T1 and T3 leased lines, 53
TACACS+, 257-59, 265
attributes, 278-81
TCP (Transmission Control Protocol)
establishing connection, 64
segment format, 63-64
windowing, 65-66
TCP/IP (Transmission Control Protocol/Internet Protocol), 8, 13, 55-61, 91
vs. UDP as transport protocols, 57-59
messaging, 57
networks, 111
Telecom link, 12
Telnet, 38, 99, 102-3
TFTP (Trivial File Transfer Protocol), 132-34, 241
Thicknet, 189
Time-division multiplexing (TDM), 53, 383
Token domains, 194-95
Token passing, 194
Token Ring, 36, 42-44, 193, 194
Token-Card, 264
Topologies
in internetworking, 12-13
defined, 189
design factors, 193
global addresses to hide, using, 297
meshing, 586-88
network, 189-204
star, 42
star-hierarchy, 191, 192
view, 224-25
Total IP telephony, 383
Traffic flow, 592-94
Traffic load, 594-95
Traffic-based security, 246
Transmission Control Protocol (TCP), 294
Transport, 56
layer, 61-66
Trivial File Transfer Protocol (TFTP), 58
Troubleshooting, 618-61
Trunking, 425-26
Trunks, 48
WAN (wide area network), 17, 18, 52-54
Trusted network, 289
Tunneling, 327-29
Twisted-pair cabling, 197
specifications of, 200