Module 7 Practice

Question 1

Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64?

Answer 1

Data Fields

Question 2

Which part of an Ethernet frame detects errors in the frame?

Answer 2

Frame Check Sequence

Question 3

Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated?

Answer 3

EtherType

Question 4

Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?

Answer 4

Preamble

Question 5

Which data link sublayer controls the network interface through software drivers?

Answer 5

LLC

Question 6

Which data link layer works with the upper layers to add application information for delivery of data to higher level protocols?

Answer 6

LLC

Question 7

What is a function of the MAC sublayer?

Answer 7

• controls access to the media
• checks for errors in received bits
• uses CSMA/CD or CSMA/CA to support Ethernet technology

Question 8

What are two methods for switching data between ports on a switch?

Answer 8

• cut-through switching
• store-and-forward switching

Question 9

Which switching method can be implemented using fast-forward switching or fragment-free switching?

Answer 9

cut-through switching

Question 10

Which two types of memory buffering techniques are used by switches?

Answer 10

• port-based memory buffering
• shared memory buffering

Question 11

What feature automatically negotiates the best speed and duplex setting between interconnecting devices?

Answer 11

Autonegotiation

Question 12

Which two characteristics describe Ethernet technology?

Answer 12

• It is supported by IEEE 802.3 standards.
• It uses the CSMA/CD access control method.

Question 13

What statement describes a characteristic of MAC addresses?

Answer 13

They must be globally unique.

Question 14

Which function or operation is performed by the LLC sublayer?

Answer 14

It communicates with upper protocol layers.

Question 14

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

Answer 14

Switch

Question 14

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

Answer 14

01-00-5E

Question 15

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

Answer 15

It will discard the frame.

Question 16

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

Answer 16

Switch

Question 17

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

Answer 17

The frame is dropped.

Question 18

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

Answer 18

an address that reaches a specific group of hosts

Question 18

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

Answer 18

the source Layer 2 address of incoming frames

Question 18

What is auto-MDIX?

Answer 18

a feature that detects Ethernet cable type

Question 19

Which statement is true about MAC addresses?

Answer 19

The first three bytes are used by the vendor assigned OUI.

Question 19

What are the two sizes (minimum and expected maximum) of an Ethernet frame?

Answer 19

64 bytes - 1518 bytes

Question 20

Which two functions or operations are performed by the MAC sublayer?

Answer 20

• It is responsible for Media Access Control.
• It adds a header and trailer to form an OSI Layer 2 PDU.