Quiz
Routing I
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Fragen in diesem Quiz (16)
1is 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.- AIP-Layer Routing
- BIP-Subnet Routing
- CIP-Routing Layer
2For each session, FortiGate performs two routing lookups:
- AFor the first packet sent by the originator
For the first reply packet coming from the responder. - BFor the first route sent by the originator
For the first reply session coming from the responder.
- AFor the first packet sent by the originator
3FortiGate 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.- ARoute Lookup
- BIP-Layer Routing
- CRouting
4Routing information is written to the session table
- ARichtig
- BFalsch
5Dynamic routes: Fortigate Supports (select 4)
- ARouting information protocol (RIP)
- BOpen Shortest Path First (OSPF)
- CBorder Gateway Protocol (BGP)
- DIntermediate System to Intermediate System (IS-IS)
- EEnhanced Interior Gateway Routing Protocol (EIGRP)
6Policy routes are in the same routing table by Fortigate, and have precedence over the regular routing table.
- ARichtig
- BFalsch
7ISDB
- AInternet Service Database
- BInternet System Database
8Which configured routes aren‘t displayed in the routing table monitor?
- AInactive 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. - BDirectly 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.
- AInactive routes
9Each route in the routing table has the following attributes: (Select 6)
- ANetwork
- BGateway IP
- CInterfaces
- DDIstance
- EMetric
- FPriority
- GPort
- HSubnet
10[blank_start]0[blank_end] - directly connected
[blank_start]5[blank_end] - DHCP gateway
[blank_start]20[blank_end] - external BGP (EBGP) routes
[blank_start]200[blank_end] - internal BGP (IBGP) routes
[blank_start]110[blank_end] - OSPF routes
[blank_start]120[blank_end] - RIP routes
[blank_start]10[blank_end] - static routes- A0
- B5
- C20
- D200
- E110
- F120
- G10
11If multiple dynamic routes have the same distance, then metric is used to break the tie. The route with the lowest metric is chosen.
- ARichtig
- BFalsch
12Used by static routes to dermine the best route to a destination, when the distance is the same.
- APriority
- BDistance
13Priority route attibutes does not appear on the GUI routing monitor
- ARichtig
- BFalsch
14If 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.
- AThis is called equal cost multi-path (ECMP).
- BThis is called Policy route
15ECMP
- AEqual cost multi-path
- BEqual cost multi-port
16ECMP Methods (Select 4)
- ASource IP
- BSource-destination IP
- CWeighted
- DUsage (Spillover)
- EPer IP
- FSource Network
Informationen
- Beschreibung
- Der Nutzer hat seine Fachbereichs-Information gelöscht. Quiz am Routing I, erstellt von Gelöschter Nutzer am 11/04/2019.
- Autor
- Gelöschter Nutzer
- Sprache
- English
- Aufrufe
- 30
- Verlauf
- Erstellt am 11 Apr 2019 · aktualisiert am 11 Apr 2019
- Schlagwörter