Wireless CCNA review

Front

What is recommended for the wireless infrastructure design of an organization? Options: Group access points (APs) together to increase throughput on a given channel, Configure the 1st 3 APs to use Channels 1, 6, 11, Include at least 2 APs on non-overlapping channels to support load balancing, Assign physically adjacent APs to the same WI-Fi channel

Back

Configure the 1st 3 APs to use Channels 1, 6, 11

Front

What is a recommended approach to avoid co-channel congestion while installing access points (APs) that use the 2.4GHz frequency? Options: One overlapping channel, Different overlapping channels, One non-overlapping channel, Different nonoverlapping channels

Back

Different nonoverlapping channels

Front

What occurs when overlapping Wi-Fi channels are implemented?

Back

Users experience poor wireless network performance

Front

What is a function of a Wireless LAN Controller (WLC)?

Back

Send LWAPP packets to access points

Answer explanation

Lightweight Access Point Protocol (LWAPP) is a Cisco protocol used for communications between the Wireless LAN Controller (WLC) and APs registered with the controller. It is used by the WLC to control multiple Wi-Fi APs.

Front

Which WLC port connects to a switch to pass normal access point traffic?

Back

Distribution system

Answer explanation

https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-6/configuration-guide/b_cg76/b_cg76_chapter_011010.html#ID106

A distribution system port connects the controller to a neighbor switch and serves as the data path between these two devices. Each distribution system port is, by default, an 802.1Q VLAN trunk port. The VLAN trunking characteristics of the port are not configurable.

Front

Which 802.11 management frame type is sent when a client roams between access points (APs) on the same SSID?

Back

Reassociation request

Answer explanation

In WLAN network, reassociation request frame is used by mobile stations in the following scenarios: (1) Moving from one basic service area to the other service area in the same extended service area. (2) Leaving the Wi-Fi network coverage area and comes back to the same area again.

Front

Which mode allows access points (APs) to be managed by Cisco Wireless LAN Controllers (WLCs)?

Back

Lightweight

Answer explanation

Autonomous or heavy weight APs were back in my day...you had to configure each one manually. Lightweight APs need to register with and be controlled by a WLC.

Front

Which device controls the forwarding of authentication requests for users when connecting to the network using a lightweight access point?

Back

Wireless AP

Front

Match the wireless standard to the correct description. Options: 2-1-4-5-3, 5-1-4-2-3, 5-3-4-2-1, 5-4-3-2-1

Back

5-3-4-2-1

Front

Which type of wireless encryption is used for WPA2 in preshared key mode? Options: TKIP with RC4, RC4, AES-128, AES-256

Back

AES-256

Answer explanation

There is debate over the 128/256. I knew that WPA2 PSK uses AES, but I didn't know how many bits...hard to find as Cisco just says it uses AES. Here's a website that shows you can enter up to 64 hex digits on WLC for WPA2 PSK and that is 256 bits

https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/67134-wpa2-config.html