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Zorluk: KolayRouting Table Components

In a Cisco IOS IPv4 routing table displayed via the `show ip route` command, prefix source codes identify how routes were populated. Match each routing table source code on the left with its corresponding route origin and default administrative distance on the right.

  • Source Code CDirectly connected network (Default AD: 0)
  • Source Code SStatically configured route (Default AD: 1)
  • Source Code OOSPF dynamic routing protocol (Default AD: 110)
  • Source Code DEIGRP dynamic routing protocol (Default AD: 90)

Cevap

Source Code C matches Directly connected network (Default AD: 0); Source Code S matches Statically configured route (Default AD: 1); Source Code O matches OSPF dynamic routing protocol (Default AD: 110); Source Code D matches EIGRP dynamic routing protocol (Default AD: 90).
Each routing table code corresponds strictly to a routing source and its trust rating (administrative distance). Code C represents connected interfaces (AD 0), code S represents static routes (AD 1), code O represents OSPF routes (AD 110), and code D represents internal EIGRP routes (AD 90).

Adım Adım Çözüm

1
Identify the meaning of source code C in Cisco IOS routing output.
Code C stands for Connected networks, assigned an Administrative Distance of 0.
Directly connected interfaces are the most trusted route source.
2
Identify the meaning of source code S in Cisco IOS routing output.
Code S stands for Static routes, assigned a default Administrative Distance of 1.
Static routes are manually created by network administrators.
3
Identify the meaning of source code O in Cisco IOS routing output.
Code O stands for Open Shortest Path First (OSPF), assigned a default Administrative Distance of 110.
Cisco IOS assigns OSPF an AD of 110.
4
Identify the meaning of source code D in Cisco IOS routing output.
Code D stands for EIGRP (derived from the Diffusing Update Algorithm - DUAL), assigned a default internal Administrative Distance of 90.
Letter D is used for EIGRP because E uses Exterior Gateway Protocol in older routing tables.

Anahtar Kavram

Routing Table Source Codes and Administrative Distance
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Konular

Routing Table Components

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