Lab Simulation 55 Please use the "Tasks" and "Topology" tabs to complete this lablet. Topology Tasks Connectivity between the devices has been established. IP services must be configured to complete t

Submitted by haruto_sh· Mar 5, 2026Infrastructure Services - Configure and verify IP services including NAT, NTP, DHCP, and device management security (maps to Cisco CCNA/CCNP exam domain covering IP Services and Network Management)

Question

Lab Simulation 55 Please use the "Tasks" and "Topology" tabs to complete this lablet. Topology Tasks Connectivity between the devices has been established. IP services must be configured to complete the implementation. Router R2 has a partial configuration for NAT and DHCP. Task 1 Router R2 is configured for Port Address Translation (PAT) using 10.0.122.2 (private IP) and 209.165.201.6 (public IP). - Define the inside and outside interfaces. Task 2 Set router R2 to use its clock as a time source and use Stratum 3. - The ntp broadcast client and ntp multicast client commands must not be used. - Peering should not be allowed on R2. Task 3 Complete the DHCP configuration. - Configure Sw1 to forward DHCP requests from clients in VLAN 220 to the DHCP server on R2. - Ensure DHCP omits addresses between 10.220.10.225 and 10.220.10.255. - Verify the R3 router receives an IP address from the DHCP server. Task 4 Remove SSH configuration parameters from R2. - Remove SSH Version 2. - Remove SSH access for remote connections. Answer: See the below explanation

Exhibits

Explanation

This simulation requires configuring multiple IP services on Router R2: defining NAT inside/outside interfaces (e0/1 as inside facing the private network and e0/0 as outside facing the public network), setting R2 as an authoritative NTP master with 'ntp master 3' (which uses R2's own clock without relying on external sources or broadcast/multicast), completing DHCP by configuring an IP helper-address on Sw1's VLAN 220 interface pointing to R2, adding an exclusion range for 10.220.10.225-10.220.10.255, and removing SSH version 2 and SSH access-class configurations from R2. The steps outlined in the correct answer align precisely with Cisco IOS commands that satisfy each task's requirements - 'ntp master 3' is the correct command to make a router its own NTP time source at a specified stratum without using broadcast/multicast client modes or peering.

Topics

#NAT/PAT#NTP Configuration#DHCP Relay and Pool#SSH Hardening

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