Chapter 7 ethernet switches
What is the special value assigned to the first 24 bits of a multicast MAC address? 01-5E-00 FF-00-5E FF-FF-FF 01-00-5E
01-00-5E
Which function or operation is performed by the LLC sublayer? It performs data encapsulation. It communicates with upper protocol layers. It is responsible for media access control. It adds a header and trailer to a packet to form an OSI Layer 2 PDU.
It communicates with upper protocol layers.
Which data link sublayer controls the network interface through software drivers? MAC LLC
LLC
Which data link sublayer works with the upper layers to add application information for delivery of data to higher level protocols? MAC LLC
LLC
Which part of an Ethernet Frame notifies the receiver to get ready for a new frame? Start of Frame Delimiter Frame Check Sequence Preamble Data field
Preamble
Which statement is true about MAC addresses? MAC addresses are implemented by software. A NIC only needs a MAC address if connected to a WAN. The first three bytes are used by the vendor assigned OUI. The ISO is responsible for MAC addresses regulations.
The first three bytes are used by the vendor assigned OUI.
What happens to runt frames received by a Cisco Ethernet switch? The frame is dropped. The frame is returned to the originating network device. The frame is broadcast to all other devices on the same network. The frame is sent to the default gateway.
The frame is dropped.
What statement describes a characteristic of MAC addresses? They must be globally unique. They are only routable within the private network. They are added as part of a Layer 3 PDU. They have a 32-bit binary value.
They must be globally unique.
What is auto-MDIX? a type of Cisco switch an Ethernet connector type a type of port on a Cisco switch a feature that detects Ethernet cable type
a feature that detects Ethernet cable type
Which switching method can be implemented using fast-forward switching or fragment-free switching? cut-off switching cut-through switching store-and-forward switching store-and-restore switching
cut-through switching
Which two types of memory buffering techniques are used by switches? (Choose two.) long-term memory buffering port-based memory buffering shared memory buffering short-term memory buffering
port-based memory buffering shared memory buffering
Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table? hub router switch modem
switch
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame? repeater hub switch router
switch
What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.) 56 bytes 64 bytes 128 bytes 1024 bytes 1518 bytes
64 bytes 1518 bytes
Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64 bytes? EtherType Preamble Start of Frame Delimiter Data field
Data field
Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated? EtherType Preamble Start of Frame Delimiter Frame Check Sequence
EtherType
Which part of an Ethernet frame detects errors in the frame? Preamble Start of Frame Delimiter Frame Check Sequence
Frame Check Sequence
Which two functions or operations are performed by the MAC sublayer? (Choose two.) It is responsible for Media Access Control. It performs the function of NIC driver software. It adds a header and trailer to form an OSI Layer 2 PDU. It handles communication between upper and lower layers. It adds control information to network protocol layer data.
It is responsible for Media Access Control. It adds a header and trailer to form an OSI Layer 2 PDU.
Which two characteristics describe Ethernet technology? (Choose two.) It is supported by IEEE 802.3 standards. It is supported by IEEE 802.5 standards. It typically uses an average of 16 Mb/s for data transfer rates. It uses the CSMA/CD access control method. It uses a ring topology.
It is supported by IEEE 802.3 standards. It uses the CSMA/CD access control method.
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. It will forward the frame to the next host. It will remove the frame from the media. It will strip off the data-link frame to check the destination IP address.
It will discard the frame.
What type of address is 01-00-5E-0A-00-02? an address that reaches every host inside a local subnet an address that reaches one specific host an address that reaches every host in the network an address that reaches a specific group of hosts
an address that reaches a specific group of hosts
What feature automatically negotiates the best speed and duplex setting between interconnecting devices? auto-MDIX autobots autonegotiation autotune
autonegotiation
What is a function of the MAC sublayer? (Choose three.) controls access to the media checks for errors in received bits uses CSMA/CD or CSMA/CA to support Ethernet technology communicates between software at the upper layers and the device hardware at the lower layers allows multiple Layer 3 protocols to use the same network interface and media
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? (Choose two.) cut-off switching cut-through switching store-and-forward switching store-and-supply switching store-and-restore switching
cut-through switching store-and-forward switching
What addressing information is recorded by a switch to build its MAC address table? the destination Layer 3 address of incoming packets the destination Layer 2 address of outgoing frames the source Layer 3 address of outgoing packets the source Layer 2 address of incoming frames
the source Layer 2 address of incoming frames