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?
E. 30
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?
A. Router
What is the subnetwork address for a host with the IP address 200.10.5.68/28?
D. 200.10.5.64
The network address of 172.16.0.0/19 provides how many subnets and hosts?
F. 8 subnets, 8,190 hosts each
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
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
On a network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?
A. /30
On which of the following devices are you most likely to be able to implement NAT?
D. Router
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
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?
A. 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
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
What is the highest usable address on the 172.16.1.0/24 network?
172.16.1.254
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)
E. 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
What is the formula for calculating the number of subnets?
2x = number of subnets,
where x is the number of masked bits
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
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
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
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
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
What are the different types of NAT?
1. Static NAT (SNAT)
2. Dynamic NAT
3. Port Address Translation (PAT), aka Overloading
