Mod 6/7 Quiz

What is the special value assigned to the first 24 bits of a multicast MAC address transporting an IPv4 packet?

01-00-5E

What are the two sizes (min and max) of an ethernet frame?

64 and 1518

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

CSMA/CA

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

CSMA/CD

What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?

It will discard the frame

What are the two sublayers of the OSI model data link layer?

LLC and MAC

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

MAC address

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

MAC address

What happens to runt frames received by a Cisco Ethernet switch?

The frame is dropped

Which function or operation is performed by the LLC sublayer? a. it communicates with upper protocol layers b. it performs data encapsulation c. it adds a header and trailer to a packet to form an OSI Layer 2 PDU d. it is responsible for media access control

a

What is auto-MDIX

a feature that detects Ethernet cable type

What are two services performed by the data link layer of the OSI model? a. It accepts Layer 3 packets and encapsulates them into frames. b. It provides media access control and performs error detection. c. It monitors the Layer 2 communication by building a MAC address table. d. It fragments data packets into the MTU size. e. It determines the path to forward packets.

a,b

Which two functions or operations are performed by the MAC sublayer? a. it is responsible for media access control b. it adds a header and trailer to form an OSI Layer 2 PDU c. it handles communications between upper and lower layers d. it performs the function of NIC driver software e. it adds control info to network protocol layer data

a,b

What type of address is 01-00-5E-0A-00-02?

an address that reaches a specific group of hosts

Which two characteristics describe Ethernet technology? a. It typically uses an average of 16 Mbps for data transfer rates b. It uses unique MAC addresses to ensure that data is sent to the appropriate destination c. It is supported by IEEE 802.3 standards d. It uses a ring topology e. It is supported by IEEE 802.5 standards

b,c

What is true concerning physical and logical topologies? a. Physical topologies are concerned with how a network transfers frames. b. Physical topologies display the IP addressing scheme of each network. c. Logical topologies refer to how a network transfers data between devices. d. The logical topology is always the same as the physical topology.

c

Which statement describes the half-duplex mode of data transmission? a. Data that is transmitted over the network flows in one direction to many different destinations simultaneously. b. Data that is transmitted over the network flows in both directions at the same time. c. Data that is transmitted over the network flows in one direction at a time. d. Data that is transmitted over the network can only flow in one direction.

c

Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.) a. Internet Society (ISOC) b. Electronic Industries Alliance (EIA) c. International Telecommunication Union (ITU) d. Internet Assigned Numbers Authority (IANA) e. Institute of Electrical and Electronics Engineers (IEEE)

c,e

What statement describes a characteristic of MAC addresses? a. They're only routable within the private network b. They have a 32 bit binary value c. They are added as part of a Layer 3 PDU d. They must be globally unique

d

Which is a function of the Logical Link Control (LLC) sublayer? a. to provide data link layer addressing b. to define the media access processes that are performed by the hardware. c. to accept segments and package them into data units that are called packets d. to identify which network layer protocol is being used

d

Which statement is true about MAC addresses? a. the ISO is responsible for MAC address regulations b. a NIC only needs a MAC address if connected to a WAN c. MAC addresses are implemented by software d. the first 3 bytes are used by the vendor assigned OUI

d

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

data link

A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?

mesh

What type of physical topology can be created by connecting all Ethernet cables to a central device?

star

Which network device has the primary function to send data to a specific destination based on the info found in the MAC address table?

switch

Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?

switch

What addressing information is recorded by a switch to build its MAC address table?

the source Layer 2 address of incoming frames

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

the use of full-duplex capable Layer 2 switches