ITN Unit 6

What is contained in the trailer of a data-link frame?

• logical address

• physical address

• data

• error detection

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

• They all include the flow control and logical connection fields.

• Ethernet frame header fields contain Layer 3 source and destination addresses.

• They vary depending on protocols.

• They include information on user applications.

Which statement describes a service provided by the data link layer?

• It defines the end-to-end delivery addressing scheme.

• It maintains the path between the source and destination devices during the data transmission.

• It manages the access of frames to the network media.

• It ensures that application data will be transmitted according to the prioritization.

• It provides reliable delivery through link establishment and flow control.

Which statement describes the services provided by the data link layer?

• It defines the end-to-end delivery addressing scheme.

• It maintains the path between the source and destination devices during the data transmission.

• It packages various Layer 3 PDUs into a frame format that is compatible with the network interface.

• It provides reliable delivery through link establishment and flow control.

• It ensures that application data will be transmitted according to the prioritization.

The Physical Layer handles Bits the Data-Link Layer handles...

(a)  

What is the function of the CRC value that is found in the FCS field of a frame?

• to verify the integrity of the received frame

• to verify the physical address in the frame

• to verify the logical address in the frame

• to compute the checksum header for the data field in the frame

Which two fields or features does Ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC?

• auto-MDIX

• source MAC address

• Frame Check Sequence

• minimum frame size

Which media communication type does not require media arbitration in the data link layer?

• deterministic

• half-duplex

• full-duplex

• controlled access

What is a characteristic of the LLC sublayer?

• It provides the logical addressing required that identifies the device.

• It provides delimitation of data according to the physical signalling requirements of the medium.

• It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.

• It defines software processes that provide services to the physical layer.

During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

• An IP address is added.

• The logical address is added.

• The physical address is added.

• The process port number is added.