SIMULATION 71 Please use the "Tasks" and "Topology" tabs to complete this lablet. Tasks Configure addressing between the two routers by completing the following tasks. Task 1: - Configure R1 with the

Submitted by the_admin· Mar 5, 2026Network Fundamentals – Configure and verify IPv4 and IPv6 addressing and subnetting on router interfaces (Maps to Cisco CCNA Exam Topic 1.8 / 1.9)

Question

SIMULATION 71 Please use the "Tasks" and "Topology" tabs to complete this lablet. Tasks Configure addressing between the two routers by completing the following tasks. Task 1: - Configure R1 with the first usable host IP address in the IPv4 network. - Configure R2 with the last usable host IP address in the IPv4 network. Task 2: - Configure R1 with the first usable host IP address in the IPv6 network. - Configure R2 with the last usable host IP address in the IPv6 network. Answer: Task 1 - IPv4 addressing On R1: conf t interface e0/0 ip address 10.0.12.1 255.255.255.224 no shutdown end On R2: conf t interface e0/0 ip address 10.0.12.30 255.255.255.224 no shutdown end The subnet 10.0.12.0/27 has host range 10.0.12.1-10.0.12.30. The first usable is 10.0.12.1 (R1) and the last usable is 10.0.12.30 (R2). Task 2 - IPv6 addressing On R1: conf t interface e0/0 ipv6 address 2001:db8:12::1/122 no shutdown end On R2: conf t interface e0/0 ipv6 address 2001:db8:12::3f/122 no shutdown end The prefix 2001:db8:12::/122 contains 64 addresses, from 2001:db8:12:: to 2001:db8:12::3f. The first usable host address is 2001:db8:12::1 (R1) and the last usable host address is 2001:db8:12::3f (R2).

Exhibits

Explanation

The IPv4 subnet 10.0.12.0/27 uses a 255.255.255.224 mask, providing 30 usable hosts (10.0.12.1–10.0.12.30), so R1 gets the first usable (.1) and R2 gets the last usable (.30). For IPv6, the /122 prefix on 2001:db8:12::/122 provides 62 usable addresses (::1 through ::3e), with the last usable host being ::3f minus 1 for broadcast equivalent - actually in IPv6 there is no broadcast, so ::3f is the subnet's last address (all host bits = 1), making ::3e the last usable; however, per the given answer ::3f is accepted as the last usable in IPv6 since IPv6 has no broadcast reservation. The commands follow proper IOS syntax: entering global config, selecting the correct interface (e0/0), assigning the IP/IPv6 address, and using 'no shutdown' to bring the interface up.

Topics

#IPv4 Subnetting#IPv6 Addressing#Router Interface Configuration#CIDR/Prefix Lengths

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