CCNA 1 ITNv6 Chapter 5

At which layers of the OSI model does Ethernet function?

• • Application

• • Presentation

• • Session

• • Data link

• • Physical

Which standard specifies the Ethernet MAC sublayer functionality in a computer NIC?

• • IEEE 802.2

• • IEEE 802.3

• • IEEE 802.5

• • IEEE 802.11

• • IEEE 802.15

What is the name given to the Ethernet MAC sublayer PDU?

• • Segment

• • Packet

• • Frame

• • Bit

What are the primary functions associated with data encapsulation at the Ethernet MAC sublayer?

• • Media recovery

• • Frame deliminating

• • Addressing

• • Frame placement on the media

• • Error detection

What happens when a data collision occurs on an Ethernet bus?

• • The CRC value is used to repair the data frames.

• All devices stop transmitting and try again later

• • The device with the lower MAC address stops transmitting to give the device with the higher MAC address priority.

• The MAC sublayer prioritizes the frame with the lower MAC address

What is true about the Ethernet MAC address?

• • A MAC address is 32 bits in length.

• • The first 6 hexadecimal digits of a MAC address represent the OUI.

• • The IEEE is responsible for assigning vendors a unique 6-byte code.

• • The vendor is responsible for assigning the last 24 bits of the MAC address.

• • The MAC address is also known as a burned-in address.

What is the minimum and maximum Ethernet frame size as defined by IEEE 802.3?

• • 64 bytes – 1518 bytes

• • 64 bytes – 1522 byres

• • 32 bytes – 1518 bytes

• • 32 bytes – 1522 bytes

Which field in an Ethernet frame is used for error detection?

• • Preamble

• • Type

• • Destination MAC Address

• • Frame Check Sequence

Which address is used as a destination address on a broadcast Ethernet frame?

• • 0.0.0.0

• • 255.255.255.255

• • FF-FF-FF-FF-FF-FF

• • 0C-FA-94-24-EF-00

Which address is a multicast MAC address?

• • 0-07-E9-00-00-D4

• • 01-00-5E-00-00-C8

• • FF-FF-FF-FF-FF-FF

• • FF-FF-FF-01-00-5E