w5 wed morning

subnet mask
11111111.11111111.11111100.00000000 1024 - 2 = 1022
11111111.11111111.11111110.00000000 512 - 2 = 510

11111111.11111111.11111111.00000000 256 - 2 = 254
11111111.11111111.11111111.10000000 128 - 2 = 126
11111111.11111111.11111111.11000000 64 - 2 = 62


less user means more secure

Server
ADDC active directory domain contoler
DNS 192.168.32.1/24
192.168.32 (Forwarder)
32.168.192 (Reverser)

DHCP Dynamic host control protocol
File Server

creating user/ group/ organizational unit
folders to read/ write/ full control

cisco hardware/ certificate

WAN - Router ISP (gateway) - switch - wireless router - WLAN - internet access


WLAN Radiowaves

Difference between WLAN, LAN
WLAN ueses CSMA/ CA (Carrier sense multiple access/ collision avoidance)

Protocol is RTS (Ready to send)

MODEM - modulate and demodulate
- code and decode, digital to frequency, frequency to digital

Wireless antennas

Omnidirectional
- Most ap use this technolocy

direction
- placed on ceiling stronger


Distance degradation
1. distance
2. walls
3. interference from other wireless devices
- optical fiber cable through elevator to connect another floor

SSID (Service set identifier)
- must be the same to connect

Channels
- Safe for interference
- do not overlap channels

Security
- SSID (Open access)
- Mac address filtering
- wep wired equivalent privacy
- wap wifi protected access
- wpa2-psk enterprise
- aes-advanced encryption standard

configuring
- the wap





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