NAT and ICS

Question 1

Your computer has an IP address of 161.13.5.15. Your computer is on a:

Private network
Class C Network
Public network
Multi cast network

Answer 1

Public network

Question 2

Which of the following associate a port number with a host on a private network?

CIDR
PAT
NAT
VLSM

Answer 2

PAT - Port Address translation

Question 3

You have a computer that is connected to the Internet through a NAT router. You want to use a private addressing scheme for your Computer. Which of the following IP addresses could you assign to the computer? Select three answers.

240. 12.188.1
241. 15.166.12
242. 18.188.67
243. 0.0.1
244. 188.99.10
245. 0.12.15
246. 168.12.253

Answer 3

172. 18.188.67
173. 0.12.15
174. 168.12.253

Question 4

Which of the following IP addresses is a valid IP address from host on a public network?

172. 16.254.12
173. 15.6.1
174. 168.16.45
175. 3.125.2

Answer 4

142.15.6.1

Question 5

You have a small network at home that is connected to the Internet. On your home network you have a server with an IP address of 192.168.55.199/16. All computers on your home network can connect to Internet.

From your work office, you try to access your home computer using its IP address, but are unable to communicate with the server. You’re able to connect to other hosts on the Internet.

Why can’t you access the server?

– Private addresses are not accessible to the Internet
– The server must have an entry on the DNS server that exists on the Internet
– The server has been assigned a multi cast address
– The server isn’t using the default subnet mask

Answer 5

– Private addresses are not accessible to the Internet

Question 6

Which of the following is not one of the ranges of IP addresses defined in RFC 1918 that are commonly used behind a NAT server?

192. 168.0.1 - 192.168.255.254
193. 16.0.1 - 172.31.255.254
194. 0.0.1 - 10.255.255.254
195. 254.0.1 - 169.254.255.254

Answer 6

169.254.0.1 - 169.254.255.254

Question 7

You have a small network at home that is connected to the Internet. On your home network you have a server with the IP address of 192.168.55.199/16. You have a single public address that is shared by all host on your private network.

You want to configure the server as a Web server and allow Internet host to contact the server to browse a personal website.

What should you use to allow access?

Dynamic NAT
DNS CNAME Record
DNS A Record
Static NAT
Multi cast

Answer 7

Static NAT

Question 8

Which organization is responsible for allocating public IP addresses?

IANA
IETF
IEEE
CompTIa

Answer 8

IANA