Wendell odom

crypto key command, 137
crypto key generate rsa command, 
137-139, 148
CSMA/CD (Carrier Sense Multiple 
Access with Collision Detection), 
55, 167
CUCM (Cisco Unified Communication 
Manager), 196
cycles, waves, 625
D
DAD (Duplicate Address Detection), 
598, 602
data
decryption, 655
encapsulation
OSI terminology, 30
TCP/IP terminology, 27-28
integrity, 656
privacy, 655
privacy/integrity methods, 660-661
data centers, 108
data link layer
Ethernet, 38-39, 49-50
TCP/IP, 25-26
data-link protocols, leased-line WAN, 
63-64
data paths, autonomous wireless 
networks, 635
data plane (cloud-based AP archi-
tectures), 637
Data VLAN (Virtual Local Area 
Networks), 197-199
DDN (Dotted-Decimal Notation), 24, 
305-309
de-encapsulating IP packets, 373-374
Dead Interval timers, 455
dead timers, troubleshooting, 512-513
debug command, 96
decimal masks. 
See 
DDN
9780135792735_book.indb 766
9780135792735_book.indb 766
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7/25/19 2:45 PM

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dynamic IP address configuration, DHCP 767
decimal subnet analysis, 331
difficult masks, 334-338
easy masks, 332
finding
subnet broadcast addresses, 
336-338
subnet IDs, 334-336
predictability in interesting octets, 
333-334
reference table: DDN mask values and 
binary equivalent, 338-339
decrypting data, 655
default gateways, 70, 370-372