Cisco 1, Module 6

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

• TCP/IP protocol stack

• IP address

• attached Ethernet cable

• MAC address

• RJ-45 port

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

• MAC address

• TCP port number

• UDP port number

• sequence number

• IP address

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)

• Electronic Industries Alliance (EIA)

• Internet Assigned Numbers Authority (IANA)

• Internet Society (ISOC)

• Internet Telecommunication Union (ITU)

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

• It provides media access control and performs error detection.

• It fragments data packets into the MTU size.

• It determines the path to forward packets.

• It accepts Layer 3 packets and encapsulates them into frames

• It monitors the Layer 2 communication by building a MAC address table.

What is true concerning physical and logical topologies?

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

• Physical topologies display the IP addressing scheme of each network.

• Physical topologies are concerned with how a network transfers frames.

• The logical topology is always the same as the physical topology.

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

• the development of half-duplex switch operation

• the use of CSMA/CA

• the virtually unlimited availability of IPv6 addresses

• the use of Gigabit Ethernet speeds

• the use of full-duplex capable Layer 2 switches

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

• CSMA/CA

• priority ordering

• CSMA/CD

• token passing

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

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

• Data that is transmitted over the network flows in one direction to many different destinations simultaneously.

• Data that is transmitted over the network flows in both directions at the same time.

• Data that is transmitted over the network can only flow in one direction.

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

• to define the media access processes that are performed by the hardware

• to identify which network layer protocol is being used

• to provide data link layer addressing

• to accept segments and package them into data units that are called packets

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

• determinism

• token passing

• CSMA/CD

• turn taking