A Cisco Catalyst switch has 24 10/100 ports, numbered 0/1 through 0/24. Ten PCs connect to the ten lowest numbered ports, with those PCs working and sending data over the network. The other ports are not connected to any device. Which of the following answers lists facts displayed by the show interfaces status command?
Port Ethernet 0/1 is in a connected state.
Port Fast Ethernet 0/5 is in a connected state.
Port Ethernet 0/16 is in a notconnected state.
Port Fast Ethernet 0/11 is in a connected state.
Which of the following statements best describes what a switch does with a frame destined for an unknown unicast address?
It forwards out all interfaces in the same VLAN except for the incoming interface.
It compares the destination IP address to the destination MAC address.
It compares the frame’s incoming interface to the source MAC entry in the MAC address table.
It forwards the frame out the one interface identified by the matching entry in the MAC address table.
After power on, a frame arrives at a switch. The switch had not yet learned the source MAC address of that frame. Which actions must the switch take in this case?
The switch checks the frame for loops.
The switch adds the destination MAC address to the MAC address table.
The switch adds the source and destination MAC address to the MAC address table.
The switch adds the source MAC address to its MAC table.
Which of the following statements describes part of the process of how a LAN switch decides to forward a frame destined for a broadcast MAC address?
It compares the unicast destination address to the bridging, or MAC address, table.
It compares the destination IP address to the destination MAC address.
It forwards the frame out all interfaces in the same VLAN except for the incoming interface.
It compares the unicast source address to the bridging, or MAC address, table.
Which of the following statements describes part of the process of how a switch decides to forward a frame destined for a known unicast MAC address?
It compares the destination IP address to the destination MAC address.
It forwards the frame out all interfaces in the same VLAN except for the incoming interface.
It compares the unicast destination address to the bridging, or MAC address, table.
It compares the frame’s incoming interface to the source MAC entry in the MAC address table.
Which of the following comparisons does a switch make when deciding whether a new MAC address should be added to its MAC address table?
It compares the unicast source address to the bridging, or MAC address, table.
It compares the VLAN ID to the bridging, or MAC address, table.
It compares the unicast destination address to the bridging, or MAC address, table.
It compares the destination IP address’s ARP cache entry to the bridging, or MAC address, table.
Consider the following output from a Cisco Catalyst switch:
The three listed MAC addresses were learned based on the destination MAC address of frames forwarded by the switch
The switch has learned three MAC addresses since the switch powered on.
The output proves that port Gi0/2 connects directly to a device that uses address 02BB.BBBB.BBBB.
02CC.CCCC.CCCC was learned from the source MAC address of a frame that entered port Gi0/3.
Analyzing Ethernet LAN Switching
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ETHERNET LAN SWITCHING CONCEPTS
| how a switch forwards frame destined for a known unicast MAC address? a. It compares the unicast destination address to the bridging, or MAC address, table. b. It compares the unicast source address to the bridging, or MAC address, table. c. It forwa | A. A switch compares the destination address to the MAC address table. If a matching entry is found, the switch knows out which interface to forward the frame. If no matching entry is found, the switch floods the frame. |
| Which of the following statements describes part of the process of how a LAN switch decides to forward a frame destined for a broadcast MAC address? a. It compares the unicast destination address to the bridging, or MAC address, table. b. It compares | C. A switch floods broadcast frames, multicast frames (if no multicast optimizations are enabled), and unknown unicast destination frames (frames whose destination MAC address is not in the MAC address table). |
| Which of the following statements best describes what a switch does with a frame destined for an unknown unicast address? a. It forwards out all interfaces in the same VLAN except for the incoming interface. b. It forwards the frame out the one interfa | A. A switch floods broadcast frames, multicast frames (if no multicast optimizations are enabled), and unknown unicast destination frames (frames whose destination MAC address is not in the MAC address table). |
| Which of the following comparisons does a switch make when deciding whether a new MAC address should be added to its bridging table? a. It compares the unicast destination address to the bridging, or MAC address, table. b. It compares the unicast sour | B. Switches learn MAC table entries by noting the source MAC address of each received frame and the interface in which the frame was received, adding an entry that contains both pieces of information (MAC address and interface). |
| switch begins w/no learned addresses, then by PC1 sending a frame w/a destination address of 2:. If the next frame to reach the switch is a frame sent by PC3, destined for PC2’s MAC address of 2:, which int out is the fram forwarded? a.Fa0/1. b.Fa0/ | A and B. |
| Which of the following devices would be in the same collision domain as PC1? a. PC2, which is separated from PC1 by an Ethernet hub b. PC3, which is separated from PC1 by a transparent bridge c. PC4, which is separated from PC1 by an Ethernet switch d | A. A collision domain contains all devices whose frames could collide with frames sent by all the other devices in the domain. Bridges, switches, and routers separate or segment a LAN into multiple collision domains, whereas hubs and repeaters do not. |
| Which of the following devices would be in the same broadcast domain as PC1? a. PC2, which is separated from PC1 by an Ethernet hub b. PC3, which is separated from PC1 by a transparent bridge c. PC4, which is separated from PC1 by an Ethernet switch d | A, B, and C. A broadcast domain contains all devices whose sent broadcast frames should be delivered to all the other devices in the domain. Hubs, repeaters, bridges, and switches do not separate or segment a LAN into multiple broadcast domains, wherea |
| Which of the following Ethernet standards support a maximum cable length of longer than 100 meters? a. 100BASE-TX b. 1000BASE-LX c. 1000BASE-T d. 100BASE-FX | b and d |