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200-301 · Question #1406

Refer to the exhibit. Which IP route command created the best path for a packet destined for 10.10.10.3?

The correct answer is B. ip route 10.10.10.0 255.255.255.240 g0/0. The best path for a packet is determined by the most specific route, which is identified by the longest prefix match in the routing table.

Submitted by stefanr· Mar 5, 2026IP Connectivity

Question

Refer to the exhibit. Which IP route command created the best path for a packet destined for 10.10.10.3?

Exhibits

200-301 question #1406 exhibit 1
200-301 question #1406 exhibit 2

Options

  • Aip route 10.10.0.0 255.255.252.0 g0/0
  • Bip route 10.10.10.0 255.255.255.240 g0/0
  • Cip route 10.0.0.0 255.0.0.0 g0/0
  • Dip route 10.10.10.1 255.255.255.255 g0/0

How the community answered

(26 responses)
  • A
    4% (1)
  • B
    81% (21)
  • C
    12% (3)
  • D
    4% (1)

Why each option

The best path for a packet is determined by the most specific route, which is identified by the longest prefix match in the routing table.

Aip route 10.10.0.0 255.255.252.0 g0/0

This route uses a /22 prefix (10.10.0.0/22), which is less specific than the /28 prefix in option B, making it a less preferred route for 10.10.10.3.

Bip route 10.10.10.0 255.255.255.240 g0/0Correct

The ip route 10.10.10.0 255.255.255.240 g0/0 command creates a route with a /28 prefix (10.10.10.0/28), which is the most specific subnet that includes the destination IP address 10.10.10.3 among the given options, thus making it the best path.

Cip route 10.0.0.0 255.0.0.0 g0/0

This route uses a /8 prefix (10.0.0.0/8), which is the least specific of the options that match 10.10.10.3, and therefore not the best path.

Dip route 10.10.10.1 255.255.255.255 g0/0

This route defines a host route for 10.10.10.1 (/32) and does not match the destination IP address 10.10.10.3.

Concept tested: Longest prefix match routing

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_static/configuration/xe-3s/irs-xe-3s-book/irs-static-rt-cg-xe.html

Topics

#Cisco IP routing#Longest prefix match#Static routes

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