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79 Cards in this Set
- Front
- Back
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How many VLANs can an access port belong to? |
Only 1 |
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How many VLANs can a trunk port belong to? |
All VLANs |
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What is the minimum speed for a trunk link? |
100Mbps |
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What are the possible VLAN IDs? |
1 - 4094 |
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What VLAN are access ports a member of by default? |
VLAN 1 |
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Do different VLANs have to be on separate subnets? |
No, but it's best practice |
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What VLAN does control plane traffic use? |
The default VLAN (1 by default) |
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In terms of membership, what are the 2 types of VLANs? |
Static and dynamic |
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How do static VLANs work? |
Administrators manually assign a port to a VLAN |
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How does a dynamic VLAN work? |
Host MAC addresses are assigned to VLANs, and port membership is determined by the host connected to that port |
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What situations or devices are best for a static VLAN? |
Situations or devices where mobility is limited - desktops, servers, printers, etc. |
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What is a switch fabric? |
A group of switches sharing VLAN info |
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What command will configure a port as an access port? |
Switchport mode access |
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What command will assign a port to a particular VLAN? |
Switchport access vlan <#> |
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What is the purpose of trunking? |
To allow VLANs to span multiple switches |
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What command will configure a port as a trunk port? |
Switchport mode trunk |
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What type of ports allow you to add a second VLAN to an access port? |
Voice access ports |
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What are the 2 main methods of identifying VLANs? |
Inter-Switch Link (ISL) and 802.1q |
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Which method of identifying VLANs is more common and gaining ground? |
802.1q |
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How does Inter-Switch Link (ISL) identify a VLAN? |
It encapsulates a frame with the VLAN information |
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Who developed Inter-Switch Link (ISL)? |
Cisco |
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Who developed 802.1q? |
IEEE (open-source) |
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How does 802.1q identify a VLAN? |
It inserts a field into the frame |
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When is frame tagging removed from a frame? |
When it is sent out to an access port |
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When is frame tagging added? |
When the frame leaves an access port |
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What switch component is responsible for adding or stripping frame tags? |
The ASIC |
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What is a "baby giant"? |
A frame that was already at max size before 802.1q added frame tagging to it |
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What 2 devices can route traffic between VLANs? |
Routers and L3 switches |
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What capability does a router require before it can act as a router on a stick? |
Support for ISL or 802.1q |
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If a router does not support ISL or 802.1q, how can it route between VLANs? |
Each VLAN will require its own interface, just like if they were separate subnets |
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What is Inter-VLAN Routing (IVR)? |
Using an L3 switch to emulate a router on a stick |
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What is a Switched Virtual Interface (SVI)? |
A virtual switch interface that mimics a router interface for the purpose of routing VLAN data |
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Which is more efficient, IVR or router on a stick? |
IVR |
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What 3 protocols were designed to allow VLANs created on one switch to propagate to other switches? |
VLAN Trunking Protocol (VTP), GARP VLAN Registration Protocol (VGRP), and Multiple VLAN Registration Protocol (MVRP) |
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What does VLAN Trunking Protocol (VTP) do? |
Allows VLANs created on one switch to propagate to other switches in the switch fabric |
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What ate the 3 different VTP modes a switch can be in? |
Server, client, and transparent |
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What is the default VTP mode? |
Server |
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What is the VTP server mode? |
Mode where information about VLANs is allowed to propagate between switches, and VLANs may be created/modified/deleted |
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What is the VTP client mode? |
The switch receives information about VLANs from other switches and will send updates to other switch partners, but can't create/modify/delete VLANs themselves |
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What is the VTP transparent mode? |
A switch will receive VTP advertisements and pass them on to other switches, but do not update their own VLAN databases, and may create/modify/delete local VLANs |
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How are switches using Virtual Trunking Protocol (VTP) organized? |
Into management domains |
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How many management domains may a switch belong to? |
One |
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What will switches do with VTP advertisements from foreign management domains? |
Ignore them |
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What are used to share VTP information between switches? |
VTP advertisements |
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How are VTP advertisements addressed? |
As multicast transmissions |
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What is used to identify whether a VTP advertisement should be integrated into a switch's VLAN database or not? |
The VTP configuration revision number |
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What are the 3 types of VTP messages? |
Summary advertisements, subset advertisements, and advertisement requests |
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What does a VTP Summary Advertisement contain? |
A switch's VTP domain name and configuration revision number |
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How often does a switch send a VTP Summary Advertisement? |
Every 5 minutes |
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What does a switch do when it receives a VTP Summary Advertisement? |
Checks that the VTP domain matches and if the configuration revision number is higher than its own, and sends Advertisement Request if so |
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What is a VTP Advertisement Request? |
A request for a Summary Advertisement and Subset Advertisements |
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Under what 3 conditions would a switch send a VTP Advertisement Request? |
When the switch was reset, its VTP domain name changed, or it received a Summary Advertisement with a higher revision number |
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What does a switch do when it receives a VTP Advertisement Request? |
Sends the requestor a Summary Advertisement, followed by 1 or more Subset Advertisements |
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What is a VTP Subset Advertisement? |
A VTP advertisement with information about changes to a VLAN |
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What VTP advertisements are sent out when a switch makes a change to a VLAN? |
A Summary Advertisement, followed by 1 or more Subset Advertisements |
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What are the normal-range VLAN numbers? |
1 - 1005 |
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What are the extended-range VLAN numbers? |
1006 - 4094 |
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What VLAN numbers are restricted? |
1002 - 1005 |
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What VTP mode does a switch need to be in to make use of extended-range VLANs? |
Transparent mode |
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Is the VTP domain name case-sensitive? |
Yes |
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Is the VTP password case-sensitive? |
Yes |
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Should IP phones be placed in the same VLAN as the host at the same port? |
No, phones should be on a separate VLAN |
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What command is used to configure an interface to carry voice traffic? |
Switchport voice vlan <#> |
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What needs to be created on a router for it to function as a router-on-a-stick? |
A virtual interface for each vlan |
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What command tells an L3 switch to perform IVR? |
Ip routing |
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Once routing is set up on a switch, what step needs to be taken for a switch to function in IVR? |
Each vlan interface needs an IP address |
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What command configures a trunk to use 802.1q? |
Switchport trunk encapsulation dot1q |
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What VLAN numbers are available for use by default? |
2 - 1001 |
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What command is used to switch the native vlan? |
Switchport trunk native vlan <#> |
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Will "show vlan" display trunk ports? |
No |
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What VTP mode allows you to create extended vlans (1006+)? |
Transparent mode |
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What is Dynamic Trunking Protocol? |
A port starts trunking automatically is a compatible switch is attached to that port |
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What command will show configured trunk ports? |
Show interfaces trunk |
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What command will show you vlan info for an interface? |
Show int <interface> switchport |
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What does the VTP mode "dynamic auto" do? |
Puts the port in trunk mode if the neighboring port is in trunk mode or in desirable mode |
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What does the command "switchport nonegotiate" do? |
Prevents the interface from generating DTP frames |
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What command is used to limit the vlans that can be a part of a trunk? |
Switchport trunk allowed vlan <#'s> |
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What command will remove vlans from a trunk? |
Switchport trunk allowed vlan remove <#> |
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What does IVR stand for? |
Inter-VLAN Routing |
