List of Figures

Chapter 1: Network Fundamentals

Figure 1.1: A small LAN

Figure 1.2: A sample network including servers and workstations

Figure 1.3: A peer-to-peer network

Figure 1.4: A client/server network

Figure 1.5: An example of a physical bus topology

Figure 1.6: A typical star topology with a hub

Figure 1.7: A typical ring topology

Figure 1.8: A typical mesh topology

Figure 1.9: An example of an ad hoc RF network

Figure 1.10: An example of an RF multipoint network

Figure 1.11: Backbone and segments on a sample network

Figure 1.12: Thicknet and vampire taps

Figure 1.13: An N-series connector

Figure 1.14: A stripped-back Thinnet

Figure 1.15: A male and female BNC connector

Figure 1.16: RJ-11 and RJ-45 connectors

Figure 1.17: An example of an ST connector

Figure 1.18: A sample SC connector

Chapter 2: The OSI Model

Figure 2.1: The Open Systems Interconnect (OSI) model

Figure 2.2: How data travels through the layers of the OSI model

Figure 2.3: A sample physical bus topology

Figure 2.4: A physical star topology

Figure 2.5: A physical ring topology

Figure 2.6: A physical mesh topology

Figure 2.7: A sample network interface card

Figure 2.8: A repeater installed on a network

Figure 2.9: The 5-4-3 Rule for network repeaters

Figure 2.10: A standard hub

Figure 2.11: MAUs in a Token Ring network

Figure 2.12: Sublayers of the Data Link layer

Figure 2.13: The IEEE standards’ relationship to the OSI model

Figure 2.14: A sample network before and after bridging

Figure 2.15: A switch builds a table of all MAC addresses of all connected stations

Figure 2.16: Address conflicts on a network

Figure 2.17: Routing components

Figure 2.18: Initiating communications using a connection-oriented service

Chapter 3: TCP/IP Fundamentals

Figure 3.1: A comparison of the seven-layer OSI model, the four-layer DoD model, and how TCP/IP maps to each model

Figure 3.2: A datagram with its TCP header

Figure 3.3: A datagram with TCP and IP headers

Figure 3.4: The components in a TCP/IP block diagram

Figure 3.5: The IP address structure

Figure 3.6: How a proxy server works

Figure 3.7: The IP Address tab of the TCP/IP Properties dialog box

Figure 3.8: The Bindings tab of the TCP/IP Properties dialog box

Figure 3.9: The Gateway tab of the TCP/IP Properties dialog box

Figure 3.10: The WINS Configuration tab of the TCP/IP Properties dialog box

Figure 3.11: The DNS Configuration tab of the TCP/IP Properties dialog box

Chapter 4: TCP/IP Utilities

Figure 4.1: Output of the netstat command without any switches

Figure 4.2: Sample output of the netstat -a command

Figure 4.3: Sample output of the netstat -e command

Figure 4.4: Sample output of the netstat -r command

Figure 4.5: Sample output of the nbtstat -a command

Figure 4.6: Sample output of the nbtstat -c command

Figure 4.7: Sample output of the nbtstat -n command

Figure 4.8: Sample output of the nbtstat -r command

Figure 4.9: Sample output of the nbtstat -S command

Figure 4.10: Sample output of the nbtstat -s command

Figure 4.11: Sample output produced by using the /all switch

Figure 4.12: Sample tracert output

Figure 4.13: The Windows 95/98 and NT Telnet utility

Figure 4.14: Using Telnet to find out if your SMTP mail system is responding

Chapter 5: Major Network Operating Systems

Figure 5.1: The NetWare command-line console

Figure 5.2: The Monitor menu-based utility

Figure 5.3: The NetWare architecture

Figure 5.4: A sample NDS Tree

Figure 5.5: A NetWare Administrator screen

Figure 5.6: Sample network and a sample NDS tree

Figure 5.7: Gateway Services for NetWare (GSNW) operation

Figure 5.8: Windows NT architecture

Figure 5.9: An NTDS network

Figure 5.10: User Manager for Domains

Figure 5.11: The basic Macintosh GUI

Figure 5.12: Mac OS X

Chapter 6: Network Installation and Upgrades

Figure 6.1: Comparing a power spike and a power surge

Figure 6.2: Comparing power underage problems

Figure 6.3: A sample log file from the Windows NT Event Viewer

Figure 6.4: A typical UTP installation

Figure 6.5: A sample DB-25 female SCSI connector

Figure 6.6: Male Centronics-50 SCSI connector

Figure 6.7: A high-density, 68-pin SCSI connector

Figure 6.8: A sample male and female D-type connector

Figure 6.9: A sample BNC connector

Figure 6.10: A typical RJ-45 connector

Figure 6.11: An IBM data connector

Figure 6.12: A jumper and how it is used

Figure 6.13: The DIP switch

Figure 6.14: The Select Network Component Type window

Figure 6.15: Selecting the software you want to install

Figure 6.16: Choosing a primary network logon

Figure 6.17: The Network and Dial-up Connections window

Figure 6.18: NDC with the NetWare client and NWLink installed

Figure 6.19: The NetWare default server/tree option screen

Figure 6.20: An example of a crimper

Figure 6.21: Using a punchdown tool

Figure 6.22: An example of a punchdown tool

Chapter 7: WAN and Remote Access Technologies

Figure 7.1: A local PSTN (or POTS) network

Figure 7.2: A typical frame relay configuration

Figure 7.3: A PPTP implementation connecting two LANs over the Internet

Figure 7.4: A workstation is connected to a corporate LAN over the Internet using PPTP

Chapter 8: Network Access and Security

Figure 8.1: Two networks with an ACL-enabled router

Figure 8.2: A firewall with a DMZ

Figure 8.3: Protocol switching with and without a dead zone

Figure 8.4: A hacker denied by a dynamic state list

Figure 8.5: A packet going to a proxy

Figure 8.6: IP spoofing

Figure 8.7: Public key encryption

Chapter 9: Fault Tolerance and Disaster Recovery

Figure 9.1: Disk mirroring

Figure 9.2: Disk duplexing

Figure 9.3: How disk striping works

Figure 9.4: The amount of data backed up with a full backup

Figure 9.5: The amount of data backed up in a differential backup

Figure 9.6: The amount of data backed up with an incremental backup

Figure 9.7: Grandfather-Father-Son rotation

Chapter 10: Network Troubleshooting

Figure 10.1: TCP/IP DNS properties for the misconfigured workstation

Figure 10.2: A sample CONSOLE.LOG file

Figure 10.3: Sample Log event types and their associated icons

Figure 10.4: A sample System Log (note the different error types and event IDs)

Figure 10.5: The Event Detail dialog box for an event listed in Figure 10.4

Figure 10.6: The Security Log in Event Viewer

Figure 10.7: The Security Log event types and their associated icons

Figure 10.8: A sample Application event log

Figure 10.9: A standard Ethernet 10BaseT cable

Figure 10.10: A standard Ethernet 10BaseT crossover cable

Figure 10.11: A hardware loopback and its connections

Figure 10.12: Use of a common tone generator and locator