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Fichas

VLANS

troussel ICND 2 Studies Inglés 15 fichas

Fichas del conjunto (15)

  1. 1What are VLANs?VLANs are broadcast domains in a Layer 2 network.
    Each broadcast domain is like a distinct virtual bridge within the switch. Each virtual bridge created in a switch defines a broadcast domain. By default, traffic from one VLAN cannot pass to another VLAN. Each user in a VLAN is also in the same IP subnet. Each switch port can belong to only one VLAN. The exception to this is if the port is a trunk port.
  2. 2What are the four characteristics of a typical VLAN setup?The four characteristics of a typical VLAN setup are as follows:
    - Each logical VLAN is like a separate physical bridge.
    - For different VLANs to communicate with each other, traffic must be forwarded through a router or Layer 3 switch.
    - Each VLAN is considered to be a separate logical network.
    - VLANs can span multiple switches.
  3. 3What are the two methods to assign a port to a VLAN?The two methods to assign a port to a VLAN are as follows:
    - Statically: Statically assigning a port to a VLAN is a manual process performed by the administrator.
    - Dynamically: Assigning VLANs dynamically is done using a VLAN Membership Policy Server (VMPS). The VMPS contains a database that maps MAC addresses to VLAN membership. A dynamic port can belong to only one VLAN at a time. A Catalyst 4500 or 6500 switch can be configured to be a VMPS, but a Catalyst 2960 switch cannot.
  4. 4What VLAN ranges does the Catalyst 2960 support?Normal-range and extended-range VLANs.
    VLANs are identified by a number from 1 to 4094. VLANs 1 to 1005 are considered normal-range VLANs. Extended-range VLANs are numbered 1006 to 4094.
  5. 5How many VLANs does a Catalyst 2960 switch support?Up to 255 VLANs.
  6. 6What are the four VLAN port membership modes on a Catalyst 2960 switch?The four VLAN port membership modes on a Catalyst 2960 switch are as follows:
    - Static-access: Static-access ports belong to only one VLAN and are manually assigned.
    - Trunk (IEEE 802.1Q): By default, a trunk port is a member of all VLANs.
    - Dynamic-access: Dynamic-access ports belong to one VLAN and are dynamically assigned by a VMPS. Dynamic-access ports must not connect to another switch.
    - Voice VLAN: Voice VLAN ports are access ports attached to an IP phone that are configured to use one VLAN for voice traffic and another VLAN for data traffic from a device connected to the IP phone.
  7. 7What are trunk links?Trunk links allow the switch to carry multiple VLANs across a single link.
    By default, each port on a switch can belong to only one VLAN. For devices that are in a VLAN (that spans multiple switches) to talk to other devices in the same VLAN, you must use trunking or have a dedicated port for each VLAN.
    Trunk links encapsulate frames using a Layer 2 protocol. This encapsulation contains information for a switch to distinguish traffic from different VLANs and to deliver frames to the proper VLANs. The Catalyst 2960 supports 802.1Q as its trunking protocol.
  8. 8Describe 802.1Q tagging?IEEE 802.1Q tagging provides a standard method of identifying frames that belong to a particular VLAN. 802.1Q does this by using an internal process that modifies the existing Ethernet frame with the VLAN identification.
  9. 9In 802.1Q, what is the native VLAN?The native VLAN is VLAN1 by default. 802.1Q does not tag the native VLAN across trunk links.
  10. 10What is VTP?VLAN Trunking Protocol (VTP) is a Layer 2 messaging protocol that maintains VLAN configuration consistency throughout a common administrative domain by managing VLAN additions, deletions, and name changes across multiple switches. Without VTP, you would have to manually add VLAN information to each switch in the network.
  11. 11What is a VTP domain?Also called a VLAN management domain, a VTP domain is one or more interconnected switches that share the same VTP environment. A switch can be in only one VTP domain, and all VLAN information is propagated to all switches in the same VTP domain.
  12. 12What are the three VTP modes a switch can be in?A switch can be in the following three VTP modes:
    - Server
    - Client
    - Transparent
  13. 13What is VTP server mode?A switch in VTP server mode can add, delete, and modify VLANs and other configuration parameters for the entire VTP domain. It is the default mode for all Catalyst switches. VLAN configurations are saved in NVRAM. When you change VLAN configuration in server mode, the change is dynamically propagated to all switches in the VTP domain.
  14. 14What is VTP client mode?In VTP client mode, a switch cannot create, delete, or modify VLANs. In client mode, the switch transmits and receives VTP updates on its trunk links. VLAN configurations are received from the VTP server.
  15. 15What is VTP transparent mode?In transparent mode, a switch does not participate in the VTP domain. However, a switch can add, modify, and delete VLANs locally. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. In VTP version 2, transparent switches forward VTP advertisements they receive out their trunk ports.

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ICND 2 Studies Fichas sobre VLANS, creado por troussel el 05/08/2013.
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troussel
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