CHAPTER 11: SWITCHING AND VIRTUAL LANS

Question 1

When a switch is powered on in figure 11.6 what happens?P342

Answer 1

It does nothing because it has nothing in its MAC address forward/filter table.

Question 2

When the host starts communicating with the switch what happens?P342

Answer 2

It places the source hardware address of each frame in the table along with the port that the frame’s address corresponds to.

Question 3

How many steps are there on a forward filter table that becomes populated?P342

Answer 3

5

Question 4

What are the four steps on a forward.filter table that is populated?P342

Answer 4

Host A sends a frame to Host B,The switch receives the frame o the E0/0 interface and places the source address in the MAC address tabe,The frame is forwarded (flooded)out all interfaces- except the source port,Host B receives the frame and responds to host A. The switch receives the frame and places the source hardware address in the MAC database,Last now host A and B can make a point to point connection .

Question 5

Does host A and host B communicate with the switch wright away after is sends its information?P342Y/N

Answer 5

No It takes a certain amount time.

Question 6

The destination hardware address is known and listed in what?P343

Answer 6

The database

Question 7

No transmitting of the frame that preserves bandwidth on the other on the other networks segmants and are called what?P343

Answer 7

Frame filtering

Question 8

The destination MAC address will be found where?P344

Answer 8

IN the MAC address table and the frame will be forwarded out.

Question 9

If the MAC address is not found in the forward/filter table ,what happens?P344

Answer 9

It will forward the frame out all ports of the switch looking for the destination device.

Question 10

Redundant links between switches that are implemented are good why?P344

Answer 10

Because it helps prevent complete network failures in the event that one link stops working.

Question 11

If no loop avoidance schemes are put in place what happens?p344

Answer 11

The switches will be flooded with broadcasts endlessy throughout the internetwork.

Question 12

The flood of broadcast is sometimes referred to as what?P344

Answer 12

Broadcast storm

Question 13

Figure 11.8 illustrates what?P344

Answer 13

broadcast storm and how a broadcast can be propagated throughout the network.

Question 14

Figure 11.9 demonstrates what?P344

Answer 14

How a whole bunch of frames that can arrive from multiple segments simultaneously.

Question 15

What is the acronym of STP?P346

Answer 15

Spanning tree protocol

Question 16

STP is a layer 1 protocol that is used to maintain a loop-free switched network?P346 T/F

Answer 16

False

Question 17

In figure 11.10 you see what?P346

Answer 17

A switched network with a redundant tapology (switching loops).

Question 18

The port that sends and receives all data frames on the bridge port is what?P347

Answer 18

Forwarding

Question 19

Switches populate the MAC address table in the learning and —– — —?P347

Answer 19

forwarding modes only

Question 20

A ——- is what happens when all the ports on bridges and switches have transitioned to either forwarding or blocking modes?P

Answer 20

Convegencer