Assume the linksys and cisco servers are both assigned static IP addresses (192.168.0.1 & 192.168.0.249). Furthermore, assume the DHCP server has been granted the largest, contiguous block of available IP addresses in the subnet range to give out as dynamic IP addresses.

Question

Mathematically speaking, what is the last possible IP address in the DHCP server's pool for addresses?

What CIDR address is equivalent to the netmask for this subnetwork? Use the client IP address to calculate/format your answer.

Assume a client computer on this subnetwork wishes to send a message to another computer with the IP address 141.165.100.211. What IP address on the subnetwork would receive the message for routing out of the subnetwork?

Question 5 options:

Answer 1

To answer these questions, let's analyze the information given about the network:

1. Static IP Addresses:

   • Linksys: 192.168.0.1
   • Cisco: 192.168.0.249

2. Subnet Information:

   • The subnet in question seems to be using typical private addressing, specifically within the 192.168.0.0/24 range.
   • This gives us the network range from 192.168.0.0 to 192.168.0.255.

3. DHCP Server Address Pool:

   • Since the DHCP server is giving out dynamic addresses, we need to exclude the static addresses from the subnet range in order to identify the available pool.
   • The range of IP addresses available for DHCP would begin just after the lowest static IP and end just before the highest static IP.
   • The lowest static IP address is 192.168.0.1.
   • The highest static IP address is 192.168.0.249.

Given this, the DHCP server can allocate IP addresses starting from 192.168.0.2 to 192.168.0.248.

Last Possible IP Address in the DHCP Pool

The last possible IP address for DHCP is:

• 192.168.0.248 (just before the static IP 192.168.0.249)

CIDR Address Representation

To determine the CIDR notation, we look at the subnet mask for this addressing scheme:

• Since we established that we are in the 192.168.0.0/24 network, the subnet mask is 255.255.255.0, which corresponds to the CIDR notation of /24.

Routing Message to Outside IP Address

Now, regarding the routing of a message from a client computer on this network (e.g., 192.168.0.x) toward an external IP address (141.165.100.211):

• Computers on the subnet (192.168.0.x) will not be able to route to external addresses directly. Instead, the routing is generally handled through the network gateway (typically the router).
• In this scenario, the routing would typically go through the lowest or highest static IP set up to function as the default gateway. In most residential or small business networks, this is the first IP address (often the router).

Given our previous static IPs:

• The router is commonly set to the lowest address in the range, which would be 192.168.0.1.

Summary of Answers

1. Last Possible IP Address in the DHCP Pool: 192.168.0.248
2. CIDR Address Equivalent: /24
3. Gateway IP Address for External Communication: 192.168.0.1