Task 1 & 2:

1. Configure Router as a DHCP server for the networks 192.168.1.0/24 and 192.168.2.0 .24 using pools named OFFICE1 and OFFICE2 respectively.

2. Configure Router as the default-gateway and DNS server in each pool.

Router#configure terminal
Router(config)#ip dhcp pool OFFICE1
Router(dhcp-config)#network 192.168.1.0 255.255.255.0
Router(dhcp-config)#default-router 192.168.1.1
Router(dhcp-config)#dns-server 192.168.1.1
Router(dhcp-config)#exit

Router(config)#ip dhcp pool OFFICE2
Router(dhcp-config)#network 192.168.2.0 255.255.255.0
Router(dhcp-config)#default-router 192.168.2.1
Router(dhcp-config)#dns-server 192.168.2.1
Router(dhcp-config)#exit

ip dhcp pool creates a pool of IP addresses for devices in the network.

network defines the subnet to assign IPs from.

default-router sets the router as default gateway in each network.

dns-server specifies the router as DNS server for the clients in each network.

Task 3: Exclude First Address in each network.

Router(config)#ip dhcp excluded-address 192.168.1.1
Router(config)#ip dhcp excluded-address 192.168.2.1

This command reserves addresses that won't be assigned by DHCP. This is necessary as these addresses are assigned to the Router interfaces in each network so they shouldn't be assigned to other devices.

Task 4: Configure PCs to obtain their IP addresses dynamically via DHCP. PC1 and PC2 must be issued the IP address of 192.168.1.2 and 192.168.2.2 respectively.

Both PCs should have a link-local address configured by default. We need to renew the IP configuration.

PC1:\>ipconfig /renew

IP Address.................: 192.168.1.2

Subnet Mask................: 255.255.255.0

Default Gateway............: 192.168.1.1

DNS Server.................: 192.168.1.1

PC2:\>ipconfig /renew

IP Address.................: 192.168.2.2

Subnet Mask................: 255.255.255.0

Default Gateway............: 192.168.2.1

DNS Server.................: 192.168.2.1

This command is used on a PC to request a new IP address from a DHCP server. It forces the client to release its current IP address (if any) and renew it by communicating with the DHCP server. The new IP address and related network configuration details (subnet mask, default gateway, DNS server) are obtained and applied to the system.

Now exit configuration mode and save the configuration.

Router(config)#end
Router#write memory