chap 1

What is the Internet?

• A worldwide phone service.

• A single network that connects computers globally.

• A vast network of networks that connects millions of computers globally.

• A global satellite system.

Which of the following is a function of the Internet?

• Providing physical or wireless connections between computers.

• Offering services to applications like email, web browsing, and voice over IP.

• Ensuring that messages are delivered in a sequential manner.

• Storing information online.

What is a protocol in the context of computer networks?

• A method for charging for Internet use.

• A set of rules that defines how data is formatted and processed on a network.

• A type of connection used in physical networking.

• A software program for managing network security.

Which type of network access is used by smartphones?

• Dial-up

• DSL

• Fiber-optic

• Mobile wireless access

What is the role of physical media in a network?

• To provide security services for data transmission.

• To offer software applications for network management.

• To carry bits through wired or wireless transmission.

• To manage network protocols.

Packet switching involves:

• Sending data in a single block over a dedicated circuit.

• Dividing data into blocks and sending each block independently.

• Encrypting data before transmission.

• Transmitting data without checking for errors.

Circuit switching is characterized by:

• The establishment of a dedicated path for the duration of a connection.

• Data being divided into packets and sent separately.

• The use of encryption to secure data paths.

• Random paths for data transmission.

In the context of packet-switched networks, what is throughput?

• The total amount of data that can be stored on the network.

• The delay from the source to the destination.

• The rate at which data is successfully delivered over a network channel.

• The physical distance between the source and destination.

Which of the following best describes encapsulation in network protocols?

• Encrypting data for secure transmission.

• Storing data in a structured format for networking.

• Wrapping data with protocol information at each layer of the OSI model.

• Compressing data to speed up transmission.

Networks under attack might face issues such as:

• Increased throughput.

• Improved latency.

• Unauthorized access and data breaches.

• Enhanced data encapsulation.