Question
Transcribed Text
CS Computer Networking
Local DNS
Root DNS
Local DNS
10.4.82.251
DNS.
139.8.82.4
74. 125.222.70
Eth:3d 6c 2b 45 de 12
Eth:3b 6d 2b
Eth:98 4e 2b
35 71
23
DNS
DNS.
10.4.82.251
135.8.82.3
186.8.82.8
Eth:3d 6c 2b
Eth:34 6d 2b
Eth:31 4e 2b
45 64 7e
35 7c 70
35 89 29
131.8.82.2
176.8.82.8
186.8.82.9
Eth:34 6d 2b
Eth:3b 4e 2b
Eth:33 4e 2b
45 64 79
35 89 2c
23 47 8d
10.4.82.254
(me. os bsu. .edu)
Eth: 32 4e 3b 68 47 82
www.google.com
(74.125.224.72)
Eth: 99 4e 2b 23 47 82
Refer to the above network diagram. Assume the computer me.cs .bsu.edu is a new
computer and just installed to the network of cs.bsu.edu. The user tries to access
google.com. Please describe the procedure of what to happen in numbered steps (e.g.
Step 1, Step 2...). You have to
include the specific steps of DHCP, DNS, TCP connection and HTTP data packet
explain the addressing information during the encapsulation at layer 4, 3, and 2
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1) The PC transmits a query to the local DNS server (IP= 10.4.82.251) in order to find out the IP address of the target address www.google.com2) The local DNS server searches among its record if it knows the IP address of the target address www.google.com (It is very likely to have it from requests originated from other clients from the network). If it already has it, then it replies back to the PC with the IP address of the website www.google.com.
If it doesn’t have it, then
2.1) it queries further the root DNS server (139.8.82.4).
2.2) The root DNS server will query the local DNS residing in the same network with www.google.com...
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