CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

228 Switching Basics and Intermediate Routing CCNA 3 Labs and Study Guide
Switch Operation
The exercises in this section reinforce your knowledge of collision and broadcast domains. In addition,
you revisit the concept of picking the correct cable when connecting devices.
Vocabulary Exercise: Completion
Directions: Complete the paragraphs that follow by filling in appropriate words and phrases.
Even though the LAN switch reduces the size of collision domains, all hosts connected to the switch are
still in the same broadcast domain.
Communication in a network occurs in three ways. The most common way of communication is by
unicast transmissions, in which one transmitter tries to reach one receiver.
Another way to communicate is known as a multicast transmission, in which one transmitter tries to reach
only a subset, or a group, of the entire segment.
The final way to communicate is as a broadcast, in which one transmitter tries to reach all the receivers in
the network.
When a device wants to send out a Layer 2 broadcast, the destination MAC address in the frame is set to
all 1s. A broadcast MAC address is FF:FF:FF:FF:FF:FF in hexadecimal. By setting the destination to this
value, all the devices will accept and process the broadcasted frame.
Routers are used to segment both collision and broadcast domains.
Collision and Broadcast Domains Exercises
Using Figure 4-5, circle all the collision domains with a solid line and all the broadcast domains with a
dashed line.
Figure 4-5 Collision and Broadcast Domains: Topology 1
Broadcast Domain
Collision Domain
Using Figure 4-6, circle all the collision domains with a solid line and all the broadcast domains with a
dashed line.