Chapter 11 BB

Question 1

What is a collapsed backbone network design? Pg 336

Answer 1

All hosts involved had to go to the corporate backbone in order to reach any network services – both LAN and mainframe.

Question 2

What is a mainframe network? Pg 336

Answer 2

Comprised of dumb terminals connected into mainframe controllers. Any remote sites were connected to the mainframe with bridges.

Question 3

What was one of the first devices created to break up collision domains? Pg 337

Answer 3

Bridges

Question 4

T/F Switches use Application-Specific Integrated Circuits (ASICs) to create an manage a filter table. Pg 338

Answer 4

True

Question 5

What do switches do that hubs don’t? Pg 339

Answer 5

Create private, dedicated collision domains and provide independent bandwidth on each port.

Question 6

What are four benefits of layer 2 switching? Pg 339

Answer 6

hardware-based bridging, wire speed, low latency, low cost

Question 7

What makes layer 2 switching so efficient is that no _______ to the data packet takes place. Pg 339

Answer 7

modification

Question 8

What are two things to consider if you want to have a solid network design that includes bridges? Pg 340

Answer 8

You must break up the collision domains properly. A well-oiled, functional bridged network is one whose users spend 80 percent of their time on the local segment.

Question 9

What are the three distinct functions of layer 2 switching? Pg 340

Answer 9

• -Address Learning.
• -Forward/filter decisions.
• -Loop avoidance.

Question 10

What is address learning? Pg 341

Answer 10

Store the source hardware address of each frame received on an interface into a MAC database known as the forward/filter table.