CCNA V3 Semester 3 Chapter 4 Study Guidie

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?