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CCNA > Day 3 - Trunking, DTP, and Inter-VLAN Routing > Flashcards

Day 3 - Trunking, DTP, and Inter-VLAN Routing Flashcards

1
Q

What is DTP?

A

Dynamic Trunking Protocol

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2
Q

Define a trunk

A

A trunk is a switch port that can carry multiple traffic types, each tagged with a unique VLAN ID.

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3
Q

What is the first configuration task when implementing VLAN trunking?

A

To configure the desired interface as a Layer 2 switch port.

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4
Q

What is the command to configure an interface as a Layer 2 switch port?

A

the switchport command

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5
Q

When is the switchport command required?

A

on Layer 3 capable switches

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6
Q

What is the second configuration task when implementing VLAN trunking?

A

Specify the encapsulation protocol.

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7
Q

What is the command to specify the encapsulation protocol for a trunk link?

A

switchport trunk encapsulation [option]

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8
Q

What are the three options for the switchport trunk encapsulation command?

A

dot1q
isl
negotiate

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9
Q

What is dot1q encapsulation?

A

forces the switch to use IEEE 802.1Q encapsulation.

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10
Q

What is isl encapsulation?

A

forces the switch to use ciscos ISL encapsulation

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11
Q

What is negotiate encapsulation?

A

specifies that if Dynamic Inter-Switch LInk Protocol (DISL) and the Dynamic Trunking Protocol (DTP) negotiation fails to agree on the encapsulation, then ISL is the selected format.

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12
Q

What is DISL?

A

Dynamic Inter-Switch Link protocol

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13
Q

What is DTP?

A

Dynamic Trunking Protocol

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14
Q

What command would you use to validate proper trunking configuration?

A

show interface [name]

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15
Q

What is the third trunk port configuration step?

A

to implement configuration to ensure that the port is designated as a trunk port.

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16
Q

What are the two ways to designate a port as a trunk port?

A

Manual (static) trunk configuration

Dynamic Trunking Protocol (DTP)

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17
Q

What is the command for manual configuration of a port for trunking?

A

switchport mode trunk

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18
Q

What command would you use to validate manual port trunking configuration?

A

show interfaces [name] switchport

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19
Q

It is a good practice to disable the sending of DISL and DTP packets on a statically configured trunk port. What is the command to do this?

A

switchport nonegotiate

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20
Q

What are the two DTP modes that a switch port can use?

A

Dynamic desirable

Dynamic auto

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21
Q

If two switches are each set to dynamic auto will they establish a trunk between them or not?

A

they will not because dynamic auto mode is passive

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22
Q

What is the command to see dynamic trunking protocol information both globally and for a specific interface?

A

show dtp

show dtp [interface ]

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23
Q

What is the command to change the default native VLAN?

A

switchport trunk native vlan [number]

24
Q

Routing traffic between different VLANs is know as?

A

inter-VLAN routing

25
Q

What are the three methods of implementing inter-VLAN routing?

A

using physical router interfaces

using router subinterfaces

using switched virtual interfaces

26
Q

What are the pros and cons of using physical router interfaces to implement inter-VLAN routing?

A

simple and easy to implement

not scalable

27
Q

What are the pros and cons of using router subinterfaces to implement inter-VLAN routing?

A

scalable, only one physical router interface is required

physical interface bandwidth is shared and can become a bottleneck

28
Q

Do routers and switches support DTP?

A

Only switches support DTP.

29
Q

Inter-VLAN routing using a single router interface is also referred to as ?

A

router-on-a-stick

30
Q

What type of switch supports the configuration of IP addressing on physical interfaces?

A

Multilayer or Layer 3 switches

31
Q

SVIs are ?

A

Switched Virtual Interfaces

32
Q

What command is used to allow the configuration of IP addressing on physical switch interfaces?

A

no switchport

33
Q

What type of switch supports SVIs?

A

Multilayer or Layer 3 switches

34
Q

Define SVIs

A

logical interfaces that represent a VLAN

35
Q

SVIs are automatically created when a Layer 2 VLAN is created. True or False?

36
Q

What is the command to configure an SVI?

A

interface vlan [number]

37
Q

When using Multilayer switches what is the recommended method for configuring an inter-VLAN routing solution?

38
Q

What are the two commands that can verify that SVI is properly configured?

A

show interface vlan [number]

show interface [number]

39
Q

What is SDM?

A

Switch Database Management

40
Q

What are the SDM options on a 2960 switch?

A

Default
Dual IPv4/IPv6
Lanbase-routing
QoS

41
Q

What are the Switch Database Management commands?

A

(config) smd prefer [option]

show sdm prefer

42
Q

What is VTP?

A

VLAN Trunking Protocol

43
Q

What does VTP manage?

A

the addition, deletion and renaming of VLANs on switches in the same VTP domain

44
Q

What are some of the benefits of using VTP?

A

Accurate monitoring and reporting of VLANS
VLAN consistency across the network
Ease of adding and removing VLANs

45
Q

What are the available VTP modes and which is the default?

A

Server (default)
Client
Transparent

46
Q

Describe VTP Server mode

A

the switch is authorized to create, modify and delete VLAN information for the entire VLAN domain

47
Q

Describe VTP Client mode

A

the switch will receive VTP information and apply any changes, but it does not allow adding, removing or changing VLNAN information on the switch

48
Q

Describe VTP Transparent mode

A

the switch will forward the VTP information received out of its trunk ports, but it will not apply the changes.

49
Q

What is the command to stop unnecessary VLAN information on switches in a VTP domain?

A

vtp pruning

50
Q

What is the command to check VTP configuration?

A

show vtp status

51
Q

How do you reset the VTP revision number on a switch?

A

change the VTP domain name and then change the name back to the original name

52
Q

What is the command to change or set the VTP domain?

A

(config) vtp domain [name]

53
Q

If inter-VLAN routing is not working how should you troubleshoot?

A
  • check to see that the link between the switches and routers is setup correctly
  • check that the relevant VLANs are allowed
  • check that the router’s subinterfaces are configured with the correct encapsulation and VLAN and that the subinterface’s IP is the default gateway for the hosts
54
Q

If VLANs cannot be created how should you troubleshoot?

A
  • check whether the VTP mode on the switch is set to client

* check to see if you have exceeded the number of VLANs allowed on the switch

55
Q

Host within the same VLAN cannot reach each other, how should you troubleshoot?

A
  • check that the hosts in the VLAN have IPs belonging to the same subnet
  • if the hosts are not connected to the same switch, ensure that trunk links between the switches are working correctly
56
Q

If VTP information is not reaching the client what should you check and what are the commands?

A

that the correct VTP domain and password have been configured using show VTP status and show vtp password

CCNA (3 decks)

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