I

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