YOMEDIA
Lecture Basic network management: Chapter 16 - Trung tâm Athena
Chia sẻ: Tùy Duyên
| Ngày:
| Loại File: PPT
| Số trang:30
47
lượt xem
3
download
Download
Vui lòng tải xuống để xem tài liệu đầy đủ
Lecture Basic network management: Chapter 16 - Wireless LAN. Chương này cung cấp các khái niệm về wireless; các mode sử dụng trong hệ thống mạng Wireless LAN; thế nào là ad-hoc mode? Infrastructure mode?; Các tiêu chuẩn IEEE 802.11a, 802.11b, 802.11g.
AMBIENT/
Chủ đề:
Nội dung Text: Lecture Basic network management: Chapter 16 - Trung tâm Athena
- Chapter 16: Wireless LAN
ATHENA
- Objective
What is Wireless LAN?
What is infrastructure Mode?
What is adhoc mode?
IEEE 802.11a,802.11b,802.11g
ATHENA
- WireLess Lan
Wireless Lan connect the
computers and network
communication devices within
geographically limited areas.
WireLess Lan use frequency band
2,4Ghz
ATHENA
- Wireless Lan
WireLess Lan does not require:
• Liningup
• Line of sight
ATHENA
- Wireless Lan
WireLess Lan has many advantages in
connecting the devices together in your
office.
• Fast deployment.
• Easy installation,easy and convenient to
operate.
• Easy upgarde and maintenance.
• Network access everywhere,everytime.
ATHENA
- Wireless Lan
IEEE 802.11 : Defined network standards for
physical components of wireless Lan
IEEE 802.11 : built in 1997
ATHENA
- Wireless Lan
IEEE 802.11 has two modes:
• Infrastructure mode
• Adhoc mode
ATHENA
- Wireless Lan
Infrastructure mode:
• Wireless Lan use Accesspoint
• And computers with wireless Card are
connected together through Access Point
ATHENA
- Wireless Lan
Adhoc mode:
• Devices which can connect
together directly
• Without Access point
ATHENA
- Wireless Lan
IEEE 802.11b :
•Wireless Lan
–Speed: 1Mbps – 11Mbps
–Frequency Band : 2,4 Ghz
ISM Band(Insdustrial
Scientific Medical Band)
ATHENA
- Wireless Lan
IEEE 802.11b Plus (IEEE 802.11b +)
• Improved from IEEE 802.11 b
• Frequence band : 2,4Ghz DSSS
• Speed :22 Mbps
ATHENA
- Wireless Lan
IEEE 802.11 a:
• Wireless Lan.
– Speed : 6Mbps – 54 Mbps
– Frequence band : 5Ghz or more
ATHENA
- Wireless Lan
IEEE 802.11a is :
• Not compatible with 802.11b and 802.11b
Plus
ATHENA
- Wireless Lan
IEEE 802.11g is :
Wireless Lan
– Speed : 1Mbps – 54 Mbps
– Compatible with 802.11b and 802.11a
ATHENA
- Wireless Lan
Wireless :
• IEEE 802.11a,IEEE 802.11b, IEEE 802.11b
plus, IEEE 802.11 g use Access method
CSMA/CD(Carrier Sense Multiple
Access/Collision Detection)
ATHENA
- Wireless Lan
Components of Wireless
• Wireless Access Point
• Wireless LAN PCI Card
• Wireless LAN PCMCIA Card/Carbus
• Wireless Print Server
ATHENA
- Wireless Lan
Wireless Access Point
• Similar Hub/Switch in Wireline
• Connect clients use frequence band : 2,4Ghz
2,4835Ghz
• Distance from access point to wireless client:
depend on environment , devices, standard of
network( IEEE 802.11a, IEEE 802.11b ….)
ATHENA
- Wireless LAN
Wireless Access Point
ATHENA
- Wireless Lan
Wireless LAN PCI Card
• Net card for destop computer
• PCI
• Operate on many channels
ATHENA
- Wireless Lan
Wireless LAN PCI card
ATHENA
Thêm tài liệu vào bộ sưu tập có sẵn:
Báo xấu
LAVA
ERROR:connection to 10.20.1.100:9315 failed (errno=111, msg=Connection refused)
ERROR:connection to 10.20.1.100:9315 failed (errno=111, msg=Connection refused)
Đang xử lý...
Thêm vào BST
Báo xấu
