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19 Cards in this Set
- Front
- Back
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What is a Native VLAN?
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On an 802.1q trunk, frames associated with the Native VLAN are untagged.
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What is the default Native VLAN?
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1
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What are some common trunk misconfigurations?
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trunk mode mismatch
trunk encapsulation mismatch native VLAN mismatch allowed ports |
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What is the Inter-Switch Link Protocol (ISL)?
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A Cisco-proprietary method of tagging frames over a trunk.
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Do ISL trunks have Native VLANs?
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No
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How much does an ISL tag add to a frame?
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30 bytes (26 header + 4 trailer)
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What is a Port VLAN ID (PVID)?
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It associates a port with a VLAN.
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What is a Switched Virtual Interface (SVI)?
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A logical Layer 3 interface that represents an entire VLAN.
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What VLANs are automatically created?
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1 & 1,002 - 1,005
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What is the standard VLAN range?
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1 - 1,005
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What is the extended VLAN range?
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1 - 4,094
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What is the default VLAN MTU size?
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1,500 bytes
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What is VLAN tagging?
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The act of a frame getting assigned a user created value (VLAN ID).
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What does a VLAN trunk do?
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Carry multiple VLANs on a single link.
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What command will disable trunking on a port?
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switchport mode access
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What are the five configurable switchport trunk modes?
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access
trunk nonegotiate dynamic desirable dynamic auto |
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What are the three switchport trunk encapsulation options?
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ISL
dot1q negotiate |
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What is the default trunk encapsulation setting?
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negotiate
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What command will allow you to edit the VLANs allowed on a trunk?
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switchport trunk allowed vlan
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