200-301: Cisco Certified Network AssociateDemo

Question

Refer to the exhibit.

The router has been configured with a supernet to meet the requirement for 380 users on a subnet. The requirement already includes 30% future growth.

Which configuration correctly verifies the IP subnet on router R4?

Question Image

A Subnet: 10.7.54.0 Subnet mask: 255.255.128.0 Broadcast address: 10.5.55.255 Usable IP address range: 10.7.54.1 ג€" 10.7.55.254
B Subnet: 10.7.54.0 Subnet mask: 255.255.255.0 Broadcast address: 10.7.54.255 Usable IP address range: 10.7.54.1 ג€" 10.7.55.254
C Subnet: 10.7.54.0 Subnet mask: 255.255.254.0 Broadcast address: 10.7.54.255 Usable IP address range: 10.7.54.1 ג€" 10.7.55.254
D Subnet: 10.7.54.0 Subnet mask: 255.255.254.0 Broadcast address: 10.7.55.255 Usable IP address range: 10.7.54.1 ג€" 10.7.55.254

Explanation

A subnet for 380 users needs at least 380 usable host addresses. The smallest subnet that satisfies that is a /23, which uses mask 255.255.254.0 and provides 510 usable addresses. For subnet 10.7.54.0/23, the network spans 10.7.54.0 to 10.7.55.255, so the broadcast address is 10.7.55.255 and the valid host range is 10.7.54.1 through 10.7.55.254.

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200-301: Cisco Certified Network AssociateDemo

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