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200-301 · Question #1424

Refer to the exhibit. A packet sourced from 172.18.33.2 is destined for 172.18.32.38. Where does the router forward the packet?

The correct answer is D. GigabitEthernet0/0. The router forwards the packet to GigabitEthernet0/0 because the destination IP 172.18.32.38 matches a route whose outgoing interface is GigabitEthernet0/0.

Submitted by ashley.k· Mar 5, 2026IP Connectivity

Question

Refer to the exhibit. A packet sourced from 172.18.33.2 is destined for 172.18.32.38. Where does the router forward the packet?

Options

  • A10.1.1.1
  • B10.1.1.3
  • CLoopback0
  • DGigabitEthernet0/0

How the community answered

(37 responses)
  • A
    11% (4)
  • B
    3% (1)
  • C
    8% (3)
  • D
    78% (29)

Why each option

The router forwards the packet to GigabitEthernet0/0 because the destination IP 172.18.32.38 matches a route whose outgoing interface is GigabitEthernet0/0.

A10.1.1.1

10.1.1.1 is likely an IP address on an interface or a next-hop address, not a direct outgoing interface for the destination network.

B10.1.1.3

10.1.1.3 is also likely an IP address on an interface or a next-hop address for a different network, not the direct outgoing interface.

CLoopback0

Loopback0 is a logical interface used for router management or peering, not typically for forwarding user data packets to external destinations.

DGigabitEthernet0/0Correct

Based on standard routing principles, the router would perform a lookup in its routing table for the destination IP address 172.18.32.38 and select the route with the longest prefix match that points to GigabitEthernet0/0 as the egress interface for that destination network.

Concept tested: Router packet forwarding (routing table lookup)

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_fwd/configuration/xe-16/irp-xe-16-book/irp-ip-routing-intro.html

Topics

#IP routing#Routing table lookup#Packet forwarding#Next-hop resolution

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