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Appendix A Glossary Table of Contents 1000Base-CX Extremely fast (1000Mbps) Ethernet, typically strung via copper wire and capable of transmitting a distance of some 75 feet. 1000Base-LX Extremely fast (1000Mbps) Ethernet, typically strung via fiber-optic cable and capable of transmitting a distance of some 9,000 feet. 1000Base-SX Extremely fast (1000Mbps) Ethernet, typically strung via fiber-optic cable and capable of transmitting a distance of some 1,500 feet. 1000Base-TX Extremely fast (1000Mbps) Ethernet, typically strung via copper wire and capable of transmitting a distance of some 330 feet. 100Base-FX Fast (100Mbps) Ethernet, typically strung via fiber-optic cable and capable of transmitting a distance of some 412 meters. 100BaseT Fast (100Mbps) Ethernet, supporting various cabling schemes and capable of transmitting a distance of some 205 meters. 10Base2 Coaxial (thinwire) Ethernet capable of transmitting to distances of 600 feet. 10Base5 Coaxial (thickwire) Ethernet that, by default, transports data to distances of 1,500 feet. 10BaseT Twisted-pair Ethernet capable of transmitting to distances of some 205 meters. acceptable use policy (AUP) Originally established by the National Science Foundation, AUP once forbade use of the Internet for commercial purposes. Today, AUP refers to rules a user must adhere to when using an ISP’s services. access control Any tool or technique that allows you to selectively grant or deny users access to system resources. access control list (ACL) A list that stores security information about users and which system resources they’re allowed to access.
active hub An active hub is one that has intelligence built into it (for example, to make it error tolerant). See also hub. adapter A hardware device used to connect devices to a motherboard. In networking context, an Ethernet adapter/card. adaptive pulse code modulation A method of encoding voice into digital format over communication lines. adaptive routing Routing designed to adapt to the current network load. Adaptive routing routes data around bottlenecks and congested network areas. Address Resolution Protocol (ARP) Maps IP addresses to physical addresses. administrator Either a human being charged with controlling a network or the supervisory account in Windows NT. (Whoever has administrator privileges in NT can—but need not necessarily—hold complete control over his or her network, workgroup, or domain.) ADSL See Asymmetric Digital Subscriber Line. AIX A flavor of UNIX from International Business Machines (IBM). AIX runs on RISC workstations and PowerPCs. American National Standards Institute See ANSI. analog system This term is generally used to describe the telephone system, which uses analog technology to convert voice to electronic signals. Many telephones in modern office systems are digital, which means that if you plug your modem into the jack, you risk damage to the modem. Anonymous FTP FTP service available to the public that allows anonymous logins. Anyone can access anonymous FTP with the username anonymous and his or her email address as a password. ANSI The American National Standards Institute. Check out http://www.ansi/org for more information on ANSI. answer-only modem A modem that answers but cannot dial out. (These are useful for preventing users from initiating calls from your system.) applet A small Java program that runs in a Web browser environment. Applets add graphics, animation, and dynamic text to otherwise lifeless Web pages. application gateway Firewall device that disallows direct communication between the Internet and an internal, private network. Data flow is controlled by proxies that screen out undesirable information or hosts. See
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To access the contents, click the c
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Workshop Q&A Quiz Answers to Quiz Q
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Eminent Domain TCP/IP Graffiti DHCP
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Configuring Your Proxy Proxy Troubl
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Socks Stuff AOL Instant Messenger A
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Table of Contents Introduction: Get
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about your more complex network iss
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Tell Us What You Think! Table of Co
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with me when I was first getting st
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NIC (network interface card) The te
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MAC Attack Previous Table of Conten
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Routers Previous Table of Contents
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technology as the future of local a
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for a TCP/IP address in a large net
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Sprechen Sie DLC? Previous Table of
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socket 80 of the TCP/IP address 167
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program in a name entry; entering t
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WINS Previous Table of Contents Nex
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kind and spit them out as fast as p
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Previous Table of Contents Next Hou
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Figure 2.1 A simple logical map. If
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Figure 2.4 A physical documentation
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the room). This way, you can read t
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un on the server at 9:50 on Monday
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Previous Table of Contents Next Par
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Beware of Vendor Your vendor probab
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call the risk/benefit ratio—the a
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Workshop Q&A Previous Table of Cont
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If you determine that it’s just o
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(see Figure 4.2). Figure 4.2 An Eth
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Division of Labor Previous Table of
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just that the network itself is at
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A Each situation is obviously diffe
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Ruling out is particularly effectiv
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Drive duplication can be a big help
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Previous Table of Contents Next Aft
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5. When you log problems on a given
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if they have a plan, they are going
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Is It a Virus, Doc? Previous Table
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O: Only have tried two other Intern
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A Remember that what a user says is
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Previous Table of Contents Next Loo
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Figure 7.1 Searching several sites
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You’ll also find forums run by th
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Previous Table of Contents Next
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a server but you think it should be
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Workshop Q&A Previous Table of Cont
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Name Brand Versus Generic PCs The c
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static electricity that may have bu
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SIMMs and DIMMs There are two kinds
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This is called looping back, becaus
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Windows Previous Table of Contents
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Figure 8.4 The NT Task Manager’s
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UNIX Previous Table of Contents Nex
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Probably the most important thing t
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Hour 9 Ethernet Basics Previous Tab
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which translates into lots of colli
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it currently requires fiber-optic c
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designation is simply an industry-s
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Down, Down, Down Previous Table of
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A Collisions cause other errors, su
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Follow the Rules: Share and Enjoy!
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Previous Table of Contents Next Err
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Token Analyzers Finding a NAUN is r
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Token-Ring does not have any hard-a
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Down Town Previous Table of Content
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C. 1, 16 D. 4, 16 Answers to Quiz Q
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Going Native Although Windows allow
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Eminent Domain Previous Table of Co
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machine with the username Administr
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protocol. They therefore relied on
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Previous Table of Contents Next Fol
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Most of the time, you’ll not want
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allows you to manage them and check
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Binding Previous Table of Contents
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Figure 11.6 Showing bindings for al
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Informational Commands Previous Tab
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Figure 11.8 A monitor session. We k
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case you need them. 2. What does SM
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a great example of client/server. W
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Previous Table of Contents Next Alt
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The first number is the process ID
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tcp 0 0 frotz.frob.com.telnet 200.1
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Name Game Previous Table of Content
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The next thing you need to find out
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A UNIX security and file permission
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the amount of time used or data sen
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NLMs In addition to accepting comma
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NLM Party Previous Table of Content
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Again, make sure you are running th
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Big Monitor Is Watching Previous Ta
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Then, eureka! During one session of
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Protocol Problems Previous Table of
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Figure 13.10 UNICON will configure
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Summary Previous Table of Contents
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7. The TCP/IP protocol and basic se
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ivory-tower stuff, but some of it i
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Configuring in Comfort Previous Tab
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Router 1 in Figure 14.3 is shown in
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to that network. Instead, the next
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Route in Peace: Routing Protocols P
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get to a network segment that until
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Figure 14.4 How two stations talk v
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Tree Trunks Previous Table of Conte
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garbage characters like these on a
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A. Add Router 99 to Router 88’s r
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Let’s lay out some definitions he
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Packet-Filtering Routers Previous T
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eceptionist hangs up one line (the
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from the proxy server without causi
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Proxy Trouble Previous Table of Con
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3. The proxy server resolves the na
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Q My vendor says that its firewall
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• Make checklists of tasks that m
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Joe User Previous Table of Contents
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groups | grep -q -w network && { ec
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If you’re going to add or replace
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Policies Previous Table of Contents
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in this hour—will pay off as you
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Q Which duplication software is rig
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Hour 17 Where Do I Start? Previous
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As optimistic as we’d all like to
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• PCAnywhere • ReachOut • Rem
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IPX/SPX Previous Table of Contents
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Q What happens if I ping the loopba
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correlations? A. netstat -a B. trac
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equire that the application files t
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The File and Print Blues Previous T
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With five potential points of failu
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In some cases, a slight difference
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Application Celebration Previous Ta
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Proto Local Address Foreign Address
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printer 515 Line Printer Daemon (ne
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Connected to 167.195.160.6. Escape
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Workshop Q&A Q What in the blazes i
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3. A 4. B 5. False 6. B 7. True 8.
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Intranet = Internal The word intran
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Internet Identification Previous Ta
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If an outside machine is “on the
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Here I Ping Again Previous Table of
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Figure 19.6 DNS zones, like the fol
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[rs.internic.net] Registrant: John
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For example, I ran an NFS server on
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• SMTP—Simple Mail Transfer Pro
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Dialout DNS Previous Table of Conte
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3. What does DMZ stand for? A. DNS
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• It’s a way to avoid a Dilbert
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Socks Stuff Previous Table of Conte
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Figure 20.2 The AOL Instant Messeng
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RealPlayer Previous Table of Conten
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external client for proxy support,
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Typical Operation Previous Table of
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scantily, and still others are not
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Page 361 and 362: Q About that latency analysis metho
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Page 375: C. SYS:SYSTEM\AUTOEXEC.BAT D. SYS:P
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Page 393 and 394: An essential part of a network inte
Page 395 and 396: Index Symbols A 100 Megabit Etherne
Page 397 and 398: C new product, 45-46 burned-in addr
Page 399 and 400: DLC (Data Link Control), 17 DMZ (de
Page 401 and 402: F fat finger factor, 42-43, 46 fata
Page 403 and 404: ICQ, 335-336 IMAP (Internet Mail Ap
Page 405 and 406: M filters, 347-352 LANDecoder, 347
Page 407 and 408: NetBIOS (Network Basic Input/Output
Page 409 and 410: network card. See NIC Network Contr
Page 411 and 412: power supply check, 66 troubleshoot
Page 413 and 414: Q-R qualitative problems, 58 quanti
Page 415 and 416: names, 393-394 NetWare, 202 paging
Page 417 and 418: T dumb terminal mode, 211, 224 full
Page 419 and 420: isolating soft errors, 135-136 LANa
Page 421 and 422: U standardizing configuration, 245
Page 423 and 424: V W upstream, 134 Usenet newsgroups
Page 425 and 426: autodetection problems, 159 broadca
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