ICMP - DHCP - NAT

Question 1

ICMP Messages generated?

Answer 1

Type field Message
0 = Echo Reply

3 = Destination Unreachable

4 = Source Quench
- router faces congestion at any of its interfaces

5 = Redirect
- sent by router to the host to use more efficient routing.

8 = Echo Request
11 =Time Exceeded

Question 2

ICMP TYPE Field 0 message =?

Answer 2

Echo Reply

Question 3

ICMP TYPE Field 3 message =?

Answer 3

Destination Unreachable

Question 4

ICMP TYPE Field 4 message =?

Answer 4

Source Quench

- router faces congestion at any of its interfaces

Question 5

ICMP TYPE Field 5 message =?

Answer 5

Redirect

- sent by router to the host to use more efficient routing.

Question 6

ICMP TYPE Field 8 message =?

Answer 6

Echo Request

Question 7

ICMP TYPE Field 11 message =?

Answer 7

Time Exceeded

Question 8

NAT - 4 Types ?

Answer 8

NAT - 4 Types

1. Static
2. Dynamic
3. Overloading
4. Overlapping

Question 9

DHCP - “messages” ? and Unicast or Broadcast?;

Answer 9

• DHCPDISCOVER (Broadcast) Client to Server
• DHCPOFFER (Unicast) Server to Client
• DHCPREQUEST (Broadcast) Client to Server
• DHCPACK or DHCPNAK (Unicast) Server to Client