Marcos Avila
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NSE4 6.0 NSE4 6.0 Test sobre Routing I, creado por Marcos Avila el 05/07/2018.

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Marcos Avila
Creado por Marcos Avila hace alrededor de 6 años
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Routing I

Pregunta 1 de 16

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is how FortiGate in NAT mode decides where to send the packets that it receives and the packets that it generates. All network devices that perform routing have a routing table. A routing table contains a series of rules. Each rule specifies the next hop, which may or may not be the final destination of the packet. Each routing hop in the routed path requires a routing table lookup to pass the packet along until it reaches the final destination.

When routing packets, FortiGate will first find a matching route in its list of routes based on the packet's destination address. When performing this match, FortiGate evaluates the entire routing table to find the most specific match before selecting a route. If FortiGate finds multiple matches, it uses various route attributes to determine the best route. Proper routing configuration is important. If routes are misconfigured, packets will not reach their destination and will be lost.

Selecciona una de las siguientes respuestas posibles:

  • IP-Layer Routing

  • IP-Subnet Routing

  • IP-Routing Layer

Explicación

Pregunta 2 de 16

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For each session, FortiGate performs two routing lookups:

Selecciona una de las siguientes respuestas posibles:

  • For the first packet sent by the originator
    For the first reply packet coming from the responder.

  • For the first route sent by the originator
    For the first reply session coming from the responder.

Explicación

Pregunta 3 de 16

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FortiGate writes the routing information to its session table. Subsequent packets are routed according to the session table, not the routing table.

So, all packets that belong to the same session follow the same path, even after a change in the static routes.

However, there is an exception to this rule: if there is a change in the routing table, FortiGate removes the route information for the session table, and then it makes additional routing table lookups to rebuild this information.

Selecciona una de las siguientes respuestas posibles:

  • Route Lookup

  • IP-Layer Routing

  • Routing

Explicación

Pregunta 4 de 16

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Routing information is written to the session table

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 5 de 16

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Dynamic routes: Fortigate Supports (select 4)

Selecciona una o más de las siguientes respuestas posibles:

  • Routing information protocol (RIP)

  • Open Shortest Path First (OSPF)

  • Border Gateway Protocol (BGP)

  • Intermediate System to Intermediate System (IS-IS)

  • Enhanced Interior Gateway Routing Protocol (EIGRP)

Explicación

Pregunta 6 de 16

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Policy routes are in the same routing table by Fortigate, and have precedence over the regular routing table.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 7 de 16

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ISDB

Selecciona una de las siguientes respuestas posibles:

  • Internet Service Database

  • Internet System Database

Explicación

Pregunta 8 de 16

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Which configured routes aren‘t displayed in the routing table monitor?

Selecciona una de las siguientes respuestas posibles:

  • Inactive routes

    If an interface is down, or FortiGate does not have layer 2 connectivity to a subnet, that route is considered inactive, and will not be added to the routing table.

    Policy routes are viewed in a separate table. ISDB routes are also added as policy routes in the policy route monitor.

  • Directly connected subnets

    When a subnet is assigned to FortiGate's interface, a route to the subnet is automatically added with Connected shown in the Type column. There has to be layer 2 connectivity to the subnets for their respective routes to be added to the routing table. This means that if an interface is down, or there is no link established, the route will not be added.

    Dynamic routes

    On larger networks, your FortiGate may receive routes from other routers, through protocols such as BGP or OSPF. FortiGate will add these routes to the routing table with the respective routing protocol's name under the Type column.

Explicación

Pregunta 9 de 16

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Each route in the routing table has the following attributes: (Select 6)

Selecciona una o más de las siguientes respuestas posibles:

  • Network

  • Gateway IP

  • Interfaces

  • DIstance

  • Metric

  • Priority

  • Policy id

  • Routing protocol

Explicación

Pregunta 10 de 16

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- directly connected
- DHCP gateway
- external BGP (EBGP) routes
- internal BGP (IBGP) routes
- OSPF routes
- RIP routes
- static routes

Arrastra y suelta para completar el texto.

    0
    5
    20
    200
    110
    120
    10

Explicación

Pregunta 11 de 16

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If multiple dynamic routes have the same distance, then metric is used to break the tie. The route with the lowest metric is chosen.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 12 de 16

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Used by static routes to dermine the best route to a destination, when the distance is the same.

Selecciona una de las siguientes respuestas posibles:

  • Priority

  • Distance

Explicación

Pregunta 13 de 16

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Priority route attibutes does not appear on the GUI routing monitor

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 14 de 16

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If multiple routes to the same destination share the same distance, metric, and priority, they are all considered the best candidate. If the routes are static, OSPF, or EGP, FortiGate load balances the traffic across all routes.

Selecciona una de las siguientes respuestas posibles:

  • This is called equal cost multi-path (ECMP).

  • This is called Policy route

Explicación

Pregunta 15 de 16

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ECMP

Selecciona una de las siguientes respuestas posibles:

  • Equal cost multi-path

  • Equal cost multi-port

Explicación

Pregunta 16 de 16

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ECMP Methods (Select 4)

Selecciona una o más de las siguientes respuestas posibles:

  • Source IP

  • Source-destination IP

  • Weighted

  • Usage (Spillover)

  • Per IP

  • Source Network

Explicación

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