Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ICND-1 > 8 - Advanced Switching Concepts > Flashcards

8 - Advanced Switching Concepts Flashcards

1
Q

What is a LAN?

A

a set of devices in a single broadcast domain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are some benefits of VLANs?

A
  1. reduce the number of broadcast domains
  2. increase security because traffic is not seen by another vlan unless its routed
  3. qos can be maintained for each vlan
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the routing of packets between VLANs

A

intervlan routing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why should subnets used by vlans on your network be contiguous?

A

to facilitate route summarization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are valid vlan ids?

A

1 - 4094

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What vlan ids are reserved?

A

0 hidden system use
1002 - 1005 token ring and fiber distributed data interface
4095 hidden system use

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What command can be used to show a brief summary of vlans on a switch?

A

show vlan brief

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What type of port carries traffic for only one vlan?

A

access port

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what command is used to set the access vlan back to its default?

A

no switchport access vlan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the command to dynamically map mac addresses to a vlan?

A

switchport access vlan dynamic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of port carries traffic from multiple vlans?

A

trunk port

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the two trunk encapsulation types?

A

ISL or inter switch link

802.1q

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How do you identify the vlan that a frame belongs to/

A

a tag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Describe ISL encapsulation.

A

cisco proprietary ecapsulation that encapsulates each from inside of a 26 byte ISL header and 4 byte crc trailer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe 802.1q encapsulation.

A

standards based trunking protocol developed by IEEE that inserts a 4 byte vlan field into the frames existing ethernet header

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What encapsulation method has support for a native vlan?

A

802.1q

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the outcome for a native vlan mismatch?

A

traffic sent to an incorrect vlan

cdp errors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What needs to match on both sides of a trunk link?

A

native vlan
trunking mode
trunk encapsulation
allowed vlan ids for the trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What command is useful in providing a variety of helpful output for both access and trunk ports?

A

show interfaces fa0/0 switchport

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What command is useful in verifying trunk ports?

A

show interfaces fa0/0 trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is useful about the show interfaces fa0/0 trunk command?

A

you can see the allowed vlans for a trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Why is voice traffic usually separated from data traffic?

A

for performance purposes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What happens when the voice vlan is configured on a port?

A

portfast is automatically enabled

24
Q

how do you enable qos on the voice vlan?

A

trust device cisco-phone

25
Q

What is the limitation for port-security on a voice vlan?

A

You cannot statically configure mac addresses on a voice port, you have to use the maximum 2 command at a minimum

26
Q

What command causes the ip phone to use 802.1p tagging with a priority of 5 instead of 802.1q causing it to transit over the native vlan?

A

switchport voice vlan dot1p

27
Q

What command causes the ip phone to behave as if it were not connected to a switch, using its own config and traversing the access vlan?

A

switchport voice vlan none

28
Q

What command causes the ip phone to send untagged voice traffic just as if the switchport voice vlan command was not used?

A

switchport voice vlan untagged

29
Q

How do you disable DTP?

A

switchport nonegoiate

30
Q

What is ciscos recommendation for trunk links?

A

set both sides of the trunk to dynamic desirable when using DTP

31
Q

What are different modes of a switchport?

A

access
trunk
dynamic desirable
dynamic auto

32
Q

What is dynamic desirable?

A

a port that will actively negotiate to become a trunk port

33
Q

What is dynamic auto?

A

a port that will no actively negotiate to become a trunk port

34
Q

What is the outcome if you have two switchports that are configured for dynamic auto?

A

they will be access ports and not trunk ports

35
Q

What is the outcome if you have two switchport that are configured for dynamic deseriable?

A

they will be trunk ports

36
Q

What is the outcome if you have one switchport as dynamic auto and one switchport as dynamic desirable?

A

they will be trunk ports

37
Q

What layer does vtp operate at?

A

Layer 2

38
Q

What are the requirements for VTP to operate?

A

switches must be connected over a trunk
vtp domain must match
vtp password must match
vtp version must match

39
Q

what is the default vtp domain name?

A

NULL

40
Q

how many vtp domains can a switch belong to?

A

one

41
Q

What happens to a switch that is configured for the NULL domain receives a vtp advertisement with a different vtp domain name?

A

it will change its vtp domain to match

42
Q

What vtp version is configured by default?

A

vtp version 1

43
Q

What happens if a vtp version 1 switch receives a vtp version 2 advertisement?

A

the switch will change to version 2 if it is supported on that swithc

44
Q

What is the default vtp mode of cisco switches?

A

server mode

45
Q

Where do vtp version 3 clients store their vlan configuration?

A

NVRAM, vtp version 1 and 2 clients do not keep the vlan configuraton

46
Q

What does vtp transparent mode do?

A

Transparent mode will forward vtp advertisements, but not update its own vlan table. Transparent mode keeps its local vlan configuration in nvram

47
Q

How often do vtp servers and clients flood their advertisements?

A

every 5 minutes or when a change is made

48
Q

What vlan is used for vtp advertisements?

A

vlan 1

49
Q

How do switches keep track of the changes to the vlan database?

A

incrementing the configuration revision number

50
Q

Can a vtp client cause a vtp server to be updated?

A

Yes, if the clients revision number is higher than the servers revision number

51
Q

What is the revision number of a vtp transparent switch?

A

revision 0

52
Q

How do you delete the vlans on a switch?

A

deleting the vlan.dat from flash or nvram

53
Q

what is vtp pruning?

A

prunes vlan traffic to switches that are not participating in a particular vlan

54
Q

Is vtp pruning enabled by default?

A

its disabled by default

55
Q

How do you configure vtp pruning?

A

global configuration mode, vtp pruning

56
Q

How can you have intervlan routing when you only have layer 2 switches?

A

using router on a stick

ICND-1 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions