Exam Preparation Tasks

Review All the Key Topics

Review the most important topics from inside the chapter, noted with the Key Topic icon in the outer margin of the page. Table 3-4 lists these key topics and the page numbers where each is found.

Table 3-4. Key Topics for Chapter 3

Key Topic Element	Description	Page Number
List, Figure 3-2	Common coaxial connectors	61
List	Categories of UTP cabling	64
List, Figure 3-5	Common twisted-pair connectors	65–66
Figure 3-7	Light propagation in multimode fiber	68
Figure 3-8	Light propagation in single-mode fiber	69
List, Figure 3-9	Common fiber-optic connectors	69–70
Figure 3-10	Example: Cable distribution system	71
List	Three types of Ethernet hubs	74
Figure 3-14	Ethernet hub	75
Figure 3-15	Ethernet bridge	76
Figure 3-26	Layer 2 Ethernet switch	83
Figure 3-27	Multilayer Ethernet switch	84
Figure 3-28	Router	85
Table 3-1	Network infrastructure device characteristics	85
Figure 3-29	VPN concentrator	86
Figure 3-30	Firewall	87
Figure 3-31	DNS server	88
Figure 3-32	Hierarchical domain name structure	89
Table 3-2	Common DNS record types	89
Step list	Obtaining IP address information from a DHCP server	91
Figure 3-34	Proxy server operation	92
Figure 3-35	Content engine operation	94
Figure 3-36	Content switching operation	94
Figure 3-37	Virtual server	96
Figure 3-38	Virtual server with a virtual switch	97
Figure 3-39	Virtual desktop topology	98
Figure 3-40	Sample VoIP network topology	99
Table 3-3	VoIP network elements	100