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E channel, 541
E-Commerce module, 199
security risks, 489
e-mail gateways, Application layer for, 18
E.164, 541
E1, 541
ECNM (Enterprise Composite Network Modules), 488, 541
edge device, 541
Edge Distribution module, 199
EDI (electronic data interchange), Application layer for, 18
EFCI (explicit forward congestion indication), 541
EIA/TIA-232-C, 236
EIGRP (Enhanced Interior Gateway Routing Protocol), 313, 317, 325, 333–344
in case study, 515
configuration, 341–344
for AppleTalk, 344
for IP, 341–342
for IPX, 342–343
features and operation, 333–339
neighbor relationships, 334–335
route calculation and updates, 335–339, 336, 340
route tagging, 334
turning off auto-summarization for, 279
EIP (Ethernet interface processor), 541
ELAN (emulated LAN), 542
ELAP (EtherTalk Link Access Protocol), 542
elastic traffic, 420
electronic data interchange (EDI), Application layer for, 18
emulated LAN (ELAN), 542
encapsulation of data, 36–37, 37, 542
at Data Link layer, 33–34
encryption, 542
end nodes
cable type, connector type and maximum distance, 105
with repeaters, maximum distancefor, 106
Enhanced Interior Gateway Routing Protocol (EIGRP), 313, 317, 325, 333–344, 542
turning off auto-summarization for, 279
Enterprise Composite Network Model (ECNM), 197–200, 541
Enterprise Campus modules,198–199, 542
Enterprise Edge modules, 199, 542
Service Provider Edge modules, 200
enterprise network, 542
EPROM (Erasable Programmable Read-Only Memory), 542
ESF (Extended Superframe), 543
Ethernet, 38–40, 543
100BaseT Fast, 103–106
advantages, 104
specifications, 104–106
bridge vs. repeater for, 7
bridging between Token Ring and, 392
full-duplex mode, 69, 101–103
design, 102–103, 103
half-duplex mode for, 102, 102
Ethernet switches, 382
EtherTalk, 543
EtherTalk Link Access Protocol (ELAP), 542
Events group in RMON, 440
exceeding TTL, 320
excess rate, 543
Exchange Protocol, 363
executive summary, in design document,459–460
expansion, 543
expedited delivery, 543
explicit forward congestion indication(EFCI), 541
explorer packets, 391, 543
Extended Superframe (ESF), 543
exterior routes, in IGRP, 329
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