6.4 Data Link Layer (Module Quiz)

What method is used to manage contention-based access on a wireless network?

CSMA/CA

Which data link layer media access control method does Ethernet use with legacy Ethernet hubs?

CSMA/CD

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

Data link

Which statement describes the half-duplex mode of data transmission?

Data that is transmitted over the network flows in one direction at a time.

Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)

Institute of Electrical and Electronics Engineers (IEEE) International Telecommunication Union (ITU)

What are two services performed by the data link layer of the OSI model? (Choose two.)

It accepts Layer 3 packets and encapsulates them into frames. It provides media access control and performs error detection.

What are the two sublayers of the OSI model data link layer? (Choose two.)

LLC MAC

What is true concerning physical and logical topologies?

Logical topologies refer to how a network transfers data between devices.

What attribute of a NIC would place it at the data link layer of the OSI model?

MAC address

What identifier is used at the data link layer to uniquely identify an Ethernet device?

MAC address

A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?

Mesh

What type of physical topology can be created by connecting all Ethernet cables to a central device?

Star

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

The use of full-duplex capable Layer 2 switches

Which is a function of the Logical Link Control (LLC) sublayer?

To identify which network layer protocol is being used