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Zorluk: KolayIPv4 Static Routing

A network administrator is configuring IPv4 static routes on a Cisco router to connect a branch site. Which two statements accurately describe the operational characteristics of static routing syntax and forwarding decisions on Cisco routers? (Select two.)

  1. Specifying a next-hop IPv4 address requires the router to perform a recursive lookup to determine the egress interface.Cevap
  2. Specifying an exit interface directly on a point-to-point link allows the router to forward traffic without a recursive lookup.Cevap
  3. C
    Configuring a static route with a next-hop IPv4 address automatically assigns an administrative distance of 90 instead of 1.
  4. D
    Configuring an exit interface instead of a next-hop IPv4 address requires entering the subnet mask as an IPv4 wildcard mask.

Cevap

The statement explaining that specifying a next-hop IPv4 address requires a recursive lookup, and the statement explaining that specifying an exit interface on a point-to-point link avoids a recursive lookup.
The correct statements reflect standard Cisco IOS forwarding logic: specifying a next-hop IP address forces a recursive routing table lookup to identify the egress interface, whereas specifying a directly connected exit interface on a point-to-point link allows immediate interface mapping without recursive lookup.

Adım Adım Çözüm

1
Analyze static route next-hop lookup behavior.
When a static route uses a next-hop IPv4 address, the router must search its routing table a second time (recursive lookup) to find which outgoing interface reaches that next-hop address.
Next-hop resolution determines physical layer 2 and egress interface mapping.
2
Analyze static route exit interface lookup behavior on point-to-point links.
When an exit interface is specified directly on a point-to-point connection, the router immediately knows which physical interface to forward the packet out of.
Directly connected point-to-point links do not require recursive next-hop IP resolution.

Anahtar Kavram

IPv4 Static Route Forwarding & Syntax Characteristics
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