An important task of network administration is making decisions about how to set up and partition a network, from the inside. Assuming your network has a public IP, routable over the Internet, you will have to consider how you will go about allocating public network addresses to various hosts. This may include either (or both) of two possibilities:

For this reason, you will need to understand subnetting on the conceptual and mathematical levels -- which is the goal of this homework assignment, in conjunction with the related lab exercise.

For each question below, select the appropriate response and explain your choice.
  1. Computer #1 IP address: 192.168.13.27
    Computer #1 Subnet Mask: 255.255.255.0
    Computer #2 IP address: 192.168.13.96

    Computer #1 pings Computer #2. What is the destination of the data packet?

    1. The gateway address.
    2. The loopback address (127.0.0.1).
    3. Within the same LAN.
    4. The 192.0.0.0 subnet.
    5. The answer is not listed here.
  2. Computer #1 IP address: 172.23.109.47
    Computer #1 Subnet Mask: 255.255.255.0
    Computer #2 IP address: 172.23.109.33

    Computer #1 pings Computer #2. What is the destination of the data packet?

    1. The gateway address.
    2. The 255.255.255.0 subnet.
    3. The broadcast domain
    4. Within the same LAN.
    5. The answer is not listed here.
  3. Computer #1 IP address: 192.168.171.115
    Computer #1 Subnet Mask: /24
    Computer #2 IP address: 192.168.171.87

    Computer #1 pings Computer #2. What is the destination of the data packet?

    1. Within the same LAN.
    2. The gateway, because Computer #2 is in the 192.168.171.171 subnet.
    3. The gateway, because Computer #2 is in the 192.168.1.0 subnet.
    4. The gateway, because Computer #2 is in the 192.168.1.1 subnet.
    5. The answer is not listed here.
  4. Computer #1 IP address: 143.56.218.17
    Computer #1 Subnet Mask: 255.255.192.0
    Computer #2 IP address: 173.218.37.32

    Computer #1 pings Computer #2. What becomes of the data packet?

    1. The packet goes to the 173.0.0.0 subnet.
    2. The packet goes to the gateway.
    3. The packet destination is a broadcast domain, so an ARP request is performed to find the MAC address.
    4. The packet goes to the gateway, whose IP address is 143.56.192.250.
    5. The answer is not listed here.
  5. Computer #1 IP address: 10.23.11.7
    Computer #1 Subnet Mask: 255.255.192.0
    Computer #2 IP address: 10.23.13.7

    Computer #1 pings Computer #2. What is the destination of the data packet?

    1. The gateway.
    2. To IP address 10.10.20.192.
    3. The broadcast domain, because 10.23.13.7 is in a different LAN.
    4. The 127.0.0.1 (localhost) subnet.
    5. The answer is not listed here.
  6. Computer #1 IP address: 172.29.201.18
    Computer #1 Subnet Mask: 255.255.255.224
    Computer #2 IP address: 172.29.201.73

    Computer #1 pings Computer #2. What becomes of the data packet?

    1. Goes to the gateway.
    2. Goes to the (loopback) interface.
    3. The .64 subnet's broadcast address, so Computer #1 will never get a reply.
    4. If a gateway destination has not been specified, the destination host at 172.29.201.73 will send back four replies.
    5. The answer is not listed here.
  7. A data packet is sent:
    Subnet Mask: 255.255.255.240
    Destination IP: 172.24.209.123

    What is the target subnet, to which the data packet is sent?

    1. The 172.24.224.0 subnet.
    2. The 172.24.0.0 subnet.
    3. The 172.24.224.128 subnet.
    4. The 172.24.209.112 subnet.
    5. It is a broadcast, so it will go to all of the subnets listed in A-D above.
  8. A data packet is sent:
    Subnet Mask: /30
    Destination IP: 172.22.218.177

    What becomes of the data packet?

    1. The packet goes to 172.22.0.0 subnet.
    2. The destination IP is actually the broadcast address for the 172.22.218.244 subnet. Therefore, the packet is discarded.
    3. The packet goes to 172.22.218.176 subnet.
    4. First, the gateway -- where the packet is subsequently routed to the 172.22.218.0 network.
    5. The answer is not listed here.
  9. A data packet is sent:
    Subnet Mask: 255.255.255.192
    Destination IP: 172.18.175.94

    What is the destination of the data packet?

    1. The 172.18.175.192 subnet.
    2. The 172.18.175.64 subnet.
    3. The 172.168.175.0 subnet.
    4. The 172.168.175.224 subnet.
    5. The 172.168.143.0 subnet.
  10. Subnet Mask: 255.255.255.255
    Destination IP: 19.0.0.7

    What becomes of the data packet?

    1. The destination IP is actually a multicast address -- whose subnet mask is 255.255.255.255. The data packet is sent to all hosts in the multicast domain of 119.0.0.7.
    2. The data packet goes directly to the specific host/device at 19.0.0.7.
    3. The network throws out the data packet, so it never reaches any destination.
    4. The destination IP is actually a broadcast address, which causes an ARP request to be broadcast.
    5. The answer is not listed here.