2.3 Given a scenario, select and configure wireless devices and technologies. Flashcards
Explain channels with regards to networking.
What is channel width?
What are non-overlapping channels?
What is 802.11h?
2.4 GHz frequency option.
5GHz frequency option.
6GHz frequency option.
What is band steering?
What is an SSID?
- Service Set Identifier
- The name of the wireless network that you are connecting to.
What is a BSSID?
- Basic Service Set Identifier
- The hardware address of an access point.
- Example: 60:3D:26:11:22:33
What is an ESSID?
- Extended Service Set Identifier
- When you use the same SSID to extend the network to an access point.
What is a mesh network?
- A net work that has multiple access points to bridge any gaps
- Clients across an extended distance can communicate with each other.
What is an ad hoc network?
- A network that is created for a particular purpose without any previous planning (without an Access Point).
What is a point-to-point network?
- When you connect two access points together to extend a wired network over a distance
- Example: Building to Building, Site to site
What is an Infrastructure network?
- Clients communicate to an access point, the access point then forwards the traffic.
- Some access points allow clients to be able to communicate with each other.
What is WPA2 with regards to network encryption?
- Wi-Fi Protected Access 2
- Began in 2004
- Counter Mode with Cipher Block Chaining
- Data confidentiality with AES encryption
- Message Integrity Check (MIC)
What is WPA3 with regards to network encryption?
- Wi-Fi Protected Access 3
- Introduced in 2018
- GCMP: Galois/Counter Mode Protocol
- Data confidentiality with AES and Message Integrity Check (MIC).
What is PSK with regards to network authentication?
- Pre-Shared Key
- To gain access we need to provide users with a per-shared key
- Starbucks: PSK would be “hot coffee”
What is “enterprise” authentication?
- This authenticates users individually with an authentication server (i.e. RADIUS, LDAP, etc).
- 802.1X is the Standard
What is an omnidirectional antenna and how does it work?
- Signal is evenly distributed on all sides
- OMNI=All
- No ability to focus the signal
What is a directional antenna and how does it work?
- It allows you to focus the signal, send and receive in a single direction.
- Antenna performance is measured in dB.
- Example: Yagi Antenna, Parabolic Antenna
What is an autonomous access point?
- The access point doesn’t require any additional hardware or software to utilize.
What is a lightweight access point?
- Mostly used in an Enterprise setting.
- Separates the wireless functionality and intelligence of the configurations into the switch.
What is a Captive Portal?
- It is a pop-up that lets users know they need to authenticate to a network.
