Ch. 5: Analyzing Etheret LAN Switching Flashcards Preview

CCNA 200-301 > Ch. 5: Analyzing Etheret LAN Switching > Flashcards

Flashcards in Ch. 5: Analyzing Etheret LAN Switching Deck (17)
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1

broadcast frame

An Ethernet frame sent to destination address FFFF.FFF F.FFFF, meaning that the frame should be delivered to all hosts on that LAN.

2

known unicast frame

An Ethernet frame whose destination MAC address is listed in a switch’s MAC address table, so the switch will forward the frame out the one port associated with that entry in the MAC address table.

3

Spanning Tree Protocol (STP)

A protocol defined by IEEE standard 802.ID. Allows switches and bridges to create a redundant LAN, with the protocol dynamically causing some ports to block traffic, so that the bridge/switch forwarding logic will not cause frames to loop indefinitely around the LAN.

4

unknown unicast frame

An Ethernet frame whose destination MAC address is not listed in a switch’s MAC address table, so the switch must flood the frame.

5

MAC address table

A table of forwarding information held by a Layer 2 switch, built dynamically by listening to incoming frames and used by the switch to match frames to make decisions about where to forward the frame.

6

forward

To send a frame received in one interface out another interface, toward its ultimate destination.

7

flood/flooding

The result of the LAN switch forwarding process for broadcasts and unknown unicast frames. Switches forward these frames out all interfaces, except the interface in which the frame arrived. Switches also flood multicasts by default, although this behavior can be changed.

8

show mac address-table

Shows all MAC table entries of all typed

9

show mac address-table dynamic

Shows all dynamically learned MAC table entries

10

show mac address-table dynamic vlan (vlan-id)

Shows all dynamically learned MAC table entries in that VLAN

11

show mac address-table dynamic address (mac address)

Shows the dynamically learned MAC table entries with that MAC address

12

show mac address-table dynamic interface (interface-id)

Shows all dynamically learned MAC table entries associated with that interface

13

show mac address-table count

Shows the number of entries in the MAC table and the total number of remaining empty slots in the MAC table

14

show mac address-table aging-time

Shows the global and per-VLAN aging timeout for inactive MAC table entries

15

clear mac address-table dynamic

Empties the MAC table of all dynamic entries

16

show interfaces status

Lists one line per interface on the switch, with basic status and operating information for each

17

clear mac address-table dynamic [vlan vlan-number] [interface interface-id] [address mac-address]

Clears (removes) dynamic MAC table entries: either all (with no parameters), or a subset based on VLAN ID, interface ID, or a specific MAC address