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  • Question
  • Which two statements describe the IP address 10.16.3.65/23?

    1. The subnet address is 10.16.3.0 255.255.254.0.
    2. The lowest host address in the subnet is 10.16.2.1 255.255.254.0.
    3. The last valid host address in the subnet is 10.16.2.254 255.255.254.0.
    4. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.


  • Options
  • A. 1 and 3
  • B. 2 and 4
  • C. 1, 2 and 4
  • D. 2, 3 and 4

  • Correct Answer
  • 2 and 4 

    Explanation
    The mask 255.255.254.0 (/23) used with a Class A address means that there are 15 subnet bits and 9 host bits. The block size in the third octet is 2 (256 - 254). So this makes the subnets in the interesting octet 0, 2, 4, 6, etc., all the way to 254. The host 10.16.3.65 is in the 2.0 subnet. The next subnet is 4.0, so the broadcast address for the 2.0 subnet is 3.255. The valid host addresses are 2.1 through 3.254.

  • Subnetting problems


    Search Results


    • 1. Which of the following types of connections can use full duplex?

      1. Hub to hub
      2. Switch to switch
      3. Host to host
      4. Switch to hub
      5. Switch to host

    • Options
    • A. 1, 2 and 4
    • B. 3 and 4
    • C. 3 and 5
    • D. 2, 3 and 5
    • Discuss
    • 2. Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

    • Options
    • A. Layer 2
    • B. Layer 3
    • C. Layer 4
    • D. Layer 7
    • Discuss
    • 3. What type of RJ45 UTP cable is used between switches?

    • Options
    • A. Straight-through
    • B. Crossover cable
    • C. Crossover with a CSU/DSU
    • D. Crossover with a router in between the two switches
    • Discuss
    • 4. What are the decimal and hexadecimal equivalents for the binary number 10110111?

    • Options
    • A. 69/0x2102
    • B. 183/B7
    • C. 173/A6
    • D. 83/0xC5
    • Discuss
    • 5. Which fields are contained within an IEEE Ethernet frame header?

      1. Source and destination MAC address
      2. Source and destination network address
      3. Source and destination MAC address and source and destination network address
      4. FCS field

    • Options
    • A. 1 and 4
    • B. 2 only
    • C. 2 and 3 only
    • D. 3 only
    • Discuss
    • 6. Using the following illustration, what would be the IP address of E0 if you were using the eighth subnet? The network ID is 192.168.10.0/28 and you need to use the last available IP address in the range. The zero subnet should not be considered valid for this question.

    • Options
    • A. 192.168.10.142
    • B. 192.168.10.66
    • C. 192.168.100.254
    • D. 192.168.10.143
    • E. 192.168.10.126
    • Discuss
    • 7. The network address of 172.16.0.0/19 provides how many subnets and hosts?

    • Options
    • A. 7 subnets, 30 hosts each
    • B. 8 subnets, 8,190 hosts each
    • C. 8 subnets, 2,046 hosts each
    • D. 7 subnets, 2,046 hosts each
    • Discuss
    • 8. Your router has the following IP address on Ethernet0: 172.16.2.1/23. Which of the following can be valid host IDs on the LAN interface attached to the router?

      1. 172.16.1.100
      2. 172.16.1.198
      3. 172.16.2.255
      4. 172.16.3.0

    • Options
    • A. 1 only
    • B. 2 and 3 only
    • C. 3 and 4 only
    • D. None of the above
    • Discuss
    • 9. You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to the router interface?

    • Options
    • A. 6
    • B. 8
    • C. 30
    • D. 32
    • Discuss
    • 10. To test the IP stack on your local host, which IP address would you ping?

    • Options
    • A. 127.0.0.0
    • B. 1.0.0.127
    • C. 127.0.0.1
    • D. 127.0.0.255
    • Discuss


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