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ICND2 - VLANS & VTP
CCNA VLANS & VTP
| Question | Answer |
|---|---|
| All devices in a VLAN must be in ? | Same broadcast domain |
| 2 types of VLAN tagging for trunk links | 802.1Q & ISL (Inter-Switch Link) |
| IEEE standard trunking protocol that adds an extra 4-byte VLAN header and changes the CRC value. | 802.1Q |
| Max number of VLANS supported by 802.1Q | 4096 VLANS |
| 802.1Q supports native VLANS and does not tag the frames in the native VLAN | True |
| Cisco proprietary trunking protocol that inserts an extra 26-byte header and a 4-byte CRC trailer | ISL |
| MTU byte size for 802.1Q / ISL? | 802.1Q = 1522 bytes / ISL= 1548 bytes |
| Max number of VLANS supported by ISL (Inter-Switch Link) | 1000 VLANS |
| 2 Config commands to create a VLAN | (config)vlan #### or (config-if)switchport access vlan #### (will create a new VLAN if it does not exist on the switch already and add the interface to the VLAN) |
| 2 Config commands to name a VLAN | (config)vlan #### name WORD or (config-vlan)name WORD |
| Changes to a VLAN are saved and become effective even before exiting VLAN config mode? | False |
| The config command that sets the port to access state unconditionally | (config-if)switchport mode access |
| VLANS that can not be deleted | 0-1, 1002-1005, 4095 |
| Native VLAN by default | VLAN 1 |
| You must do what for VLANS to be created or changed on the switch? | Exit VLAN config mode |
| Voice VLANS must have what enabled? | CDP |
| Voice VLANS are typically tagged with? | 802.1Q header |
| What is enabled by default on voice VLANS | PortFast |
| What kind of authentication can be enabled on a Voice VLAN? | 802.1x |
| Using the dot1p priority for voice traffic does what as the traffic passes through the native VLAN? | Tags the voice traffic as VLAN 0 and leaves the data traffic in the native VLAN. |
| Using the command switchport voice vlan none results in? | Data & Voice in the access VLAN (access port) |
| Using the command switchport voice vlan untagged results in? | Data & Voice in the native VLAN (802.1Q trunk port) |
| Command to show the VLAN name, status and ports assigned to the VLANS, but not the trunk ports | show vlan brief |
| Command to show data and voice VLAN IDs, the operational mode and encapsulation type | show interface switchport |
| Command to show VLANS whose traffic will be forwarded over the trunk. | show interfaces trunk |
| VLANS not pruned by VTP and VLANS in which the trunk is in an STP forwarding state can be viewed by using what command? | show interfaces trunk |
| The command switchport trunk allowed {add | except | remove} vlan #### does what to the trunk link? | adds or removes VLANS in the trunk's allowed list |
| Command used to configure the native VLAN for the trunk | switchport trunk native vlan #### |
| What can you verify by using the command show vlan id ####? | the access and trunk ports in the VLAN |
| Command that displays all known VLANS including VTP? | show vlan |
| DTP stands for | Dynamic Trunking Protocol |
| VTP stands for | VLAN Trunking Protocol |
| 4 DTP modes configured by the command <switchport mode ______________> | Access, Trunk, Dynamic Desirable, Dynamic Auto |
| Using the command <switchport mode dynamic auto> on both ends of a trunk port will result in a successful link. | False, one end will need to be set up using the command switchport mode trunk or switchport mode dynamic desirable |
| The <switchport mode dynamic desirable> command will create a successful trunk link if the port on the other end of the trunk link is set up by using the command switchport mode trunk. | True, it would also work with the command switchport mode dynamic auto. |
| What command can be used to specify the administrative encapsulation type of a trunk link? | switchport trunk encapsulation {dot1q | isl | negotiate} |
| Static trunk interfaces can negotiate except when configured with what command? | switchport nonegotiate |
| 4 VTP modes | Server, Client, Transparent, Off |
| If VTP is turned off a VLAN will not send, receive or forward VTP messages, and you can configure standard and extended range VLANS on the switch. | True |
| VTP is a Cisco proprietary protocol that allows users to configure a VLAN on a VTP server switch and have it distributed to other switches in the same VTP domain. | True |
| VTP versions 1 & 2 can not be used together in the same network. | False |
| VTP version 3 offers what advantages over version 1 & 2 | More secure and supports extended range VLANS |
| VTP servers store vtp commands and configurations where? | vlan.dat file in the flash |
| VTP clients can create, delete and configure VLANS. | False |
| When a switch is in transparent mode in VTP it will not send/receive VTP message but will _____________ ? | forward them |
| VTP packets are sent to the destination MAC address? | 01-00-0C-CC-CC-CC |
| VTP message types | Summary advertisements, Advertisement requests, Subset advertisement, VTP join messages |
| 32-bit number that indicates the level of revision for a VTP packet | configuration revision number |
| When you add, delete, or change a VLAN in VTP server what happens? | The configuration revision number increments and the switch issues a summary advertisement. |
| After receiving a summary advertisement with a higher config revision number a VTP enabled switch does what? | sends an advertisement request |
| Summary advertisements are sent out every ____ minutes by default and does not contain any _________ ? | 5, VLAN info |
| Subset advertisements contain the info about the changes to ? | VLAN configuration database |
| A switch needs a VTP advertisement request in these situations | The switch has been reset, VTP domain name has been changed, switch has received a VTP summary advertisement with a higher configuration revision than its own |
| VTP pruning removes VLANS from a switch for what reason? | Because there are no access ports on that switch in those VLANS and it prevents frame flooding |
| Switch A belongs to the Cisco VTP domain and Switch B belongs to the cisco VTP domain, will the two switches synchronize using VTP? | NO, because VTP domains are case-sensitive. (Passwords are case-sensitive also) |
| VTP transparent mode switches do not need the version number. | False |
| Command to show the revision number, version, mode, domain, pruning status, etc. of the VTP running on the switch. | show vtp status |
| Command to see the VTP password which is encrypted in V3 | show vtp password |
| Command used to list all the learned or configured VLANS on a switch | show vlan brief |
| The minimum requirement for two VTP switches in the same VTP domain to synchronize with each other. | At least one switch in server mode and one operational trunk link between the two switches |
| The MD5 digest refers to what in VTP? | Confirming that the domain name and password are the same. |
| VTP 1 & 2 do not have to match for use in the same network. | True, but version 3 does not work with version 1 |
| Command used to enable pruning on a VTP domain | vtp pruning (run on VTP server only) |
| What will a VTP client do when a command is run to create/delete or configure a vlan? | Reject it immediately for standard range VLANS and reject it upon exiting VLAN config for extended range VLANS |
| If a new switch configured as a VTP server with a higher revision number and the same VTP domain info is added to a network already running VTP what will happen? | VTP Wipeout, all other switches on the domain will get their update from the newly added switch. |
| How to reset the revision number on a VTP enabled switch | Config switch to VTP transparent mode and back to normal or erase the vlan.dat file and reload the switch |
Created by:
Jjwtwo
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