iFCP, 416
Integrated Services Digital Network. See ISDN
Intelligent network services, 446
Interface modules, 116
International Organization for Standardization (ISO), 34
Internet
as layer, 56
Cisco and, 3-27
defined, 8
private, 71
routers and, 93-95
technologies, 8
Internet Assigned Numbers Authority (IANA), 61, 67, 449
Internet backbone providers (IBP), 14
Internet Control Protocol (ICMP), 294
Internet Engineering Task Force (IETF), 15
Internet Protocol. See IP
Internetwork Operating System (IOS), 20
Internetworking, 4-6
basic topologies, 12-13
defined, 4, 8
design basics, 572-88
designed to fit needs, 588-95
designing switched, 289-13
firewalls as security in, 296-97
major device types, 8-11
overview, 4-6
players in, 13-14
protocols, 14-16
three-layer hierarchical design model, 578-83
trends in, 17-19
Interoperability, 34
Intranet, 8
IOS, 6, 33, 103, 127-34
12.4, 143-47
authentication methods in, 268
authorization types, 273
command completion, 153
command syntax, 152-53
commands, using, 148-54
communicating with, 142
configuration modes, 154-55
configuring firewall, 305-9
feature sets, 26, 127-32
Firewall feature set, 301-2
firewall functions, 304
navigation commands, 159
XR, 148-48
IP
address, 66-67, 76, 77
address classes, 69-71
address format, 68
datagram, 57
datagram, format, 59-60
IP Version 6, 79-84
management, 230-31
multicasting, 446-49
prefix, 81
services, 146
switching, 213
telephones, 387
telephony, 19, 403-4
videoconferencing solution, 467-70
IP-enabled PBX, 383
iSCSI (Small Computer System Interface), 415
ISDN, 581, 614
ISP (Internet Service Provider), 13, 244, 291
connectivity, 26