Module 7 Practice Flashcards
Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64?
Data Fields
Which part of an Ethernet frame detects errors in the frame?
Frame Check Sequence
Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated?
EtherType
Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?
Preamble
Which data link sublayer controls the network interface through software drivers?
LLC
Which data link layer works with the upper layers to add application information for delivery of data to higher level protocols?
LLC
What is a function of the MAC sublayer?
- controls access to the media
- checks for errors in received bits
- uses CSMA/CD or CSMA/CA to support Ethernet technology
What are two methods for switching data between ports on a switch?
- cut-through switching
- store-and-forward switching
Which switching method can be implemented using fast-forward switching or fragment-free switching?
cut-through switching
Which two types of memory buffering techniques are used by switches?
- port-based memory buffering
- shared memory buffering
What feature automatically negotiates the best speed and duplex setting between interconnecting devices?
Autonegotiation
Which two characteristics describe Ethernet technology?
- It is supported by IEEE 802.3 standards.
- It uses the CSMA/CD access control method.
What statement describes a characteristic of MAC addresses?
They must be globally unique.
Which function or operation is performed by the LLC sublayer?
It communicates with upper protocol layers.
Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table?
Switch
What is the special value assigned to the first 24 bits of a multicast MAC address transporting an IPv4 packet?
01-00-5E
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?
It will discard the frame.
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?
Switch
What happens to runt frames received by a Cisco Ethernet switch?
The frame is dropped.
What type of address is 01-00-5E-0A-00-02?
an address that reaches a specific group of hosts
What addressing information is recorded by a switch to build its MAC address table?
the source Layer 2 address of incoming frames
What is auto-MDIX?
a feature that detects Ethernet cable type
Which statement is true about MAC addresses?
The first three bytes are used by the vendor assigned OUI.
What are the two sizes (minimum and expected maximum) of an Ethernet frame?
64 bytes - 1518 bytes
Which two functions or operations are performed by the MAC sublayer?
- It is responsible for Media Access Control.
- It adds a header and trailer to form an OSI Layer 2 PDU.
