CompTIA Network+ Ch.8: IP Subnetting, Troubleshooting IP, and Introduction to NAT

On a network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?

/30

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 subnetwork address for a host with the IP address 200.10.5.68/28?

200.10.5.64

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?

6

The network address of 172.16.0.0/19 provides how many subnets and hosts?

8 subnets, 8,190 hosts each

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?

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

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? (2)

-172.16.2.255 -172.16.3.0

A network administrator is connecting two hosts directly through their Ethernet interfaces, as shown in the illustration. Ping attempts between the hosts are unsuccessful. What can be done to provide connectivity between the hosts? (2)

-A crossover cable should be used in place of the straight-through cable -The subnet mask should be set to 255.255.255.0

What is the highest usable address on the 172.16.1.0/24 network?

172.16.1.254

If an Ethernet port on a router was assigned an IP address of 172.16.112.1/25, what would be the subnet address of this host?

172.16.112.0

You have a network with a subnet of 172.16.17.0/22. Which of the following is a valid host address?

172.16.18.255 255.255.252.0

If a host on a network has the address of 172.16.45.14./30, what is the subnetwork this host belongs to?

172.16.45.12

Using the following illustration, what would be the IP address of E0 if you were using the first subnet? The network ID is 192.168.10.0/28, and you need to use the last available IP address in the range. The 0 subnet should not be considered valid for this question.

192.168.10.142

Using the following illustration in question 15, what would be the IP address of E0 if you were using the first subnet? The network ID is 192.168.10.0/28, and you need to use the last available IP address in the range. Again, the 0 subnet should not be considered valid for this question.

192.168.10.30

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 mask?

30

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

You have one IP address provided from your ISP with a /30 mask. However, you have 300 users that need to access the Internet. What technology will you use to implement a solution?

PAT

On which of the following devies are you most liekley to be able to implement NAT?

Router

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 these hosts to communicate?

Router

If you are forced to replace a router that has failed to the point that you are unable to access its current configuration to aid in setting up interface addresses on the new router, which of the following can you reference for assistance?

The default gateway settings on the computers from each subnet that the old router interconnected