ccna 2.4 quiz

1.what are three advantages of NAT?(choose three)

·         Conserves  registered public IP addresses

·         Reduces CPU usage on customer routers

·         Creates multiple public IP addresses

·         Hide private addressing from the internet

·         Permits LAN expansion without additional IP address

·         Improves the performance of border router

2.what is the default subnet mask for the address  172.31.18.222?

·         255.0.0.0

·         255.255.0.0

·         255.255.255.0

·         255.255.255.254

·         255.255.255.255

3.which three address are valid subnetwork addresses when 175.25.15.0/24 is further subnetted by borrowing  an additional for bits(choose three)

·         172.25.15.0

·         172.25.15.8

·         172.25.15.16

·         172.25.15.40

·         172.25.25.96

·         172.25.15.248

4.where are the high order binary number  that begin a class c address

·         000

·         001

·         010

·         110

5.host A is configure with IP address 192.168.75.34 and host B is configured with IP address 192.168.75.50.each are using  same subnet mask of 255.255.255.240 but are not able to ping each other.what networking devices are needed for these two host to communicate?

·         Switch

·         Hub

·         Server

·         Router

6.what two pieces can be derived from the IP address 192.168.42.135/24(choose two)

·         This is a class c address because the high order bits are 110

·         The  default subnet mask is 255.255.255.0

·         The host portion is represented by the third and four octets

·         The seconds high order bits is a o so this is a class b address

·         The host address belong to the parent 192.168.0.0 network

·         This is one host address out of a possible 65,534 addresses

7.what subnet mask is indicated by the network address 172.16.4.8/18

·         255.255.0.0

·         255.255.192.0

·         255.255.240.0

·         255.255.248.0

·         255.255.255.0

8.click and drag the IP address on the left to the appropriate description on the right

223.14.6.95

127.0.0.0

191.82.0.0

224.100.35.76

61.0.0.255

255.255.0.0

124.255.255.255

9.the web server S2  needs to be accessible from the internet.which NAT option will provie a method for outside host to access S2 ?

·         Dynamic NAT  using a NAT pool

·         Static NAT

·         Port address translation

·         Dynamic NAT with overload

10.when a network administrator apllies the subnet mask 255.255.255.248 to a class B address,for any given subnet,how many IP addresses are available to be assigned to devices?

·         6

·         30

·         126

·         254

·         510

·         1022

11.an ISP customer has obtained a class C network address.the network technician needs to create five usable subnets,with each subnet capable of containing at least 20 host addresses.what is the appropriate subnet mask to use?

·         255.255.255.0

·         255.255.255.192

·         255.255.255.224

·         255.255.255.240

12.click and drag the characteristic on the left to the correct IP version on the right

IPv4

Is usually expressed in dotted  ecim al notation

Is in widespread use on the internet

Uses a 32-bit address

IPv6

Contains a 24-bit global previx

Is usually expressed in hexadecimal notation

Uses a 128-bit address