E

EAP (Extensible Authentication Protocol), 85,

272, 275-276 EAP-TLS (Extensible Authentication Protocol Transport Layer Security), 272, 275-276 eBGP (external BGP), 74 EIGRP (Enhanced Interior Gateway Routing

Protocol), 57-61 election process (DRs), disabling, 70 e-mail attacks, 420 SMTP, 128-129 enable passwords, setting, 188 enabling, 428-429 HSRP, 43

Nagle algorithm, 426 PortFast on Cisco switches, 25 SSH support on Cisco routers, 136-138 encapsulation, 19 HDLC, 76 LCP, 78 PPP, 77

encryption technologies, 246-247

3DES, 250 AES, 250-251 DES, 248-250 Diffie-Hellman, 252-253 IPSec, 254

AH, 257-258 ESP, 255-256 MD5, 251-252 principles of, 247-248

error messages, synchronous logging, 178 establishing Telnet connections, 187 Ethernet

CSMA/CD, 20 intefaces, states of, 173 media specification, 21, 92 spanning tree, 23

exam

FAQs, 633 objectives, 627 preparing for, 631 study tips, 625-626 extended access lists, 196-198 external links, 63

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