Manning: Remote LAN Access

1	Introduction to Remote LAN Access	1
	Foreword	xi
	Preface	xiii
	The Transition to Local Area Networks	3
	Popular LANs	4
	Limited LANs	4
	Winds of Change	5
	Importance of Remote LAN Access	6
	Remote Access Applications	8
	Transparency of Access	9
2	Early Attempts at Remote Access	12
	Screen Sharing	12
	A Not-So-Bright Idea	14
	Dueling Monitors	15
	Remote Control Programs	16
	Terminal Servers	17
	Moving Up the Curve	19
3	The Beginning of Residential and Small Business Remote LAN Access	21
	Evolving to LANs	21
	Connectivity Categories	22
	Work-at-Home	24
	The Arrival of the Digital Superhighway	26
4	Connectivity Services	28
	Leased Services	29
	Switched Services	30
	Packet Services	33
	Cell-Switched Services	35
5	Technologies for Enterprise Network, LAN and Internet Connections	37
	Remote LAN Applications	37
	Plain-Old-Telephone-Service (POTS) and Analog Modems	38
	Remote Node vs. Remote Control	38
	Networking With Modems	40
	More on Modem Pools	42
	Analog Dial-Out	44
	The Analog Ceiling	45
	"The King is Dead. Long Live the King"	46
	Asymmetric Digital Subscriber Line	48
	High-Bit-Rate Digital Subscriber Line	50
	Symmetric Digital Subscriber Line	50
	Cable Modems	50
	Digital Simultaneous Voice and Data	53
	Frame Relay	54
	Integrated Services Digital Network	56
6	Service Comparisons	57
	Digital Service Cost Comparisons	57
	Leased and Switched Service Cost Analysis	58
	The ISDN Service Smorgasbord	61
	Service Comparison	62
	Equipment Cost Comparisons	62
7	The World of ISDN	66
	What ISDN Is and Is Not	66
	What ISDN Is Not	68
	ISDN Alphabet Soup	71
	The Future Implications of ISDN	77
8	ISDN Advantages and Disadvantages	79
	ISDN Advantages	79
	ISDN Disadvantages	81
	ISDN Complexities	83
	Physical Plant Limitations	83
	Configuring ISDN Hardware	85
	Testing ISDN Lines for Successful Installation	87
	Data Service Support	90
9	Ordering Integrated Services Digital Network	91
	My City Has It But Yours Doesn't	91
	The Hardest Part	92
	Device Certification	93
	Switch Translations	94
	ISDN Ordering Codes	95
	Auto Configuration	97
	Service Profile Identifier	98
	Automated SPID Selection	100
	Generic SPID Specification	100
10	Network Connections Using Terminal Adapters	102
	Terminal Adapter Features	103
	Accessing Networks with Terminal Adapters	104
	ISDN Modems	104
	Synchronous vs. Asynchronous Connections	106
	Rate Adaption	108
	Terminal Adapters and Terminal Servers	110
	X.25 Terminal Servers	110
	Communications Hubs	112
	Communications Servers	114
	PPP Over the D Channel	116
11	Connecting to the Internet	119
	It Takes Two to Tango	119
	Accessing the Internet Through On-Line Services	119
	Accessing the Internet Through Enterprise Networks	120
	Accessing the Internet Through Internet Service Providers	121
	Ordering ISDN Internet Connections	121
12	Call Control	125
	Manual Dialing	125
	Nailed-up Connections	126
	On-the-Fly Connections	128
	Call Set-up Time	128
	On-Demand Networking	129
	Dropping the On-Demand Call	130
	Building Enterprise Networks From WANs	131
	Virtual Network Connections	135
13	Making Remote LAN Access Connections	136
	Early Remote LAN Access Development	136
	Test Conclusions	138
	Related Early Work	139
	Communicating with Common Protocols	139
	Designing Successful WAN Solutions	141
	Remote Installation Support Policies	141
	ISDN Remote LAN Access Devices	144
	Terminal Adapters as Network Devices	144
	Bridges and Routers	145
	Deciding on Bridges or Routers	149
	ISDN PC Cards	150
	Network Drivers	151
	Personal LAN Devices	152
	The Enterprise Side	154
	Putting it All Together	155
14	Wide Area Networks	157
	Contention	157
	Whose Network am I Now, Anyway?	160
	Network Addressing Methods	160
	Packet Resequencing	164
	Protocols Chatting Across the Backyard Fence	167
	It's Not Nice to Fool Mother Nature	169
	WAN Integration into the OS and NOS	172
	ISDN Integration into Windows 95	173
	ISDN Integration into Novell NetWare	175
	D Channel Solutions for Protocol Management	176
15	Optimizing WAN Connections	178
	Ramming 10 Mbps Down a 128-kbps Pipe	178
	Contrasting LAN and WAN Bandwidth Requirements	179
	Bandwidth-on-Demand	180
	Bandwidth Management	180
	Dynamic Bandwidth Allocation	181
	Bandwidth Allocation Control Protocol (BACP)	182
	Multirate ISDN	183
	Compression	184
	Your Mileage may Vary	184
16	Network Filtering	187
	Protocol Filtering	187
	Address Filtering	190
	Custom Filtering	190
	Unicast, Multicast and Broadcast Filtering	191
	Filtering on the EDN Side	192
	Protocol Efficiency	192
17	Interoperability	194
	The ISDN Tower of Babel	194
	Provisioning	195
	The Big D: "Divestiture"	196
	Digital Nightmares	197
	Equipment Interoperability	199
	National ISDN	201
18	Extending ISDN to Your Doorstep	203
	Network Signaling	203
	Signaling System 7	205
	Clear Channel Capability	206
	The Last Mile	206
	ISDN Anywhere Programs	209
	Using Switched 56 to Extend ISDN	210
	The Copper Umbilical Cord	210
	ISDN Radio Connections	212
	Redundancy	213
	ISDN Radio Disadvantages	214
	Quality of Service	215
19	The Compleat Telecommuter	217
	A Few Words on Voice Capabilities	217
	Supplying Voice Services	219
	Intelligent B Channel Connections for Analog Services	222
	Home Equipment Issues	223
	Ringing Voltage	223
	Radio Frequency Interference	224
	FCC Device Certification	225
	Four ISDN Home Weaknesses	226
20	The View From the Deck of the Enterprise	229
	Network Management	229
	Billing Issues	231
	Providing Telecommuter Support	232
	Network Security	234
	Passwords	234
	Other Precautions	235
	Call Back	236
	Incoming Calling Line Identification (ICLID)	236
	Authentication	237
	Dynamic Password Authentication	240
	Which Security Method is Best	241
	One Final Thought	241
A	Remote LAN and ISDN Information Sources	243
	Glossary	248
	Index	259

Table of Contents