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Zorluk: OrtaRouting Concepts and Dynamic Routing Protocols

A network administrator is designing a dynamic routing strategy for an enterprise infrastructure that uses both OSPF and EIGRP. Which of the following statements regarding routing metrics, administrative distance, and protocol operations are correct? (Select TWO)

  1. OSPF calculates path cost based on link bandwidth, whereas EIGRP uses a composite metric derived primarily from bandwidth and delay by default.Cevap
  2. If a router receives updates for the exact same destination network prefix from both internal EIGRP and OSPF, it will prefer the internal EIGRP route due to its lower administrative distance.Cevap
  3. C
    OSPF routers determine the optimal route to remote networks by analyzing Layer 2 frame headers exchanged between neighbor switch ports.
  4. D
    Dynamic routing protocols perform Port Address Translation (PAT) to enable multiple internal private hosts to share a single public IP address when traversing WAN links.

Cevap

The correct statements are that OSPF calculates cost using link bandwidth while EIGRP uses a composite metric of bandwidth and delay, and that a router prefers internal EIGRP over OSPF for identical destination prefixes due to EIGRP's lower administrative distance.
OSPF determines path selection using a metric based on link bandwidth, while EIGRP uses a composite metric derived from bandwidth and delay by default. Additionally, when a router receives routes for the exact same network prefix from multiple dynamic protocols, it chooses the route with the lowest Administrative Distance (AD). Internal EIGRP (AD 90) is preferred over OSPF (AD 110).

Adım Adım Çözüm

1
Evaluate metric calculation mechanisms for OSPF and EIGRP.
OSPF uses cost derived from interface bandwidth, whereas EIGRP uses a composite metric equation (defaulting to minimum bandwidth and cumulative delay).
Different dynamic routing protocols use distinct metrics to quantify path desirability.
2
Compare administrative distances for route selection between distinct dynamic protocols.
Internal EIGRP has a default Administrative Distance (AD) of 90, while OSPF has a default AD of 110.
When multiple routing sources offer paths to the exact same prefix, administrative distance determines which route is installed into the routing table, preferring lower values.
3
Distinguish Layer 3 routing operations from Layer 2 framing and address translation services.
OSPF operates at Layer 3 using LSAs, while PAT is a translation mechanism rather than a dynamic routing feature.
Ensures strict separation of networking concepts across OSI layers and administrative services.

Anahtar Kavram

Dynamic Routing Protocol Operations, Metrics, and Administrative Distance
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Konular

Routing Concepts and Dynamic Routing Protocols

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