To be delivered Tuesday and Wednesday 10 and 11 April , print and fill in hand written.

Fill in the ip addresses where there is IP:

1-Y@idm sends an email to x@sodetel : 

   A- SMTP packet goes from Y@idm PC to SMTP.IDM

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcpc1	| MAcS1	| 200.5.5.1	| 200.5.5.11	| 55000	| 25	|

   B- Then from SMTP.idm to SMTP.Sodetel : fill in the following: (note that you must organize them by numbering them .

SMTP packet

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcsmtp	| Macs1	| 200.5.5.11	| 193.168.0.1	| 25	| 25	|

Arp request Packet

 Source Mac	| Dest Mac	| Who has IP 	| 	| 	| 	|
 MAcsmtp	| FF-FF-FF-FF	| 193.168.0.1	| 	| 	| 	|

Arp reply Packet

 Source Mac	| Dest Mac	| Who has IP	| 	| 	| 	|
 MAsodetel	| MAcr3.2	| 193.168.0.1	| 	| 	| 	|

DNS Packet 

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcsmtp	| MacS1	| 200.5.5.11	| 193.168.0.1	| 53	| 55,000	|

DNS reply packet

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcr3.2	| MAcr3.1	| 193.168.0.1	| 200.5.5.11	| 55,000	| 53	|

Smtp reply packet

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcr3.2	| MAcr3.1	| 193.168.0.1	| 200.5.5.11	| 25	| 25	|

   C- The email now arrived at SMTP.sodetel , and then to POP.sodetel , what happens now ?

When the email arrives at the servers the popserver is used to reply and the smtp server is used to receive so the SMTP server will receive the email and then the POP server will reply to the email

   D- Assign an IP , SM , DG and an external DNS for PC5, also a real mac address.

PC 5:   IP address:192.168.0.1
            Default gateway:192.168.1.10
	Subnet mast:255.255.255.0
	DNS:5.5.5.5

   E- PC5 sent a request to ftp://5.5.5.5 

What will be the second packet coming out of PC5 : 
1-an ARP packet
-----2-a DNS packet
3-an http packet
4-an ftp packet 

	Justify below:

 The first request coming out of pc 5 will be the arp request since the pc will send a broadcast message to all pc finding the mac of the destination pc using the ip address. The second request will be the DNS request to get the equivalent ip address as a domain name.	|
 

   F- Yahoo is replying fill in the below FTP reply packet

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 Yahoo mac	| MAcr3.1	| 5.5.5.5	| 192.168.0.1	| 53	| 55,000	|

   G- The ftp reply packet is on R3 now :

 Source Mac	| Dest Mac	| Source IP 	| Dest IP	| Source Port	| Dest Port	|
 MAcr3.2	| Macs3	| 193.168.0.1	| 192.168.0.1	| 21	| 55,000	|

   H- How many collision domains exist in the first network (IDM), how many broadcast domains ?

 10 collision domains and 2 broadcast domains.	|