World of Computer Networking Your CCNA start - Protocol Data Units (PDUs)

The video tutorial explains the concept of Protocol Data Units (PDUs) and their role in the OSI model. It begins with an introduction to bits as the smallest unit of data transmission in the physical layer. The OSI model is divided into media and host layers, with each layer having specific PDUs: frames for the data link layer, packets for the network layer, segments for the transport layer, and data for the application, presentation, and session layers. The tutorial also covers various protocols used in these layers, such as HTTP, FTP, TCP, and UDP, and their interaction with PDUs. The session concludes with a summary of the key points discussed.

What is the smallest piece of information that can be transmitted over physical media?

• Byte

• Packet

• Bit

• Frame

Which layers of the OSI model are considered media layers?

• Transport, Network, Data Link

• Transport, Session, Application

• Physical, Data Link, Network

• Application, Presentation, Session

What is the PDU for the data link layer?

• Packet

• Segment

• Data

• Frame

Which PDU is associated with the transport layer?

• Frame

• Packet

• Data

• Segment

Which protocols use data as their PDU?

• TCP and UDP

• Ethernet and Wi-Fi

• HTTP and FTP

• IP version 4 and IP version 6

What is the role of the session layer in the OSI model?

• Physical addressing

• Data transmission

• Session establishment and control

• Data encoding

Which layer uses packets as its PDU?

• Transport Layer

• Data Link Layer

• Application Layer

• Network Layer