daily backup scheme, 304, 306
daisy-chaining hubs or switches, 96-98
Data Link Layer (OSI Model), 392-393
database servers, 71
databases
directory databases, 136
sharing, 58
dead computer, 281-282
dedicated servers, 14-15, 69
delegation for user accounts, 244
Delete permission, 254
Delete Subfolders and Files permission, 254
deleting
files, 375
user accounts, 247
Dell 725N storage appliance, 252
DHCP (Dynamic Host Configuration Protocol)
alternative to, 120
how it works, 120
IP addresses, 119-120
options, 120
reservations, 122-123
setting up, 120-123
DHCP clients, 126-127
DHCP servers
configuring DHCP server role, 154
lease duration, 124
network server, 120-121
reservations, 122-123
scopes, 121-122
Windows Server 2003 DHCP server, 124-126, 154
wireless access point (WAP), 183
diagrams, 72-73
differential backup scheme, 304, 307-308
digital certificates, 138
directories, 26
directory databases, 136
directory services, 135-137
disabling user accounts, 243, 246
disaster recovery plan, 301-302
disk space, 251, 280
disk striping, 269
disks (software disks), 390
distributions of Linux, 344
DNS (Domain Name System), 127-129
DNS clients, 131-132
DNS servers, 130-131, 154
documentation
back schedule, 230
computer equipment inventory, 230-231
network diagram, 230-231
passwords, 230, 389
system information, 68-69, 230
tracking log for network problems, 291-292
written documentation, 384-385, 389
dollar sign ($) character in hidden shares, 255
domain controller server, 154
domain name, 24, 127-130
Domain Name System (DNS), 127-129
domain networks, 24
domain user accounts, 238
domains, 127-129
dotted-decimal notation, 110-111
down (defined), 11
downloading service packs, 152
downtime, 377-378, 383
drive letters, 33
DSL Internet connection, 190
duct tape, 387
DVDs, 302
Dynamic Host Configuration Protocol (DHCP)
alternative to, 120
how it works, 120
IP addresses, 119-120
options, 120
reservations, 122-123
setting up, 120-123