CCNA v3.0 Semester 3 Chapter 4 Study Guide
4.1 Introduction to Ethernet/802.3 LANs
4.1.1
What is the purpose of a hub?
4.1.1
What is the negative aspect of
introducing a hub to a network?
4.1.1
What is the purpose of a switch?
4.1.1. What are the prerequisites for a
collision free Ethernet segment?
4.1.1
What is the disadvantage of a switch?
4.1.1
What is the purpose of a router?
4.1.2
What factors have impacted on
network performance?
4.1.3
Describe the frame delivery on 802.3
networks
4.1.3
What is the purpose of CSMA/CD
4.1.3
What types of applications can create
network congestion?
4.1.3
What increases the latency of frame
transmission?
4.1.4
What happens when a collision is
detected on a 802.3 network?
4.1.5
What can relieve network congestion?
4.1.6
What causes latency?
4.1.7
Define 1 bit time
4.1.8
What creates a full duplex
connection?
4.1.8
Why is half-duplex Ethernet only 50—
60% efficient?
4.1.8
Why is full duplex Ethernet 100%
efficiency?
4.2 LAN segmentation
4.2.1
What is another name for a layer 2
LAN segment?
4.2.1
What is the purpose of segmentation?
4.2.2
What is the impact on a LAN of a
bridge?
4.2.3
How do switches & routers handle
broadcasts?
4.2.4
4 hosts connected to a hub which
connects to 1 switchport are part of
what?
4.2.4
What is a virtual circuit?
4.2.7
Where is a switching table stored?
4.2.7
What type of network offers more
flexible traffic flow?
4.2.7
What is “wire speed” switching
4.2.8
What is the requirement of a switch
that switches asymmetrically
4.2.9
Why is shared memory buffering more
efficient that port based?
4.2.10 Describe store & Forward Switching
4.2.10 Describe fast-forward cut through
switching
4.2.10 Describe fragment-free cut through
switching
4.2.10 Compare latency in the 3 different
switching types
4.2.11 Why is the latency of fragment-free
and store and forward switching not
necessarily undesirable?
4.3 Switch Operation
4.3.1
How do switches ensure that users
have more bandwidth?
4.3.3
What happens when a switch is
turned on?
4.3.3
What information does a switch
address table contain?
4.3.3
How are timestamps used?
4.3.3
What happens if a destination MAC
address is not found on an address
table?
4.3.4
What is a broadcast storm?
4.3.6
What effect do bridges and switches
have on broadcast domains?
4.3.7
What effect does microsegmentation
have on collision domains?
4.3.8
How many collision domains are
created by a 24 port switch?