Chapter 6

Which statement is true about the CSMA/CD access method that is used in Ethernet?

All network devices must listen before transmitting.

Which two functions are performed at the LLC sublayer of the OSI data link layer? (Choose two.)

Enables IPv4 and IPv6 to utilize the same network interface and media. Places information in the frame that identifies which network layer protocol is being used for the frame.

What are three ways that media access control is used in networking? (Choose three.)

Ethernet utilizes CSMA/CD. Media access control provides placement of data frames onto the media. Data link layer protocols define the rules for access to different media.

Which two statements describe the services provided by the data link layer? (Choose two.)

It packages various Layer 3 PDUs into a frame format that is compatible with the network interface. It manages the access of frames to the network media.

Which statement describes a characteristic of the frame header fields of the data link layer?

They vary depending on protocols.

Which three basic parts are common to all frame types supported by the data link layer? (Choose three.)

data trailer header

What three items are contained in an Ethernet header and trailer? (Choose three.)

error-checking information destination MAC address source MAC address

Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.)

Controls the NIC responsible for sending and receiving data on the physical medium. Implements a trailer to detect transmission errors.