concerned with transmitting __________ over the physical medium.

Which OSI layer handles end-to-end data delivery and flow control using TCP or UDP?

In the TCP/IP model, the Process/Application layer corresponds to which three layers of the OSI model?

Which layer of the Cisco Three-Layer Model is considered the network backbone and is responsible for fast, reliable transport?

In the Cisco model, which layer provides workgroup connectivity and is responsible for access control?

What is the most common character encoding standard used today?

The original ASCII standard uses how many bits to represent a character?

In the ASCII table, codes 0-31 are known as what type of characters?

What is the decimal ASCII value for the character 'A'?

What is the 8-bit binary representation for the decimal ASCII code 72?

The decimal ASCII code 101 corresponds to which character?

What is the decimal difference between the ASCII codes for any lowercase letter and its uppercase counterpart?

The process of determining if errors have occurred during transmission is called:

Which error correction method involves the receiver requesting the sender to re-transmit the errored data?

Forward Error Correction (FEC) works by:

Which type of data transmission frames each character with its own start and stop bits, allowing for time gaps between characters?

In synchronous serial data, how does the receiver know where a block of data begins?

In the context of data communication hardware, a computer or printer is an example of:

What is the function of a DCE (Data Communication Equipment), such as a MODEM?

A UART (Universal Asynchronous Receiver/Transmitter) performs which key function in its transmitter section?

What is the function of the receiver (Rx) section of a UART?

What is the PDU at the Network Layer of the OSI model?

A firewall operates primarily at which layer of the OSI model?

Which of the following is an example of a proprietary (closed) standard?

MAC addresses are handled at which OSI layer?

The ASCII character 'z' has a decimal value of 122. What is its 8-bit binary representation?

A network that is a global, public data communications system is known as the:

Which of these is NOT a primary function of a UART?

The process of ensuring the receiver samples the incoming signal at the correct time is called:

The EIA/TIA is known for creating which important standard?

Which OSI layer establishes, manages, and terminates connections between applications?

What does the acronym EBCDIC stand for?

Which of the following is a function of the Transport Layer?

In the Cisco Three-Layer Model, the Distribution Layer provides a communication point between which two other layers?

The ASCII code for the space character is:

What is the hexadecimal equivalent of the decimal ASCII code 65?

The Baudot code, an early data communication code, used how many bits?

Which of the following is a method for error detection?

Which protocol is connectionless and does not guarantee delivery?