March 2011
Intermediate to advanced
450 pages
18h 25m
English
Content preview from From GSM to LTE: An Introduction to Mobile Networks and Mobile BroadbandBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
6.10 Questions
1. What are the differences between the ‘ad hoc’ and ‘BSS’ modes of a WLAN?
2. Which additional functionalities can often be found in WLAN access points?
3. What is an extended service set (ESS)?
4. What is an SSID and in which frames is it used?
5. What kinds of power-saving mechanisms exist in the WLAN standard?
6. Why are acknowledgment frames used in a WLAN?
7. Why do 802.11g networks use the RTS/CTS mechanism?
8. Why are three MAC addresses required in BSS frames?
9. How can a receiving device detect the speed at which the payload part of a frame was sent?
10. What is the maximum transfer rate that can be reached in a data transfer between two 802.11g devices in a BSS?
11. What disadvantages does the DCF method have for telephony and video streaming applications?
12. Which security holes exist in the wired equivalent privacy (WEP) procedures and how are they solved by WPA and WPA2 (802.1x)?
Answers to these questions can be found on the companion website for this book at http://www.wirelessmoves.com.
References
[1] IEEE, ‘Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications’, ANSI/IEEE Std 802.11, 1999 Edition (R2003).
[2] IEEE, ‘Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications’, ANSI/IEEE Std 802.3, March 2002 Edition.
[3] IEEE, ‘Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-Speed Physical Layer Extensions ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.