CCNA 1.11, 2.6, 5.9-.10 - Wireless

Question 1

Describe the bands and max data rate of 802.11-1997.

Answer 1

2.4GHz, 2Mbps

Question 2

Describe the bands and max data rate of 802.11b.

Answer 2

2.4GHz, 11Mbps

Question 3

Describe the bands and max data rate of 802.11g.

Answer 3

2.4GHz, 54Mbps

Question 4

Describe the bands and max data rate of 802.11a.

Answer 4

5GHz, 54Mbps

Question 5

Describe the bands and max data rate of 802.11n.

Answer 5

2.4 or 5GHz, 600Mbps

Question 6

Describe the bands and max data rate of 802.11ac.

Answer 6

5GHz, 6.93Gbps

Question 7

Describe the bands and max data rate of 802.11ax.

Answer 7

2.4 or 5Ghz, ~28Gbps

Question 8

What is an IBSS?

Answer 8

An Independent Basic Service Set is aka an “ad hoc” network between two wireless devices, and does not require an AP or BSS.

Question 9

Which channels in the 2.4GHz band are non-overlapping?

Answer 9

1, 6, and 11

Question 10

Which channels in the 5 GHz band are non-overlapping?

Answer 10

All of them are non-overlapping

Question 11

By default, the BSSID is based on…

Answer 11

The AP’s MAC address

Question 12

In an Extended Service Set, APs will share an _____ but have different ______.

Answer 12

SSID (e.g. “CorpNet”), BSSIDs (MAC address based identifiers)

Question 13

Which frequency has a farther reach, 2.4 or 5GHz?

Answer 13

2.4GHz

Question 14

MIC stands for

Answer 14

Message Integrity Check

Question 15

TKIP is used for ______ and has been deprecated and replaced by _____ and ______.

Answer 15

1) privacy and integrity
2) CCMP
3) GCMP

Question 16

Although deprecated, TKIP can still be used in ____.

Answer 16

WPA

Question 17

What data encryption and integrity protocol is used in WPA2?

Answer 17

CCMP

Question 18

A pre-shared key is used in what two wifi configurations?

Answer 18

WPA2 personal and WPA3 personal

Question 19

WEP keys can be ____ or ____ bits long.

Answer 19

40 or 104

Question 20

What is Cisco’s proprietary authentication, meant to replace WEP but has been largely deprecated?

Answer 20

LEAP (Lightweight EAP)

Question 21

Two authentication methods which use an “inner” and “outer” authentication are:

Answer 21

1) EAP-FAST
2) PEAP

Question 22

EAP-TLS improves upon PEAP by…

Answer 22

Requiring both the authentication server (AS) and each user to have a digital certificate

Question 23

What early encryption/integrity method has been deprecated?

Answer 23

TKIP

Question 24

CCMP is used in _____; GCMP is used in _____.

Answer 24

WPA2, WPA3

Question 25

What are the authentication/encryption methods used in WPA, WPA2, and WPA3?

Answer 25

1) TKIP 2) AES CCMP 3) AES GCMP

Question 26

What is 802.1x?

Answer 26

An authentication method used by all instances of WPA. 802.1x is the opposite of using a pre-shared key.

Question 27

An SSID can contain up to ___ characters.

Answer 27

32

Question 28

True or false: an SSID is case-sensitive.

Answer 28

True

Question 29

What does CAPWAP stand for, and in what architecture is it used?

Answer 29

Control and Provisioning of Wireless Access Points, used in Split-MAC architectures.

Question 30

APs in a Split-MAC architecture are referred to as ______ APs.

Answer 30

Lightweight

Question 31

What transport-layer ports are used for CAPWAP tunnels?

Answer 31

Control: UDP 5246 Data: UDP 5247

Question 32

A centralized WLC can support up to ______ lightweight APs.

Answer 32

6000

Question 33

If a WLC is in a public cloud, what mode must the APs operate in?

Answer 33

FlexConnect mode

Question 34

If a WLC is connected to the core of a network, this is referred to as ____

Answer 34

Centralized WLC deployment

Question 35

If a WLC is located in the distribution layer of a network, this is referred to as _____

Answer 35

distributed WLC deployment

Question 36

Distributed WLCs can handle how many APs?

Answer 36

250

Question 37

If a WLC is co-located with a group of APs at a branch site, this is referred to as ______

Answer 37

Embedded WLC deployment or controllerless wireless deployment - the WLC function is hosted on an AP itself

Question 38

An embedded WLC can support how many APs?

Answer 38

100

Question 39

What are the five types of WLC deployments?

Answer 39

Cloud, centralized, distributed, embedded, or autonomous (none).

Question 40

What are the two sub-modes of FlexConnect mode?

Answer 40

connected or standalone

Question 41

What are the eight AP modes available?

Answer 41

Local Monitor FlexConnect Sniffer Rogue detector Bridge Flex+Bridge SE-Connect Let My Fucking Sniffer Run By Fast, Sir!

Question 42

What do CCMP and GCMP do?

Answer 42

Provide privacy and integrity

Question 43

The IOS-XE wireless controller works at layer ____ while the AireOS controller works at layer ___.

Answer 43

2, 3

Question 44

Wireless controllers can support how many WLANs?

Answer 44

512

Question 45

An AP can support how many WLANs?

Answer 45

16

Question 46

How frequently are beacons sent from APs?

Answer 46

Every 100ms

Question 47

From a design perspective, the maximum number of WLANs on a single AP should be limited to ___

Answer 47

5, or 3 would be best

Question 48

What are the three main wireless frame types?

Answer 48

Management, Control, and Data

Question 49

Cisco's cloud-based AP management service is called ____

Answer 49

Meraki

Question 50

True or false: CAPWAP control messages are authenticated and encrypted by default.

Answer 50

True

Question 51

True or false: CAPWAP data messages are authenticated and encrypted by default.

Answer 51

False

Question 52

What is WLSE?

Answer 52

Wireless LAN Solution Engine, a way of centrally managing autonomous APs.

Question 53

What are the differences between WLC and WCS?

Answer 53

WLC is a hardware device, WCS is software. Both manage lightweight APs.