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200-301 · Question #608

Refer to the exhibit. An IP subnet must be configured on each router that provides enough addresses for the number of assigned hosts and anticipates no more than 10% growth for now hosts. Which config

The correct answer is C. R7# configure terminal interface Fa1/0 ip address 10.1.56.1 255.255.252.0 no shutdown R8# configure terminal interface Fa0/0 ip address 10.9.32.1 255.255.255.0 no shutdown R9# configure terminal interface Fa1/1 ip address 10.23.96.1 255.255.240.0 no shutdown. Option C is correct because it uses the smallest subnet masks that accommodate the current host counts plus up to 10% growth for each router. For R7, a /22 mask (255.255.252.0) provides 1022 usable hosts - enough for the assigned hosts with growth headroom; for R8, a /24 mask (25

Submitted by ahmad_uae· Mar 5, 2026IP Connectivity / Addressing and Subnetting - selecting appropriate subnet masks to accommodate host requirements with growth planning (CCNA/CCNP Routing and Switching)

Question

Refer to the exhibit. An IP subnet must be configured on each router that provides enough addresses for the number of assigned hosts and anticipates no more than 10% growth for now hosts. Which configuration script must be used? A. B. C. D.

Exhibits

200-301 question #608 exhibit 1
200-301 question #608 exhibit 2
200-301 question #608 exhibit 3
200-301 question #608 exhibit 4
200-301 question #608 exhibit 5
200-301 question #608 exhibit 6
200-301 question #608 exhibit 7
200-301 question #608 exhibit 8
200-301 question #608 exhibit 9
200-301 question #608 exhibit 10

Options

  • AR7# configure terminal interface Fa1/0 ip address 10.1.56.1 255.255.192.0 no shutdown R8# configure terminal interface Fa0/0 ip address 10.9.32.1 255.255.224.0 no shutdown R9# configure terminal interface Fa1/1 ip address 10.23.96.1 255.255.128.0 no shutdown
  • BR7# configure terminal interface Fa1/0 ip address 10.1.56.1 255.255.240.0 no shutdown R8# configure terminal interface Fa0/0 ip address 10.9.32.1 255.255.224.0 no shutdown R9# configure terminal interface Fa1/1 ip address 10.23.96.1 255.255.192.0 no shutdown
  • CR7# configure terminal interface Fa1/0 ip address 10.1.56.1 255.255.252.0 no shutdown R8# configure terminal interface Fa0/0 ip address 10.9.32.1 255.255.255.0 no shutdown R9# configure terminal interface Fa1/1 ip address 10.23.96.1 255.255.240.0 no shutdown

How the community answered

(31 responses)
  • A
    26% (8)
  • B
    19% (6)
  • C
    55% (17)

Explanation

Option C is correct because it uses the smallest subnet masks that accommodate the current host counts plus up to 10% growth for each router. For R7, a /22 mask (255.255.252.0) provides 1022 usable hosts - enough for the assigned hosts with growth headroom; for R8, a /24 mask (255.255.255.0) provides 254 usable hosts - the tightest fit for its smaller host requirement; and for R9, a /20 mask (255.255.240.0) provides 4094 usable hosts - appropriate for its larger host count with growth. Options A and B use overly large subnets for some routers (wasting address space) or undersized subnets that fail the 10% growth requirement. Option A's /18 and /17 masks are far too large and wasteful. Option B's /28 for R7 (255.255.240.0) provides only 4094 hosts but pairs incorrectly with R9's /18, showing mismatched assignments. The key principle is to find the smallest power-of-2 block that satisfies (current hosts × 1.10), then select the subnet mask that matches that block size.

Topics

#IP Subnetting#VLSM#IPv4 Addressing#Network Design

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