Chapter 5 quiz
What is the decimal equivalent of the hexadecimal value of 3F?
.63 In order to convert a hexadecimal number to decimal, consider that the digit to the far right represents the 1s column where values 0 through F can appear. A hexadecimal value of A equals the decimal number 10. B equals 11, and so on through F equaling 15. The value of F in the number F equals 15. Next consider the value of 3 in the hexadecimal number of 3F. That place holder is the 16s column. Multiple the number 3 times 16 for a total of 48. Add 48 to 15 for the grand total of 63. Hexadecimal 3F equals a decimal value of 63.
The minimum Ethernet frame size is _____ bytes. Anything smaller than that should be considered a "runt frame."
64
On Ethernet networks, the hexadecimal address FF-FF-FF-FF-FF-FF represents the ________ MAC address.
Broadcast On Ethernet networks, the broadcast MAC address is 48 binary ones displayed as hexadecimal FF-FF-FF-FF-FF-FF.
When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?
CRC in the trailer
Which two functions or operations are performed by the MAC sublayer? (Choose two.)
It is responsible for Media Access Control It adds a header and trailer to form an OSI Layer 2 PDU.
Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?
It sends the frame to all ports except the port on which it received the frame.
The Ethernet _____ sublayer is responsible for communicating directly with the physical layer.
MAC
The binary number 0000 1010 can be expressed as ____ in hexadecimal.
OA
What type of address is 01-00-5E-0A-00-02?
an address that reaches a specific group of hosts The multicast MAC address is a special value that begins with 01-00-5E in hexadecimal. It allows a source device to send a packet to a group of devices.
What is the primary purpose of ARP?
resolve IPv4 addresses to MAC addresses
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?
shared memory buffering With shared memory buffering, the number of frames stored in the buffer is restricted only by the size of the entire memory buffer and not limited to a single port buffer. This permits larger frames to be transmitted with fewer dropped frames. This is important to asymmetric switching, which applies to this scenario, where frames are being exchanged between ports of different rates. With port-based memory buffering, frames are stored in queues that are linked to specific incoming and outgoing ports making it possible for a single frame to delay the transmission of all the frames in memory because of a busy destination port. Level 1 cache is memory used in a CPU. Fixed configuration refers to the port arrangement in switch hardware.
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?
store-and-forward
