When a switch configuration includes a user-defined error threshold on a per-port basis, to which switching method will the switch revert when the error threshold is reached?
answer
store-and-forward
question
Which two functions or operations are performed by the MAC sublayer? (Choose two.)
answer
*Responsible for Media Access Control
*Adds a header and trailer to form an OSI Layer 2 PDU
question
Refer to the graphic. H2 has sent a broadcast message to all of the hosts. If host H1 wants to reply to the broadcast message, which statement is true?
answer
H1 sends a unicast message to H2 and the switch forwards it directly.
question
Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC3. In this scenario, what will happen next?
answer
RT1 will send an ARP reply with its own Fa0/0 MAC address.
question
The Ethernet ___________ sublayer is responsible for communicating directly with the physical layer.
answer
MAC
question
What is the decimal equivalent of the hexadecimal value of 3F?
answer
63
question
On Ethernet networks, the hexadecimal address FF-FF-FF-FF-FF-FF represents the
_______________
MAC address.
answer
broadcast
question
What is the primary purpose of ARP?
answer
resolve IPv4 addresses to MAC addresses
question
What type of address is 01-00-5E-0A-00-02?
answer
an address that reaches a specific group of hosts
question
When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?
answer
CRC in the trailer
question
A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?
answer
shared memory buffering
question
Refer to the exhibit. What is the destination MAC address of the Ethernet frame as it leaves the web server if the final destination is PC1?
answer
00-60-2F-3A-07-CC
The destination MAC address is used for local delivery of Ethernet frames. The MAC (Layer 2) address changes at each network segment along the path. As the frame leaves the web server, it will be delivered by using the MAC address of the default gateway
question
Fill in the blank using a number.
The minimum Ethernet frame size is
___________________
bytes. Anything smaller than that should be considered a "runt frame."
answer
64
question
Fill in the blank.
The binary number 0000 1010 can be expressed as
________________
in hexadecimal.
answer
a
question
Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?
answer
It sends the frame to all ports except the port on which it received the frame
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