W4 wed morning

AD DC
active directory

Virtualization

DNS (Domain name server)

dacp (dynamic address and stetic address)

VPN (virtual private network)



1. Wired network

Local area network (LAN), Wired
wide area network (WAN) - Router (through gateway) -switch - PC / Server / Printer

wpa2/psk

2. wireless network

Telstra - Wireless router - pc

2.4 ghz, 5 ghz

Recommend not to buy new software, wait until bugs are fixed



small enterprise forest

Mafia america
- mafia australia
 - mafia perth
 - mafia sydney
- mafia china
 - bejing
 - cloud



router 1 - (cat 6 cable) - switch
172.0.1.1/30

192.168.10.0/27
30 staff


router 2 - switch
172.0.1.2/30

192.168.12.0/26
50 staff


router 3 - switch
1

192.168.11.0/27
20 staff


192.168.10.0/24  - 110nnnnn.nnnnnnnn.nnnnnnnn.hhhhhhhh
can have 2^8 number of user,

192.168.10.0/25 - 110nnnnn.nnnnnnnn.nnnnnnnn.shhhhhhh
can have 2^ 7 number of user.

192.168.10.0/30 - 110nnnnn.nnnnnnnn.nnnnnnnn.sssssshh
can have 2^1 number of user

the few number of user we have, the better security we can get.