READ Free Dumps For Cisco- 100-101
| Question ID 6411 | When configuring NAT, the Internet interface is considered to be what?
|
| Option A | local
|
| Option B | insid
|
| Option C | global
|
| Option D | outside
|
| Correct Answer | d |
Explanation Network address translation or NAT requires the Internet to be considered as an outside interface else it won't serve the purpose it intends to. On the interface connecting to the Internet of the router we have to use the command “ip nat outside†for NAT to work. It identifies that interface as the outside interface.
| Question ID 6412 | The ip helper-address command does what?a
|
| Option A | assigns an IP address to a hostv
|
| Option B | resolves an IP address from a DNS servera
|
| Option C | relays a DHCP request across networks
|
| Option D | resolves an IP address overlapping issue
|
| Correct Answer | c |
Explanation http://cisconet.com/tcpip/dhcp/107-how-to-use-ip-helper-address-to-connect-remote-dhcp- server.html When the DHCP client sends the DHCP request packet, it doesn't have an IP address. So it uses the all-zeroes address, 0.0.0.0, as the IP source address. And it doesn't know how to reach the DHCP server, so it uses a general broadcast address, 255.255.255.255, for the destination. So the router must replace the source address with its own IP address, for the interface that received the request. And it replaces the destination address with the address specified in the ip helper-address command. The client device's MAC address is included in the payload of the original DHCP request packet,so the router doesn't need to do anything to ensure that the server receives this information.