Basics of Cyber Security and Networking

What is the primary function of the Network Layer in the OSI Model?

• Facilitates the transfer of data between devices on the same local network.

• Provides logical addressing and routing of data packets.

• Ensures reliable transmission of data across the network.

• Manages the physical connections and signaling between devices.

What are the key responsibilities of the Data Link Layer?

• Defines the electrical characteristics of the signal.

• Packages data into frames and adds error detection bits.

• Routes packets through the network.

• Establishes sessions between applications.

What is the function of the Network Layer?

• Routes packets through the network based on their destination addresses.

• Provides reliable end-to-end data delivery.

• Translates data between different formats.

• Establishes, manages, and terminates sessions.

What is a Personal Area Network (PAN)?

• Connects personal devices over a short range.

• Connects devices in a limited area like a home.

• Spans a larger area like a city or town.

• Covers a large geographical area like a country.

What are the pros and cons of Bus Topology?

• Simple to install and maintain, low cost.

• Single cable failure disables the entire network.

• Highly fault-tolerant, efficient data transmission.

• Complex to design and manage.

What is the function of the Application Layer?

• Provides network services directly to users.

• Translates data between different formats.

• Establishes sessions between applications.

• Routes packets through the network.

What is a Virtual Private Network (VPN)?

• Creates a secure tunnel over a public network.

• Connects buildings within a limited area.

• Offers high-speed data transfer.

• Connects smart home devices.

What is the foundational protocol suite of the Internet and most modern networks?

• Transmission Control Protocol/Internet Protocol (TCP/IP)

• Hypertext Transfer Protocol (HTTP)

• File Transfer Protocol (FTP)

• Simple Mail Transfer Protocol (SMTP)

What does the Domain Name System (DNS) do?

• Translates human-readable domain names into IP addresses

• Assigns IP addresses to devices

• Encrypts data for secure communication

• Manages email messages

What is the purpose of an IP address?

• Host or Network Identification

• Location Addressing

• Both Host Identification and Location Addressing

• None of the above