31 Days Before Your CCNA Exam

update packets, EIGRP 397TCP/IP models, 13-16TCP/IP protocols, 15-16TCP/IP stacks, testing on Windows PC, 63Telecommunications Industry Association(TIA), 36Telnet, 15, 176telnet command, 11Temporal Key Integrity Protocol(TKIP), 264Teredo tunneling, IPv6, 143termination, TCP/IP, 25testingconnectivityto default gateways on Windows PC, 63to destinations on Windows PC, 64TCP/IP stacks on Windows PC, 63TFTP servers, recovering IOS images,186-187tftpdnld command, 187threat control, 274threatsto networks, 271-272to physical infrastructures, 271vulnerabilities, 270TIA (Telecommunications IndustryAssociation), 36TKIP (Temporal Key IntegrityProtocol), 264tools for troubleshooting, CDP, 68-69top-level domains, 126topologies, 8, 339traceroute, 133-134, 175, 246tracert, 132-134tracing routes from Windows PC, 65traffic types, VLANs, 72transitioning to IPv6, 142-143Transmission Control Protocol (TCP), 15transport layer (TCP/IP), 21-22connection establishment andtermination, 25error recovery, 24flow control, 25port numbers, 23TCP header, 22UDP, 26Triple DES (3DES), 323Trojan horses, 272troubleshootingACLs, 291denied protocols, 292-293host has no connectivity, 291-292Telnet is allowed #1, 293Telnet is allowed #2, 294Telnet is allowed #3, 294-295EIGRP, 248inter-VLAN routing, 105with layers, 29methodology, 61-62NAT, 304-305neighbor adjacency issues, 248-250OSPF, 239-240, 248RIP, 247-248RIPv2, 208-209routing, 245STP, 84tools, CDP, 68-69trunking, 93-94VLAN, 93-94VLSM, 246VTP, 102-103WAN implementations, 349Layer 1 problems, 350Layer 2 problems, 350-351Layer 3 problems, 351-352WLAN, 264trunkingconfiguring, 91-93troubleshooting, 93-94verifying, 91-93trunking VLANs, 74-75trust exploitation, 272tunneling, 322. See also encapsulationIPv6, 143Teredo tunneling, IPv6, 143VPNs, 323UUDP (User Datagram Protocol), 15TCP/IP, 26undebug all, 248unshielded twisted-pair (UTP), 164unstructured threats, 271up interfaces, layer 1 problems, 67update packets, EIGRP, 213