PART 6: DATA LINK LAYER AND PHYSICAL LAYER

A frame is the data unit at which layer?

• Physical

• Network

• Data Link

• Transport

Error control and flow control are performed by:

• Network layer

• Data Link layer

• Physical layer

• Session layer

Which protocol is used to convert an IP address to a physical (MAC) address?

• ARP

• RARP

• ICMP

• TCP

The process for a host to automatically obtain an IP address from a server when connecting to a network is:

• The host broadcasts a "DHCP discover" message → The DHCP server responds with "DHCP offer" → The host sends a "DHCP request" → The DHCP server sends "DHCP ack."

• The host sends a "DHCP request" → The DHCP server sends "DHCP ack" → The host broadcasts a "DHCP discover" message → The DHCP server responds with "DHCP offer."

• The host broadcasts a "DHCP discover" → The DHCP server sends "DHCP ack" → The host sends a "DHCP request" → The DHCP server responds with "DHCP offer."

• The host sends a "DHCP request" → The DHCP server responds with "DHCP offer" → The host broadcasts a "DHCP discover" → The DHCP server sends "DHCP ack."

CSMA/CD is a random access method used for networks with which topology?

• Star (STAR)

• Bus

• Ring

• Hybrid BUS-STAR

CSMA/CD stands for:

• Collision Sense Multiple Access/Collision Detection

• Carrier Sense Multiple Access/Collision Deterrence

• Carrier Sense Multiple Access/Collision Detection

• Collision Sense Multiple Access/Carrier Detection

The first three bytes of a MAC address provide information about:

• The manufacturer of the network card (NIC)

• The geographical region of the network card

• The version number of the network card

• None of the above

Which network device connects networks and controls broadcasts?

• Ethernet switch

• Bridge

• Router

• Hub

Which of the following is a layer 2 address (MAC address)?

• 192.201.63.251

• 0000.1234.FEG

• 19-22-01-63-25

• 00-00-12-34-FE-AA

CSMA/CD is which type of access mechanism?

• Channel partitioning

• Random access

• Taking turns

• None of the above