Chapter 8

Question 1

what is a subnet masks?

236

Answer 1

it is a 32 bit value that allows the recipient of IP packets to distinguish the network ID portion of the IP address from the host ID portion of the IP address.

Question 2

what is the largest subnet mask available?

237

Answer 2

/30 is the largest subnet mask available because we have to keep at least 2 bits for host bits.

Question 3

/8 through /15 can be used only with class____network

239

Answer 3

A

Question 4

/16 through /23 can be used in class \_\_ and \_\_\_network
239

Answer 4

A and B

Question 5

/24 through /30 can be used in class \_\_ and \_\_\_and \_\_ network.
239

Answer 5

A and B and C

Question 6

when ping 127.0.0.1 fails what is the problem?

257

Answer 6

there is an IP stack failure and need to reinstall TCP/IP

Question 7

when you ping the IP address of the host and it fails, what is the problem?
258

Answer 7

the problem is ion the NIC card.

Question 8

when you ping the Default gateway and it fails, what is the problem?
258

Answer 8

any thing from NIC to the router.

Question 9

what is NAT?

264

Answer 9

Short for Network Address Translation, an Internet standard that enables a local-area network (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic

Question 10

3 types of NAT, what are they?

265

Answer 10

static NAT ( SNAT)
dynamic NAT (DNAT)
Overloading

Question 11

static NAT

266

Answer 11

A type of NAT in which a private IP address is mapped to a public IP address, where the public address is always the same IP address (i.e., it has a static address). This allows an internal host, such as a Web server, to have an unregistered (private) IP address and still be reachable over the Internet.

Question 12

Dynamic NAT

266

Answer 12

Dynamic NAT translates a group of real addresses to a pool of mapped addresses that are routable on the destination network. The mapped pool may include fewer addresses than the real group. When a host you want to translate accesses the destination network, the ASA assigns the host an IP address from the mapped pool.

Question 13

Overloading

Answer 13

NAT Overloading or Port Address Translation (PAT) is a modified form of dynamic NAT where the number of inside local addresses is greater than the number of inside global addresses. Mostly, there is just a single inside global IP address providing Internet access to all inside