VTP PREGUNTAS

UNIVERSIDAD TECNOLÓGICA DE NEZAHUALCÓYOTL

Organismo Público Descentralizado del Gobierno del Estado de México

DIVISIÓN DE TELEMÁTICA

REDES VIRTUALES

EXAMEN

Grupo: ITIC911V Cuatrimestre: Decimo

Fecha: 27/Sep/2013

INTEGRANTES:

EMMANUEL ZÚÑIGA BRISEÑO

JOSE MANUEL JUAREZ MOJICA

DANIEL ALEJANDRO HERNANDEZ HERRERA

JAVIER SOSA RAMIREZ

ALVARO YAIR MARTINEZ HERNANDEZ

1

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Redes VLAN

VLANS AND TRUNKING

"Do I Know This Already?"

quiz (basis)

• Where is the VLAN created and stored?

Se almacenan en un archive llamado vlan.data y se guardan la memoria flash.

quiz

1. What are two types of VLANs, in terms of spanning areas of the campus network?

Vlan de reango extendido y Vlan de rango normal

2. What are the components of a Token Ring VLAN?

• Los que se limita a un solo anillo

• Aquellos que atraviesan el dominio bridged

Un TrCRF es una agrupación lógica de puertos. Dentro del TrCRF, conmutación fuente de ruta se utiliza para la transmisión de base a cualquiera de las direcciones MAC o descriptores de ruta. Los marcos pueden ser conmutados entre puertos de un mismo TrCRF.

Un TrBRF es una agrupación lógica de TrCRFs. El TrBRF se utiliza para unir diferentes TrCRFs contenidas dentro de un solo Switxh catalyst 3900, una pila de switch catalyst 3900S o los módulos de Token Ring de un único conmutador Catalyst 5000. Además, la TrBRF se puede extender a través de una red de conmutadores a través de enlaces ascendentes de alta velocidad entre los interruptores para unirse a TrCRFs contenidas en conmutadores diferentes.

3. What is the purpose of Dynamic Trunking Protocol (DTP)?

Es un protocolo propietario creado por Cisco Systems que opera entre switches Cisco, el cual automatiza la configuración de trunking (etiquetado de tramas de diferentes VLAN's con ISL o 802.1Q) en enlaces Ethernet.

Dicho protocolo puede establecer los puertos ethernet en cinco modos diferentes de trabajo: AUTO, ON, OFF, DESIRABLE y NON-NEGOTIATE.

4. What VTP modes can a Catalyst switch be configured for?

Modo servidor, cliente y servidor

5. Can VLANs be created in each of the modes?

Solo en el modo servidor

quiz part two

1. What is the purpose of VTP pruning?

VTP Pruning se encarga de “recortar/prune” el trafico innecesario que se inunda a traves de una red conmutada (broadcast, multicast, inundación de unicast y desconocido, recorta TODO)

Mejora el ancho de banda al restringir el tráfico a los trunks que corresponden para alcanzar un dispositivo al otro lado de la red.

Por defecto, VTP pruning viene deshabilitado.

2. Which VLAN numbers are never eligible for VTP pruning? Why?

L aVlan1 ya que no puede recortar trafico

To configure static VLANs on an IOS-based switch,

would you enter the following commands in enable mode?

Switch# vlan database

Switch(vlan)# vlan 5 name guest

Switch(vlan)# exit

Switch# configure terminal

Switch(config)# interface gi0/0/0

Switch(config-if)# switchport mode access

Switch(config-if)# switchport access vlan 5

Switch(config-if)# end

Answer Verdadero

The VID can have values from 0 to 4095, but VLAN 0, 1, and 4095 are

reserved.

09/07/2013

3

ISL

• The Inter-Switch Link (ISL) protocol is a Cisco

Proprietary (Falso)

• ISL is primarily used for Ethernet media. (Falso)

• Cisco , although, has included provisions to carry Token Ring, FDDI, and ATM frames over Ethernet ISL. (A frame-type field in the ISL header indicates the source frame type.)(Verdadero)

• When a frame is destined out a trunk link to another switch or router, ISL adds a 26-byte header and a 4-byte trailer to the frame. The source VLAN is identified with a 10-bit VLAN ID in the header.(Verdadero)

Responda Falso o Verdadero

IEEE 802.1Q Protocol

• Can also be used to preserve VLAN associations over trunk links.(verdadero)

• However, this frame identification method is standardized, allowing VLAN trunks to existand operate between equipment from multiple vendors.(Verdadero)

Responda Falso o Verdadero

IEEE 802.1Q Frame Tagging Standard

• The first two bytes are used as a Tag Protocol Identifier (TPID).(falso )

• The first two bytes also always have a value of 0x8100 to signify an 802.1Q tag.(Verdadero)

• The remaining two bytes are used as a Tag Control Information (TCI) field.(Falso)

• The TCI information contains a 3-bit priority field, which is used to implement class of

service functions in the accompanying 802.1Q/802.1p prioritization standard.(Falso)

• One bit of the TCI is a Canonical Format Indicator (CFI), flagging whether the MAC addresses are in canonical format. (Falso)

• The last 12 bits are used as a VLAN Identifier (VID) to indicate the source VLAN for the

frame.(Verdadero)

Responda Falso o Verdadero

09/07/2013

4

LAN Emulation (LANE)

• Trunking VLANs between switches over an Asynchronous Transfer Mode (ATM) link is possible.(Verdadero)

• VLANs are transported using the IEEE LAN Emulation (LANE) standard. (Falso)

VTP VLAN TRUNK PROTOCOL

VTP, VLAN Trunk Protocol

1. Reduces administration in a switched network.(Verdadero)

2. A new VLAN configured on one VTP server is distributed through all switches in the domain. (Verdadero)

3. It is a Cisco−proprietary protocol(Verdadero)

4. IT is available on most of the Cisco Catalyst series products. (Verdadero)

Responda Falso o Verdadero

09/07/2013

5

1. VTP packets are sent in either Inter−Switch Link (ISL) frames or in IEEE 802.1Q (dot1q) frames. (Verdadero)

2. VTP packets are sent to the destination MAC address 01−00−0C−CC−CC−CC with a logical link control (LLC) code of Subnetwork Access Protocol (SNAP) (AAAA) and a type of 2003 (in the SNAP header). (Verdadero)

Responda Falso o Verdadero

1. If you have a VTP packet inside 802.1Q frames, the ISL header and cyclic redundancy check (CRC) is replaced by dot1q tagging?

...