Network Access

Question 1

Cisco AP sniffer mode

Answer 1

Captures wireless traffic for analysis, similar to the way a wired network sniffer behaves. The analyzer is typically software that is installed on another host

Question 2

Cisco AP Local Mode

Answer 2

A Cisco LWAP operating in local mode (which is the default) is capable of providing multiple basic service sets (BSSs) on a single channel. The connection between a LWAP and a WLC is created by using two tunnels established by the Control and Provisioning of WAP (CAPWAP) tunneling protocol

Question 3

Cisco AP FlexConnect Mode

Answer 3

A Cisco LWAP operating in FlexConnect Mode enables a failsafe if the CAPWAP connection goes down switching traffic between a given Service Set ID (SSID) and a VLAN

Question 4

Cisco AP Bridge Mode

Answer 4

A Cisco LWAP operating in Bridge Mode acts as a dedicated connection between two networks

Question 5

PortFast

Answer 5

Is an optional STP feature that reduces convergence time by immediately placing edge ports into a forwarding state. Cannot be used in conjunction with loop guard

Question 6

Loop Guard

Answer 6

Is an optional STP feature that places inconsistent ports into the blocking state, preventing a switch from transitioning to the forwarding state when it stops receiving BPDUs. When this happens, the port will be put into the loop-inconsistent state

Question 7

Root Guard

Answer 7

Is an optional STP feature used to prevent newly introduced switches from being elected the new root. It’s applied on a per-port basis with the spanning-tree guard root command

Question 8

BPDU Guard

Answer 8

Is used to disable ports that erroneously receive BPDUs. It’s applied to edge ports that have PortFast enabled for preventing a switch that has been connected to one of these ports, from causing loops

Question 9

BPDU Filter

Answer 9

This feature prevents PortFast-enabled ports from sending or receiving BPDUs. It behaves differently depending on whether it is enabled globally or only on specific ports

Question 10

Autonomous AP Deployment

Answer 10

Connects a wireless client to a wired network without requiring a separate WC. An autonomous AP contains network interfaces for both wireless and wired networks

Question 11

Embedded AP Deployment

Answer 11

Connects a wireless client to a wired network but requires a separate WC. The difference is that the WLC is embedded within a stack of switching hardware instead of existing as a separate entity

Question 12

show cdp neighbors command

Answer 12

displays the following information

• Device ID
• Capabilities
• Product Number
• Holdtime
• Local/Remote Interface

Question 13

ATIM Frame

Answer 13

An Announcement Traffic Indication Message is a 802.11 management frame used by wireless stations in an Ad Hoc network to inform other stations that they must not enter a power-saving mode because buffered data exists for them

Question 14

802.11 Control Frames

Answer 14

Used to manage access to the wireless medium. Examples are Ready To Send (RTS) Clear-to-Send (CTS), ACK and Power Save (PS) Poll

Question 15

802.11 Data Frames

Answer 15

Used to convey user data through the wireless network. Numerous types of data frames exist; however, there are two general categories of data frames: Contention Free (CF) service frames and Contention-Based service frames

Question 16

WLCs Dynamic Interfaces

Answer 16

Are user-defined and typically used for client data. A WLC can contain up to 512 dynamic interfaces

Question 17

WLC AP-manager Interface (Static)

Answer 17

Is a static interface which controlls all layer 3 communications between a WLC and a LWAP

Question 18

WLC Management Interface

Answer 18

Is used for in-band management information. This static interface is used for all layer 2 LWAPP communication between the controller and the LWAP

Question 19

Service Port Interface

Answer 19

Is a physical interface used for maintenance purposes on a WLC and can also be used to recover the WLC in case of failure

Question 20

Virtual Interface

Answer 20

Can be used to provide a specific IP address that is the same accross multiple controllers when wireless clients roam among them.

Question 21

Cloud-based AP Deployment

Answer 21

Connect to and is automatically configured by a WLC that is housed in a cloud-based system. For example a Cisco Meraki AP provides wireless access by connecting to a centralized management system known as Cisco Meraki Cloud

Question 22

802.11 Management Frames

Answer 22

Used to manage the connection between an AP and a wireless client. Example: beacons, probe requests/responses, association requests/responses, authentication requests/responses, ATIM (Announcement Traffic Indication Messages)