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network technologies
lesson 5 understanding wireless networking
| Question | Answer |
|---|---|
| A ? is a device that is located between a wired LAN and a wireless client. | WAP |
| T/F A service set identifier (SSID) is a name that someone has assigned to a wireless network. | TRUE |
| T/F By disabling a SSID, a network administrator can improve the network's security. | FALSE |
| What media access control mechanism is used for wireless networks? | CSMA/CA |
| What wireless standard utilizes both the 2.4-gigahertz and 5-gigahertz frequencies? | 802.11n |
| What wireless transmission method hops between frequencies in a pseudorandom pattern? | FHSS |
| What wireless transmission method is used by IEEE 802.11b? | DSSS |
| What wireless transmission method splits the radio frequency signal into smaller subsignals? | OFDM |
| Which IEEE wireless standard was designed with a different frequency band to avoid interference in the crowded 2.4 gigahertz frequency band? | 802.11a |
| Which IEEE wireless standard increased the speed from 2 Mbps to 11 Mbps? | 802.11b |
| Which IEEE wireless standard uses OFDM? | 802.11g |
| Which IEEE wireless standard advertises speeds of up to 300 Mbps with the possibility of reaching 450 Mbps? | 802.11n |
| Which IEEE wireless standard is backward compatible with 802.11g? | 802.11n |
| The throughput of an IEEE 802.11ac wireless network is ? with the potential for as much as ? . | 500 Mbps / 1 Gbps |
| What is the weakest wireless security method? | WEP |
| What are the weaknesses of WEP? | a. Optional use b. Poor key management c. Weak encryption d. Widely available cracking software |
| t/f WPA2 requires hardware that is different from that used for WEP and WPA. | true |
| Which is used as part of the authentication process with IEEE 802.1x? | a. Authenticator b. Authentication server c. Supplicant |
| Which is not an advantage to using wireless networks in a business environment? | Data can travel much farther on a wireless signal as opposed to a wired network |
| t/f The Fresnel zone is the area above and below the direct line of sight between two points. | true |