0, 575 switchport mode trunk command, 46 TDM (time-division multiplexing), 353, 360 switchport multicast command, 326 telecom nomenclature, 341-353 switchport nonegotiate command, 41 telephony switchport port-security aging type command, common terms, 527-529 small office VoIP example, 538-541 switchport port-security command, 329 telephony-service command, 538 switchport port-security maximum command, telnet command, 506 Telnet packets, 575 switchport port-security violation command, Temporal Key Integrity Protocol (TKIP), 515 10Base-2 (thin-net), 5 switchport priority extend command, 336 10Base-5 (thick-net), 5 switchport trunk allowed command, 42 10Base-T, 5, 20 switchport trunk allowed vlan command, 43, 10 Gigabit Ethernet, 20 46, 80 terminal monitor command, 521, 567 switchport trunk pruning vlan command, 59 TFTP service switchport trunk pruning vlan except small office VoIP example, 537 command, 60 troubleshooting, 568 switchport unicast command, 326 thick-net (10Base-5), 5 switchport voice vlan command, 336 thin-net (10Base-2), 5 switchto command, 287, 488 three-tiered model switchto vdc command, 286 collapsed core, 639, 641 sync-peers command, 305 components, 639 synchronous optical network (SONET), 352, configuration concerns, 641-643 ecommerce websites, 644 system context, 480 typical depiction, 639 time, measuring, 689-690 time-division multiplexing (TDM), 353, 360 TKIP (Temporal Key Integrity Protocol), 515 T-Berd, 353 TOS (type of service) field, 578-581 T-carrier hierarchy, 346, 353 tr command (NX-OS), 278 traceroute tool, 173, 425 alarms, 363-366 traffic shaping configuring, 370-374 about, 582-585 encoding, 357-359 configuring, 604 framing, 359-361 Ethernet handoff scenario, 598-602 functionality, 355 Frame Relay speed mismatch, 602-606 performance monitoring, 362-363 transferring calls, 541 troubleshooting, 366-369 Index translation-profile command, 564 unattended transfers, 541 transparent mode (firewalls), 470, 493 undecillion, 673 trie, defined, 214 Unidirectional Link Detection (UDLD), 103 tri