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5 Written questions

5 Matching questions

  1. You have a Class B network and need 29 subnets. What is your mask?
  2. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the subnet mask?
  3. You have an interface on a router with the IP address of What is the broadcast address the hosts will use on this LAN?
  4. Unable to Ping Default Gateway
  5. How many valid hosts per subnet?
  1. a A /27 ( is 3 bits on and 5 bits off. This provides 8 subnets, each with 30 hosts. Does it matter if this mask is used with a Class A, B or C network address? Not at all. The amount of hosts bits would never change.
  2. b 2y - 2 where y is the number of unmasked bits (or 0's)
  3. c A /29 ( has a block size of 8 in the fourth octet. This means the subnets are 0, 8, 16, 24, etc. 10 is in the 8 subnet. The next subnet is 16, so 15 is the broadcast address.
  4. d This is 5 bits of subnetting, which provides 32 subnets. This is our best answer, a /21
  5. e Local physical network problem between NIC and router

5 Multiple choice questions

  1. /29 is The fourth octet is a block size of 8. 0, 8, 16, 24. The host is in the 16 subnet, broadcast of 23. Valid host 17-22
  2. 16,382
  3. Facilitated spanning of large geographical distances
  4. 11110000 = 240
  5. The subnet is The broadcast must be

5 True/False questions

  1. Unable to Ping Local HostLocal physical network problem between NIC and router


  2. Given, What are the valid subnets?0 & 128


  3. If an Ethernet port on a router were assigned an IP address of, what would be the valid subnet address of this host?A /25 mask is Used with a Class B network, the third and fourth octets are used for subnetting with a total of 9 subnet bits, 8 bits in the third octet and 1 bit in the fourth octet. Since there is only 1 bit in the fourth octet, the bit is either off or on—which is a value of 0 or 128. The host in the question is in the 0 subnet, which has a broadcast address of 127 since 128 is the next subnet.


  4. To test the IP stack on your local host, which IP address would you ping?This is a pretty simple question. A /28 is, which means that our block size is 16 in the fourth octet. 0, 16, 32, 48, 64, 80, etc. The host is in the 64 subnet.


  5. Additional Windows TroubleshootingTraceroute, Arp -a, Ipconfig /all