Question 1

The Internet was started by the U.S.Department of defense in 1969 as a network of four computers called ARPANET.

Accepted Answer

ARPANET was indeed started by the U.S. Department of Defense in 1969 as a network of four computers, which eventually became the foundation of the Internet.

Question 2

The OSI model is the most widely used network model to develop and build networks today.

Accepted Answer

The OSI (Open Systems Interconnection) model is a widely used network model for developing and building networks, providing a structured and standardized approach to network communication. It consists of seven layers, each with a specific function and interaction with the layers above and below it.

Question 3

Due to recent advances in high speed communication networks,the information lag,or the time it takes for information to be disseminated around the world,has been significantly shortened.

Accepted Answer

High speed communication networks, such as fiber optic cables and 5G wireless networks, allow for faster transmission of data and information across the globe, reducing the time it takes for information to be disseminated. This has led to a decrease in the information lag.

Question 4

An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.

Accepted Answer

An intranet is a private network that only allows authorized users within an organization to access information and resources. It is not publicly available to people outside of the organization.

Question 5

According to John Chambers,CEO of Cisco (a leading networking technology company),the information age is the second Industrial Revolution.

Accepted Answer

John Chambers, CEO of Cisco, referred to the information age as the second Industrial Revolution.

Question 6

The first electronic data communication system was the telephone developed by Alexander Graham Bell.

Accepted Answer

The first electronic data communication system was the telegraph, developed by Samuel Morse and others before the telephone.

Question 7

The first transcontinental telephone service was established in the 1940s.

Accepted Answer

The first transcontinental telephone service was established in 1915, not the 1940s.

Question 8

The application layer is the seventh layer of the Internet model and provides the end user's access to the network.

Accepted Answer

The application layer is indeed the seventh layer of the internet model and is responsible for providing end-user access to network services and applications.

Question 9

One perspective of data communications and networking as stated in the textbook,examines the management of networking technologies,including security,network design,and managing the network on a day-to-day basis and long term basis.

Accepted Answer

The textbook does state that one perspective of data communications and networking is the management of networking technologies, including security, network design, and managing the network on a day-to-day and long-term basis.

Question 10

An Inter-Exchange Carrier (IXC)provides only local telephone services to homes and businesses.

Accepted Answer

An Inter-Exchange Carrier (IXC) provides long-distance telephone services to homes and businesses, not local telephone services.

Question 11

Ethernet is an example of a network layer protocol.

Accepted Answer

Ethernet is a data link layer protocol.

Question 12

The Telecommunications Act of 1996 now permits the RBOCs to provide long distance outside the region in which they provide local telephone services.

Accepted Answer

The Telecommunications Act of 1996 did allow RBOCs (Regional Bell Operating Companies) to provide long distance services outside their region, as long as they met certain requirements and were approved by the FCC (Federal Communications Commission).

Question 13

Telecommunications is the transmission of voice and video as well as data and implies transmitting a longer distance than in a data communication network.

Accepted Answer

The answer of Telecommunications is the transmission of voice and...

Question 14

The network layer is responsible for routing messages from the source computer to the destination computer.

Accepted Answer

The network layer is responsible for providing logical addressing and routing of messages from the source computer to the destination computer in a computer network. It uses the Internet Protocol (IP) to encapsulate the data packets and forward them to the appropriate destination on the network.

Question 15

In the OSI model,the application layer is the end user's access to the network.

Accepted Answer

The application layer is the layer in the OSI model that interacts directly with the end user or application software. It provides services for user applications to access the network communication services. Therefore, the statement is true.

Question 16

Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.

Accepted Answer

This is a basic principle of the layered communication model where standard protocols and interfaces are used to enable communication between different layers of the network stack.

Question 17

Common carriers include the RBOCs,IXCs,and Cable TV companies.

Accepted Answer

Common carriers are companies that provide public telecommunications services to customers on a non-discriminatory basis. RBOCs (Regional Bell Operating Companies), IXCs (Interexchange Carriers), and Cable TV companies are all examples of common carriers in the telecommunications industry.

Question 18

At the transport layer in the Internet model,TCP is responsible for breaking large files received from the application layer into smaller packets and opening a connection to a server for transferring the packets.

Accepted Answer

TCP (Transmission Control Protocol) is responsible for breaking down large files into smaller packets and establishing a connection with the server for transferring the packets. TCP operates at the transport layer of the Internet model.

Question 19

A car manufacturer may give access to certain portions of its network to some of its suppliers via Internet.This is an example of an Extranet.

Accepted Answer

This statement is true. An Extranet is a private network that allows access to certain portions of a company's internal network to designated external parties, such as suppliers or customers. In this case, the car manufacturer is providing its suppliers with access to a portion of its network via the Internet, which is an example of an Extranet.

Question 20

A local area network (LAN)connects other LANs and BNs located in different areas to each other and to wide area networks in a span from 3 to 30 miles.

Accepted Answer

A local area network (LAN) is designed to connect devices within a limited area, such as a single building or campus, not to connect other LANs and wide area networks over larger distances.

Quiz 1: Introduction to Data Communications