Network+ Ch8

  1. 21=
    2
  2. 22=
    4
  3. 23=
    8
  4. 24=
    16
  5. 25=
    32
  6. 26=
    64
  7. 27=
    128
  8. 28=
    256
  9. 29=
    512
  10. 210=
    1,024
  11. 211=
    2,048
  12. 212=
    4,096
  13. 213=
    8,192
  14. 214=
    16,384
  15. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet?






    F. 30
  16. You have a Class A host of 10.0.0.110/25.  It needs to communicate to a host with an IP address of 10.0.0.210/25.  Which of the following devices do you need to use in order for those hosts to communicate?




    D. Router
  17. What is the subnetwork address for a host with the IP address 200.10.5.68/28?




    C. 200.10.5.64
  18. The network address of 172.16.0.0/19 provides how many subnets and hosts?






    D. 8 subnets, 8,190 hosts each
  19. You receive a call from a user who is complaining that they cannot get on the Internet.  You have them verify their IP address, mask, and default gateway.  The IP address is 10.0.37.144, with a subnet mask of 255.255.254.0.  The default gateway is 10.0.38.1.  What is the problem?
    Incorrect gateway IP
  20. If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?
    172.16.45.12
  21. On a network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?





    B. /30
  22. On which of the following devices are you most likely to be able to implement NAT?




    D. Router
  23. 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 router interface?
    6
  24. When configuring the IP settings on a computer on one subnet to ensure that it can communicate with a computer on another subnet, which of the following is desirable?




    D. Configure the computer with a default gateway that matches the IP address of the interface of the router that is attached to the same subnet as the computer
  25. You have an interface on a router with the IP address of 192.168.192.10/29.  What is the broadcast address the hosts will use on this LAN?
    192.168.192.15
  26. What is the highest usable address on the 172.16.1.0/24 network?
    172.16.1.254
  27. A network administrator is connecting two hosts directly through their Ethernet interfaces using a straight-through cable.  Ping attempts between the hosts are unsuccessful.

    Host 1:
    IP: 192.168.1.20
    Mask: 255.255.255.240

    Host 2:
    IP: 192.168.1.201
    Mask: 255.255.255.240

    What can be done to provide connectivity between the hosts? (choose 2)





    • C. A crossover cable should be used in place of the straight-through cable
    • E. The subnet masks should be set to 255.255.255.0
  28. What is the formula for calculating the number of subnets?
    • 2= number of subnets,
    • where x is the number of masked bits
  29. What is the formula for calculating the number of hosts per subnet?
    • 2y-2 = number of hosts per subnet,
    • where y is the numner of unmasked bits
  30. What is the formula for calculating the valid subnets?
    256-subnet mask = block size, or increment number

    Start with 0 then add the block size until the subnet mask value is reached
  31. What is the formula for calculating the broadcast address for each subnet?
    • Next subnet address - 1 = broadcast address
    • The broadcast address of the last subnet is always 255
  32. What is the formula for calculating the valid host addresses on a subnet?
    It's the numbers between the subnet address and the broadcast address
  33. What are the steps in troubleshooting an IP problem?
    • 1. Ping 127.0.0.1
    • 2. Ping the local host address
    • 3. Ping the router
    • 4. Ping the remote server
  34. What are the different types of NAT?
    • 1. Static NAT (SNAT)
    • 2. Dynamic NAT
    • 3. Port Address Translation (PAT), aka Overloading
  35. What does the following represent?
    64.41.7.3:23
    Port Address Translation (PAT)
Author
a2k2d2
ID
232599
Card Set
Network+ Ch8
Description
Network+ Ch8
Updated