Sair Linux and GNU Certification^® Level 1, Networking,

by Tobin Maginnis

• ISBN13: 9780471437536
• ISBN10: 0471437530
• Format: eBook
• Copyright: 2004-03-01
• Publisher: Wiley

Summary

From the Sair Linux and GNU certification team--indispensable study guides for becoming a Linux Certified Administrator (LCA) As the popularity of Linux and GNU enterprise solutions rises rapidly worldwide, IT professionals and network developers in corporations and government are increasingly expected to become Linux certified. This series of study guides from the company that developed the Linux and GNU Certification Program covers the complete knowledge base necessary to pass Level I of the certification exam, including networking, system administration, and security (a fourth volume on installation and configuration is now available). Each study guide covers the knowledge matrix that includes theory of operation, base system, shells and commands, system services, troubleshooting and security, as well as lab exercises and sample questions from the LCA exam. This book offers expert, hands-on guidance on the implementation and maintenance of Linux enterprise networks and how to keepthem working at maximum efficiency.

Table of Contents

Preface	ix
Acknowledgments	xi
Introduction	xiii
Part One Knowledge Matrix	1	(312)
Theory of Operation	3	(72)
Objectives	3	(1)
LANs and WANs	4	(5)
Intranets and the Internet	9	(2)
Communications Technology	11	(5)
IP Addresses	16	(2)
Hardware Addresses	18	(1)
Ethernet Technology	19	(2)
Internet Topologies	21	(3)
Congestion versus Flow Control	24	(5)
Physical to Logical Mapping	29	(5)
Internet Architecture	34	(3)
Network Protocols	37	(3)
Subnets	40	(3)
The Domain Name System	43	(5)
Logical or Loopback Devices	48	(2)
Manual Address Assignment	50	(4)
PPP versus SLIP	54	(2)
Virtual Hosting	56	(2)
Multicasting	58	(2)
UUCP	60	(2)
SMB and NMB	62	(1)
IPX/SPX	63	(2)
Internet Service Provider Services	65	(6)
Bandwidth and Buffer Size	71	(4)
Base Systems	75	(44)
Objectives	75	(1)
Topology	76	(2)
Network Interfaces	78	(4)
ARP Table	82	(2)
Routing Tables	84	(2)
Firewalls	86	(5)
Virtual Private Networking	91	(2)
Proxy Servers	93	(4)
IP Multicast	97	(2)
Network Block Devices	99	(2)
IP Aliasing	101	(2)
Portmapper	103	(2)
Hardware Devices	105	(5)
SYN Cookies	110	(1)
Sockets	111	(2)
Ports	113	(2)
Tunneling	115	(2)
Telephony	117	(2)
Shells and Commands	119	(96)
Objectives	119	(1)
arp	120	(3)
finger/fingerd	123	(2)
ipchains	125	(2)
ftpd	127	(2)
httpd	129	(6)
ifconfig	135	(1)
ifport	136	(2)
ifuser	138	(1)
inetd and tcpd	139	(2)
innd	141	(2)
Internet Packet eXchange	143	(2)
logd	145	(1)
lpd	146	(1)
mail	147	(7)
Network Information System	154	(4)
named	158	(1)
ncpmount	159	(3)
netstat	162	(2)
NFS	164	(1)
nslookup	165	(3)
ping	168	(2)
pppd/ipppd	170	(2)
pump, dhcpcd, and dhclient	172	(4)
Internet Routing	176	(3)
rsh, rlogin, and rexec	179	(2)
sendmail and smail	181	(4)
slattach	185	(1)
smbd and nmbd	186	(5)
ssh and openssh	191	(2)
talkd and talk	193	(2)
tcpdump	195	(1)
telnetd	196	(2)
timed	198	(1)
traceroute	199	(2)
uucp	201	(3)
uucp over TCP	204	(1)
Virtual E-Mail Account Configurations	205	(2)
whois	207	(2)
dip	209	(6)
System Utilities	215	(38)
Objectives	215	(1)
Telnet	216	(1)
Domain Name Server	217	(2)
File Transfer Protocol	219	(3)
Network File System	222	(5)
Internet Super Server	227	(3)
Samba	230	(2)
sendmail, smail, and qmail	232	(2)
POP3 and IMAP	234	(2)
News	236	(2)
Mail List Servers	238	(11)
Apache Server	249	(4)
Applications	253	(30)
Objectives	253	(1)
Mail and News Clients	253	(5)
Browsers	258	(4)
Samba	262	(4)
File Transfer Protocol	266	(5)
GUI Network Configuration Tools	271	(9)
Network Administration Tools	280	(1)
Other Networking Tools	281	(2)
Troubleshooting	283	(30)
I Just Installed a New NIC, But I Can't Go Anywhere!	283	(4)
I Try to Print, But I Can't Write to var/spool/lpd/lp	287	(2)
I Can Connect Using IP Addresses Only	289	(2)
Why Are Some Hosts on My Network Unreachable?	291	(2)
I Can Get Out, But I Lose 50 Percent of My Packets	293	(2)
I Can Connect, But I Can't Download Using FTP	295	(1)
Why Do I Get Intermittent Network Connections?	296	(1)
Why Is My Network Card Jabbering?	297	(2)
Why Are Some of My Records Missing from DNS?	299	(2)
The Error relaying denied Is Returned; Why?	301	(1)
Why Is My 100Mb Half-Duplex Mode?	302	(1)
New Users Cannot Log in Using the DNS Server	303	(2)
My 100Mb Card Gets Only 60 Percent Bandwidth; Why?	305	(1)
Why Can a Server Not See New E-Mail Aliases?	306	(2)
Why Does sendmail Hang at Boot Time?	308	(1)
I Can't See Files in My Root Home Directory	309	(1)
Why Does DNS Direct Me to a Nonexistent Host?	310	(3)
Part Two Labs and Exercises	313	(104)
Configure a Network Card Using ifconfig	315	(8)
Purpose	315	(1)
Theory	315	(4)
Lab Exercises	319	(1)
Questions	320	(1)
Answers	320	(1)
Advanced Questions	321	(2)
Configuring PPP Scripts	323	(6)
Purpose	323	(1)
Theory	323	(3)
Lab Exercises	326	(1)
Questions	326	(1)
Answers	326	(1)
Advanced Questions	327	(2)
Configure Samba to Share a Printer and Directory	329	(6)
Purpose	329	(1)
Theory	329	(3)
Lab Exercises	332	(1)
Questions	332	(1)
Answers	332	(1)
Advanced Questions	333	(2)
Mounting a Remote File System Manually and with /etc/fstab	335	(4)
Purpose	335	(1)
Theory	335	(2)
Lab Exercises	337	(1)
Questions	338	(1)
Answers	338	(1)
Advanced Questions	338	(1)
Using ftp	339	(4)
Purpose	339	(1)
Theory	339	(2)
Lab Exercises	341	(1)
Questions	342	(1)
Answers	342	(1)
Advanced Questions	342	(1)
Running X Window Applications on Remote Systems	343	(4)
Purpose	343	(1)
Theory	343	(1)
Lab Exercises	344	(1)
Questions	345	(1)
Answers	345	(1)
Advanced Questions	345	(2)
Port Forwarding Using ssh	347	(4)
Purpose	347	(1)
Theory	347	(1)
Lab Exercises	348	(1)
Questions	348	(1)
Answers	349	(1)
Advanced Questions	349	(2)
Apache	351	(4)
Purpose	351	(1)
Theory	351	(2)
Procedure	353	(1)
Questions	354	(1)
Answers	354	(1)
Advanced Questions	354	(1)
Use X-Win32 to Start the X Window System	355	(4)
Purpose	355	(1)
Theory	355	(1)
Lab Exercises	356	(1)
Procedure	356	(1)
Questions	357	(1)
Answers	357	(1)
Advanced Questions	358	(1)
IP Masquerading	359	(4)
Purpose	359	(1)
Theory	359	(1)
Lab Exercises	360	(2)
Questions	362	(1)
Answers	362	(1)
Advanced Questions	362	(1)
Add a Port Label to /etc/services and Add a Service to inetd	363	(4)
Purpose	363	(1)
Theory	363	(2)
Questions	365	(1)
Answers	365	(1)
Advanced Questions	365	(2)
Manually Add an Address to the APP Table	367	(4)
Purpose	367	(1)
Theory	367	(2)
Lab Exercises	369	(1)
Questions	369	(1)
Answers	370	(1)
Advanced Questions	370	(1)
Set Up and Test netperf and wire-test	371	(6)
Purpose	371	(1)
Theory	371	(3)
Lab Exercises	374	(1)
Questions	374	(1)
Answers	374	(1)
Advanced Questions	375	(2)
Modify sendmail Configuration to Limit Incoming and Outgoing Mail to 10MB	377	(6)
Purpose	377	(1)
Theory	377	(3)
Lab Exercises	380	(1)
Questions	381	(1)
Answers	381	(1)
Advanced Questions	381	(2)
Using tar to Archive a Remote File or Directory Structure	383	(4)
Purpose	383	(1)
Theory	383	(1)
Tarring Files Located on a Remote Machine	384	(1)
Tarring Files on a Local Machine to a Remote File or Device	384	(1)
Questions	385	(1)
Answers	385	(1)
Advanced Questions	385	(2)
Adding PPP and Setting-Up a Shotgun PPP Connection	387	(6)
Purpose	387	(1)
Theory	387	(3)
Lab Exercises	390	(1)
Questions	391	(1)
Answers	391	(1)
Advanced Questions	391	(2)
Setting Up a Bonded Ethernet Device	393	(6)
Purpose	393	(1)
Theory	393	(4)
Lab Exercises	397	(1)
Questions	397	(1)
Answers	397	(1)
Advanced Questions	398	(1)
Compiling and Configuring Majordomo	399	(4)
Purpose	399	(1)
Theory	399	(1)
Getting Started	400	(1)
Lab Exercises	400	(2)
Questions	402	(1)
Answers	402	(1)
Setting Up a DHCP Server	403	(4)
Purpose	403	(1)
Theory	403	(1)
Lab Exercises	404	(1)
Questions	404	(1)
Answers	405	(1)
Advanced Questions	405	(2)
Setting Up a Serial Network Using SLIP	407	(4)
Purpose	407	(1)
Theory	407	(2)
Lab Exercises	409	(1)
Questions	409	(1)
Answers	410	(1)
Advanced Questions	410	(1)
Checking Out a File Using CVS	411	(6)
Purpose	411	(1)
Theory	411	(3)
Lab Exercises	414	(1)
Questions	415	(1)
Answers	415	(1)
Advanced Questions	415	(2)
Part Three Questions and Answers	417	(30)
Practice Questions	419	(22)
Answers	441	(6)
Glossary	447	(20)
Index	467