Deck 3

Question 1

Layer 2 tunnels encapsulate LWAPP traffic between what two points?

ALSO, what do these tunnels require of these two points?

Answer 1

-AP and the WLC
-IP addr on both ends

Question 2

Layer 3 tunnels support what type of tunneling within Ethernet frames and UDP packets?

Also, they support UDP/UDP lite for which deploymens?

Answer 2

-LWAPP
-IPV6

Question 3

devices communicate through a central device called an access point (AP). The access point serves as the hub or gateway

refers to a collection of one or more interconnected Basic Service Sets (BSS). A BSS is the basic building block of a WLAN (Wireless Local Area Network) and consists of one access point (AP) and multiple wireless clients

Answer 3

-infrastructure mode

-extended service set

Question 4

option of WIFI where cells across different APs are linked together?

what does an independent basic service set do?

Answer 4

-distribution system
-allow direct comms between clients w/o a central access point

Question 5

PortFast enabled on an interface connected to another switch immediately does what?

Answer 5

-immediately enables forwarding state
-can cause a broadcast storm (switching loops will be ignored)

Question 6

Profile that is selected in GUI when configuring voice over WLAN?

Answer 6

Platinum

Question 7

what command ensures a switch is ALWAYS and (THE ROCK MEANS ALLLWAYS!) the root for, say, a vlan 750?

Answer 7

(config)#spanning-tree vlan 750 root primary

Question 8

what vlans must match when setting up trunking?

Answer 8

-Native vlans

Question 9

service ports are used for what?

ALSO, what are dynamic interfaces used for?

Answer 9

-out of band management of a WLC

-communication for wireless clients

Question 10

in a mobility group setup with WLCs in different places, it anchors inter-controller data

Answer 10

-virtual interfaces

Question 11

A unified access point mode that continues to serve wirelessly after connectivity to LAN controller ceases?

Answer 11

-flexconnect

Question 12

“show cdp neighbor” shows what?

Answer 12

-capability codes (R-router, s-switch, etc)

Question 13

Static persistence (aka “on” mode), without negotiation, configures what between two switches?

Answer 13

-etherchannel

Question 14

mode that allows APs to be managed by a Wireless LAN controller?

-what does it mean?

Answer 14

-LAP (lightweight)
-means can’t independent of a wireless controller

Question 15

Creating a wlan in Cisco wlan controller. what MUST be created?

Answer 15

-ssid
-profile name

Question 16

VTP mode of transparent means:

Answer 16

switch FORWARDS but doesn’t process VTP updates

Question 17

with DTP, a dynamic auto switch is willing to become a trunk but…

what happens with a dynamic desirable switch?

Answer 17

won’t negotiate

-actively tries to negotiate trunking

Question 18

Untagged PC data goes to a CISCO IP phone. What happens?

Answer 18

it goes thru unchanged

Question 19

802.11b wireless infrastructure best practice is allocating…

Answer 19

nonoverlapping channels

Question 20

to have untagged vlan traffic what must be done and whats the command?

Answer 20

make that vlan the native vlan for both connected interfaces on the switches

switchport trunk native vlan #

Question 21

These commands are setting up an etherchannel. what kind and how?

-interface port-channel 10 no switchport and ip address 172.16.0.1 255.255.255.0

-interface GigabitEthernet0/0/1 channel-group 10 mode active

Answer 21

it’s a layer 3 etherchannel because “no switchport” and an IP address are there

-second command is assigning an interface to the created channel and using an open standard protocol (hence mode active which sets up LACP negotiation)

Question 22

to create an etherchannel what two modes are used in a sequence? and why?

Answer 22

active and passive

ex: int range g0/0-1 channel-group 10 mode active

int range g0/0-1 channel-group 10 mode passive

TO ACHIEVE BALANCE

Question 23

Phones and Computers, when configured proper don’t send traffic in the same…

Answer 23

vlan

Question 24

command that enables the industry standard equivalent of Cisco’s CDP?

Answer 24

lldp run (from conf t)

Question 25

3 lldp timers

Answer 25

-lldp holdtime
-lldp reinit delay (delay for lldp to initialize)
-lldp timer rate (sending frequency)

Question 26

CDP neighbor has no IP. what happens?

Also what command is used to view IPs in cdp?

Answer 26

not much, cdp will go on normally

show cdp neighbor detail

Question 27

LACP 3 modes?
PAgP 3 modes?

which is proprietary to cisco?

Answer 27

-active, passive, on
-on, desirable, auto

PAgP

Question 28

what two vlan IDs indicate a default vlan?

Answer 28

1 and 1002-1005

Question 29

what two things appear in CDP?

Answer 29

native vlan and vtp domain

Question 30

PApG desirable and LACP active are equivalent in that they?

PApG auto and LACP passive are equivalent how?

Answer 30

-actively negotiate EtherChannel

-won’t negotiate. will only form if other end expresses interest (active for LACP, desirable for PApG)

Question 31

for VTP, ALL switch must..

Answer 31

-be able to perform trunk negotiation
-use same VTP version

Question 32

-root ports
-designated ports

Answer 32

-port with best BPDU/lowest cost to get to root bridge
-One per collision domain

Question 33

I want to make a specific interface the preferred forwarder. What do I change?

Answer 33

the port priority

Question 34

CDP best uses for an administrator, amongst others, are verifying layer 2 connectivity and providing

Answer 34

IPs

Question 35

-CDP doesn’t give extensive VLAN info. What does?
-CDP does NOT show routing protocols but it shows interfaces. what else doesn’t it show?

Answer 35

-show vlan/brief
-cables used