Lab7
1. When we are clicking on the one of dhcp. We can see the port number in there.
Source port is 68 and destination port is 67. It means UDP(UDP port)
2. It is 0.0.0.0. This is special address and it means that user does not yet have an IP address. That
exactly why DCHP is needed.
3. 255.255.255.255 – This is the broadcast address. The client sends the all data to all devices in
the network because it does not know DHCP server yet.
4. 0x56f415ed this is the transaction ID and it randomly generated by the client. Here we are
seeing the same ID in all packets. It means they belong to the same DHCP process.
5.
Subnet Mask, Domain Name Server, Router, Domain name, domain search
6. DHCP discover and DHCP offer Transaction IDs are the same. DHCP uses this IDs for matching
messages. Same ID = Same communication session
7. 192.168.86.1 – it is valid configured IP
8. 192.168.86.65 – this is not broadcats, it is unicast address. The server already knows the client
MAC address and sends it directly
9.
10. Same ports in the 1st question
11. 0.0.0.0 (no assigned IP yet) – the client doesn’t officially own the IP yet . Even though it got an
Offer, it must wait for ACK
12. Destination: 255.255.255.255 – this is broadcast. The client sends requests to all DHCP servers
13. Discover and offer IDs are the same. All messages are belong to the same DHCP server
14.
15. Source: 192.168.86.1 - this is the DHCP server – router. Same as in the offer message. Nothing
unusual it is a valid configured IP of the server
16. Destination: 192.168.86.65 – this is now unicast not broadcast. It is the client assigned IP
address. The server fully confident. The client can receive packets on this IP
17. 192.168.86.65
18.
19. 192.168.86.1
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