background image
814
internal logic, 150
IOS CLI versus router IOS CLI, 187
IOS information, displaying, 186
ISDN
configuration, 587
defining to router, 579
logic behind, 148
MAC address tables
configuration, 182­185
displaying contents, 182­185
sample output, 183
neighboring devices, learning about via CDP,
45­47
port security, 183­185
ports
address violations, 185
assigning to VLANs, 188
duplex settings, verifying, 181­182
full-duplex, 180­182
half-duplex, 180­182
IP configuration, verifying, 181­182
MAC addresses, limiting associations
with, 183­185
numbering, 179
security, setting, 178
VLAN membership, displaying, 188
Spanning Tree configuration status, displaying,
193­194
store-and-forward processing, 152­153, 203
system files, managing, 186­187
Telnet connections, 289­292
version information, displaying, 186­187
versus bridges and routers, 157­158, 203­204
VTP configuration information, displaying, 199
SYN field (TCP connection establishment), 223
Synchronous Data Link Control (SDLC), 522, 598
synchronous serial leased lines (WANs), 520, 590,
597
clock source, 521, 597
compression, 526­528
encapsulation, changing, 524
framing, 520
HDLC, 522, 591, 602
LAPB, 522, 591, 602
PPP, 522, 591, 601
syncronous serial interfaces (routers), 528
syslog (IOS), 32­34
syslog messages, flow, 57
system files (switches), managing, 186­187
T
T ISDN reference point, 572
T/1 lines, 521, 598
T/1 mux, 521, 598
TA (Terminal adapter) ISDN function group, 572
TCP (Transmission Control Protocol), 217, 697
connection-oriented nature of, 87
connections
establishing, 222­224, 320
termination, 222­224
data transfer, ordered, 218
error recovery, 89, 91, 114, 220­221, 320, 674
features of, 217
flow control, 221­222
forward acknowledgment, 220
functions of, 224
headers, 217­218, 225
multiplexing, 218­220
sockets, 218­220
versus UDP, 224­226, 317
TCP header compression
Frame Relay frames, 551
TCP/IP (Transport Control Protocol/Internet
Protocol), 211
ARP, 226­227
FTP, 232­234
control connections, 320
versus TFTP, 234, 318
ICMP, 227
Address Mask Request/Reply message,
228
Code field, 228
Destination Unreachable message,
227­230, 317
Echo message, 228, 232
Parameter Problem message, 228
Redirect message, 228, 231
Router Advertisment and Selection
message, 228
Source Quench message, 227
switches
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