ZyXEL Communications P-661HNU-Fx Support Notes page 3

6. Does the VC-based multiplexing perform better than the
LLC-based multiplexing? ....................................................................... 15
7. How do I know the details of my ADSL line statistics? ................. 15
8. What are the signaling pins of the ADSL connector? .................... 15
9. What is triple play? ............................................................................. 15
Firewall FAQ ................................................................................................ 17
General...................................................................................................... 17
1. What is a network firewall? .................................................... 17
2. What makes P-661HNU-Fx secure? ..................................... 17
3. What are the basic types of firewalls? ................................... 17
4. What kind of firewall is the P-661HNU-Fx? ........................... 18
5. Why do you need a firewall when your router has NAT built-in?
..................................................................................................... 18
6. What is Denials of Service (DoS) attack?.............................. 18
7. What is Ping of Death attack? ................................................ 19
8. What is Teardrop attack? ....................................................... 19
9. What is SYN Flood attack? .................................................... 19
10. What is LAND attack? .......................................................... 19
11 What is Brute-force attack? ................................................... 19
12. What is IP Spoofing attack? ................................................. 20
13. What are the default firewall rules in P-661HNU-Fx? ......... 20
Configuration ........................................................................................... 20
1. How do I configure the firewall? ............................................. 20
2. How do I prevent others from configuring my firewall? ......... 20
3. Why can't I configure my P-661HNU-Fx using Web
Configurator/Telnet over WAN? ................................................. 21
4. Why can't I upload the firmware and configuration file using
FTP over WAN?.......................................................................... 22
Wireless FAQ ............................................................................................... 23
General FAQ ............................................................................................. 23
1. What is a Wireless LAN? ..................................................... 23
2. What are the advantages of Wireless LAN? ..................... 23
3. What is the disadvantage of Wireless LAN? .................... 23
4. Where can you find 802.11 wireless networks? ............... 24
5. What is an Access Point? ................................................... 24
6. Is it possible to use wireless products from a variety of
vendors? .................................................................................... 24
7. What is Wi-Fi? ....................................................................... 24
8. What types of devices use the 2.4GHz Band? ................. 24
9. Does the 802.11 interfere with Bluetooth device? ........... 25
10. Can radio signals pass through wall? ............................. 25
11. What are potential factors that may causes interference
among WLAN products? ......................................................... 25
12. What's the difference between a WLAN and a WWAN? 26
All contents copyright © 2010 ZyXEL Communications Corporation.
P-661HNU Series Support Notes
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