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40 Cards in this Set
- Front
- Back
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In a LAN, what term best equates to the term VLAN - Collision domain, broadcast domain, Subnet, or trunk?
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Broadcast Domain
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If a switch has three configured VLANs, how many IP subnets are required?
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3
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When switch forwards a frame to a second switch using 802.1Q trunking, how does the first switch change or add to the Ethernet frame before forwarding?
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It inserts a 4-byte header and does not change the MAC address
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For an 802.1Q trunk between two switches, which frames do not include an 802.1Q header?
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Frames in the native VLAN
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What two commands could you use to allow trunking on a switch connected to a second switch configured with "dynamic auto"
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'Trunking turned on' OR 'dynamic desirable'
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What two commands will identify switch interfaces as being trunking interfaces?
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'show interfaces switchport' and 'show interfaces trunk'
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What is essentially identical to a given "Broadcast Domain"?
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A LAN
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Reducing a VLAN to a single access switch reduces the workload for what protocol?
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Spanning-Tree Protocol (STP)
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How does VLAN tagging modify a frame?
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It adds a trunking header containing the VLAN identifier (VLAN ID) field to the frame
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What process allows switches to send data for multiple VLANs over a single link?
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Trunking
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What two trunking protocols are used by Cisco devices?
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IEEE 802.1Q and Inter-Switch Link (ISL)
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What are the sizes of the 802.1Q VLAN header and its VLAN ID field?
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4 bytes, and 12 bits
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What is the normal VLAN range and what is the extended range?
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1-1005, and 1006-4094
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What is the only VLAN that the 802.1Q protocol does not add a header to frames on it?
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The native VLAN(Default of VLAN 1)
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What is the primary function of a native VLAN?
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To allow connection to devices that do not understand trunking
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What is a multilayer switch?
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A switch that can use Layer 3 (Network) logic in its routing protocols
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If two groups of PCs reside in separate VLANs, they must also reside in separate...
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Subnets
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What Layer of the OSI model controls the routing and forwarding of data across multiple VLANs?
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Layer 3
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What device can combine the roles of a switch and a router only used to route packets between VLANs?
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A Layer 3 Switch
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What configuration mode must the user be in the CLI to run the 'vlan (vlan ID)' command?
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Global configuration
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What is the default name for VLAN 940?
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"VLAN0940"
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What command would you enter when configuring a given interface to make it an access interface for VLAN 22?
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'switchport access vlan 22'
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What command prevents an interface from autonegotiating to a trunk interface?
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'switchport mode access'
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What command is used to display a short table of a switch's VLAN settings?
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'show vlan brief'
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What are the three modes of VLAN Trunking Protocol (VTP)?
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Server, client, or transparent
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In what VTP mode is a switch unable to configure VLANs?
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Client
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In what VTP mode can switches only configure VLANS in the standard range?
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Server
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What two VTP modes prevent the 'show running-config' command from listing VLAN details?
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Server and client
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What VTP mode is assumed to be active for all ICND1 example switches, and is analogous to turning it off?
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Transparent
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What command is used to disable VTP in global configuration?
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'vtp mode off'
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What can VTP do if its settings are modified on an active LAN?
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Overwrite the VLAN settings of other connected switches
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What protocol allows a switch to automatically negotiate either 802.1Q or ISL as its trunking protocol?
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Dynamic Trunking Protocol (DTP)
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What command can assign a protocol or allow autonegotiation for trunking protocols in interface configuration?
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'switchport trunk encapsulation (param)'
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What two modes for a given switch port govern whether trunking should be used, and what the port is currently doing?
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Administrative Mode and Operational Mode
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What 'switchport mode' parameter instructs a switch to passively receive trunk negotiation messages and negotiate if it receives one?
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dynamic auto
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What 'switchport mode' parameter instructs a switch to initiate negotiation messages to choose whether to activate trunking?
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dynamic desirable
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When establishing a trunk between two switches, what pair of trunk operational modes should you avoid combining?
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'access' and 'trunk'
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What interface configuration command disables DTP negotiation and should be used on non-trunking ports for security reasons?
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switchport nonegotiate
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What interface configuration command is used to limit the VLANs allowed on a given trunk?
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'switchport trunk allowed vlan (param)'
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What would the command 'switchport trunk allowed vlan except 100-200' do?
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Allows all VLANs to use that trunk except VLANs 100 through 200
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