Chapter 6 Ethernet Frame
Which two devices would commonly be found at the access layer of the hierarchical enterprise LAN design model? (Choose two.)
1. Layer 2 switch 2. access point
Which three fields are found in an 802.3 Ethernet frame? (Choose three.)
1. frame check sequence 2. destination physical address 3. source physical address
How much data can be encapsulated into a normal sized Ethernet frame before it is sent over the network?
46 to 1500 bytes
Forward the frame out all ports except the incoming port
ARP request
Which statement is true about broadcast and collision domains?
Adding a switch to a network will increase the size of the broadcast domain.
Ethernet switches make their forwarding decision based on what field of the Ethernet frame?
Destination MAC address
The destination MAC address of an Ethernet broadcast in hexadecimal is:
FFFF.FFFF.FFFF
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF
When a switch receives an Ethernet frame and the destination MAC address of that frame is not in its MAC address table, the switch will
Forward the frame out all ports except in the incoming port.
When an Ethernet switch receives a frame that is broadcast, it will:
Forward the frame out all ports except the incoming port
Host-A sends an ARP request and receives an ARP reply from Host-B. What is in the ARP reply that Host-A did not know and needs to communicate with Host-B?
Host B's MAC address
The Ethernet protocol is at what layer of the OSI Model?
Layer 2 Data Link
Which Ethernet frame field indicates the beginning of an Ethernet frame?
Preamble and SFD
Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?
SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.
Host-B receives an ARP request. Host-B will return an ARP Reply if:
The IP address in the ARP request matches its own IP address.
When an Ethernet frame is sent out an interface, the destination MAC address indicates:
The MAC address of the device, which is on this network, that will receive the Ethernet frame
An ARP request is sent out as:
a broadcast, so all devices on the same network will receive it
Which design layer provides connectivity to devices on an Ethernet LAN?
access
The process of prepending protocol information with information from another protocol is called:
encapsulation
Which term refers to the process of placing one message format inside another message format?
encapsulation
What is the purpose of the core layer in the Cisco hierarchical network design model?
high-speed backbone switching
Which portion of an IP address uniquely identifies that device on that network?
host
An IP address is considered what type of address:
logical
Ethernet hubs are considered:
obsolete
An Ethernet MAC address is considered what type of address:
physical
Which address does not change when a device is connected to a new network?
physical
Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
router
Ethernet switches add entries to their MAC address table based on what field of the Ethernet frame?
source MAC address
What information does an Ethernet switch examine and use to build its address table?
source MAC address
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 purpose of ARP in an IPv4 network
to obtain a specific MAC address when an IP address is known
