Zusammenfassung der Ressource
u8.1 Wireless LAN
- Advantages
- Unrestricted by wired
network connections
- Practical benefit of being free to roam,
not tied to any specific location to
access a pc IE doctors, manufacturing
- Increased flexibility, offered
in places where wired cant
- Allows reorganisation of shops/offices
without having to think of cabling
- Business benefit of offering it to
customers, coffee shops, airports etc
- Vulnerabilities
- Anyone can transmit
- no legal control of Wireless
networking frequencies
- Anyone can transmit on any
signal jamming the freqency
- This leads to denial of service
- Threat of masquerading
- Attacker can pretend to be a legitimate
signal and get you to connect
- Wireless sometimes shared
with other technologies
- Possibility that users of those
technologies causing an DOS
- Anyone can receive wifi signals
- Cant limit the distance of a radio signal travels
or confine it to a floor or specific building
- Therefore difficult to limit the population
who could receive a wifi signal
- Components
- Station - Desktop,
laptop, phone, pda etc
- Has wireless NIC
- Access point
- bridge between wireless and wired NW
- Standards
- 802.11
- 1,2 MBPS
- 802.11b
- 5.5 & 11 MBPS
- 802.11a
- up to 54 MBPS
- 802.11g
- up to 54 MBPS
- 802.11n
- up to 150 MBPS