Network class - May 19th [Community Learning Week • Phase 2] Activity

【Answer】1.ACD   2.C     3.D    4.ABCD     5.ABCD

【Winner】thibay,  Malik3000,  DragonVN,  DKetrari,  hugu

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Hello, everyone!
Join the Community Learning week Network Routing&Switching Basic WLAN topic! 

Network class learning time of this phase: May 17th - May 22nd.
Answer time of this class: May 19th, 2 AM - May 20th, 10 AM (UTC+0)
Class topic

Post 1. WLAN Radio Frequencies
Like wireless broadcasting, wireless television, and mobile communications, WLANs also use radio frequencies to carry information. Specifically, WLANs use the 2.4 GHz band (2.4 GHz to 2.4835 GHz) and 5 GHz band (5.150 GHz to 5.350 GHz and 5.725 GHz to 5.850 GHz), which are parts of the ultra-high frequency (UHF) band and super-high frequency (SHF) band, respectively ... More

Post 2. WLAN Standards
WLAN is usually defined as a wireless LAN built on the IEEE 802.11 standards. Since 802.11 always appears on WLAN products, you may be no stranger to it, so we won't list the basic concepts here. The remainder of this post will instead describe five landmark 802.11 standards: 802.11a, 802.11b, 802.11g, 802.11n, and 802.11ac ... More

Post 3. STA access
Regardless of whether an AP is a Fat AP or an online Fit AP, the AP is deployed to provide a wireless coverage environment for STA access. This enables us to use STAs to connect to a WLAN through APs within the WLAN coverage area ... More

Post 4. WLAN security policy
Nowadays, wireless networks are provided almost everywhere. In most cases, however, you cannot access the Internet without authentication even if you have scanned wireless networks. In the wireless network list on a mobile phone, Secured with WPA2 or Secured with 802.1x is displayed under a service set identifier (SSID) ... More

Post 5. WLAN access authentication
According to the Internet access regulations for Internet connections, terminals must be successfully authenticated before accessing the Internet. Considering the complexity of mobile terminals, installing authentication clients on all terminals for identity authentication is impossible ... More

Class Questions

After attending this class, please answer the following questions and comment with the answers below this post.
1. (Multiple-Choices Question)Among the 13 channels in the 2.4 GHz band, which 3 channels do not overlap?
A. 1
B. 5
C. 6
D.11

2. What is the physical layer technology used by the 802.11ac protocol?
A. FHSS/DSSS
B. DSSS/OFDM
C. OFDM/MIMO
D. DSSS/MIMO

3. What is(are) the step(s) involved in STA access?
A. Scanning
B. Link authentication
C. Association
D.Above all

4. (Multiple-Choices Question)What WLAN security policies are available?
A. WEP
B. WPA
C. WPA2
D. WAPI

5. (Multiple-Choices Question)What are the basic elements of the typical networking of the Portal authentication system?
A. Authentication Client
B. Access Device
C. Portal Server
D. AAA Server
Hope you get good grades, come and enjoy this learning party! 


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