Wireless and Network Interview Questions and Answers

Q1. What is Wi-Fi?

Wi-Fi is a technology that uses radio waves to provide network connectivity. A wi-fi connection is established using a wireless adapter to create hotspots - areas in the vicinity of a wireless router that are connected to the network and allow users to access internet services. Once configured, wifi provides wireless connectivity to your devices by emitting frequencies between 2.4 GHz - 5 GHz, based on the amount of data on the network.

Q2. What is a Wi-Fi hotspot?

A hotspot is a physical location where people may obtain internet access, typically using wi-fi technology, via a wireless local area network (Wlan) using a router connected to an internet service provider.

Q3. What are IBSS and BSS?

Independent Basic Service Set (IBSS) allows two or more devices to communicate directly with each other without a need for a central device.

Basic Service Set (BSS) wireless LAN is established using a central device called an Access Point that centralizes access and control over a group of wireless devices.

Q4. Why WPA encryption is preferred over WEP?

A)     Encryption is preferred over WEP.

B)      The access point and the client are manually configured with different WPA key values.

C)      Wep Key values remain the same until the client configuration is changed.

D)     The values of WPA keys can change dynamically while the system is used.

Q5. What is 802.1x and EAP?

IEEE 802.1x is an IEEE standard for port-based network access control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or Wlan.

Q6. Name two devices can interfere with the operation of a wireless network because they operate on similar frequencies?

1.       Microwave oven

2.       Cordless phone

Q7. What are three basic parameters to configure on a wireless access point?

1.       SSID

2.       RF

3.       Channel authentication method

Q8. What is the maximum data rate specified for IEEE 802.11b wlan?

11 mbps

Q9. Which encryption type does wpa2 uses?

WPA uses Tkip and wpa2 uses AES, but in summary Tkip is an older encryption standard used by the old WPA standard. AES is a newer wi-fi encryption solution used by the new-and-secure wpa2 standard. In theory, that's the end of it 317 and 802.1b is being utilized in the wireless network.

Q10. How does DHCP work with the Wireless?

The wireless is designed to act as a dhcp relay agent to the external dhcp server and acts like a dhcp server to the client. This is the sequence of events that occurs: Generally, wlan is tied to an interface which is configured with a dhcp server. When the wireless receives a dhcp request from the client on a wlan, it relays the Request to the dhcp server with its management ip address. The wireless shows its virtual ip address, which must be a non−routable address, usually configured as 192.168.0.1, as the dhcp server to the client.

Q11. Which two wireless encryption method are based on RC4 encryption algorithm?

1.       Wep

2.       Tkip

Q12. What is the function of wlan on wireless?

Wlan is similar to that of ssid in the access point. It is required for a client to associate with its wireless network.