1 ping wwwgooglecom Q1 do you get a reply What is the messag

1. ping www.google.com
   Q1: do you get a reply? What is the message?
   Q2: what is the round-trip time?

2. ping www.silentcircle.com
   Q3: do you get a reply?
   Q4: What is the message?

3. use traceroute to trace the network path to www.u-tokyo.ac.jp.
   Q5: how many hops are in the path?

4. repeat #3.
   Q6: does your trace take an identical path to the target?
   Q7: what is the average round trip time?

5. find out what daemons are running on your system.
   Q8: what command do you use? what options?
   Q9: how many tcp sockets are listening?
   Q10: how many udp sockets are listening?

Solution

1) Q1: Yes, I got a reply. Message is given below.

Pinging www.google.com [216.58.220.4] with 32 bytes of data:
Reply from 216.58.220.4: bytes=32 time=6ms TTL=57
Reply from 216.58.220.4: bytes=32 time=11ms TTL=57
Reply from 216.58.220.4: bytes=32 time=5ms TTL=57
Reply from 216.58.220.4: bytes=32 time=5ms TTL=57

Ping statistics for 216.58.220.4:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 5ms, Maximum = 11ms, Average = 6ms

Q2: Round trip time in milliseconds:

       Minimum = 5ms, Maximum = 11ms, Average = 6ms

2. Q3: Yes, I got a reply.

    Q4: Message is:          

Pinging www.silentcircle.com [139.162.193.54] with 32 bytes of data:
Reply from 139.162.193.54: bytes=32 time=119ms TTL=53
Reply from 139.162.193.54: bytes=32 time=119ms TTL=53
Reply from 139.162.193.54: bytes=32 time=121ms TTL=53
Reply from 139.162.193.54: bytes=32 time=119ms TTL=53

Ping statistics for 139.162.193.54:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 119ms, Maximum = 121ms, Average = 119ms

3. Q5: Total 21 hopes are in path. Output is given below.

C:\\Users>tracert www.u-tokyo.ac.jp

Tracing route to www.u-tokyo.ac.jp [210.152.135.178]
over a maximum of 30 hops:

1     1 ms     1 ms     2 ms router.asus.com [192.168.1.1]
2     2 ms     1 ms    27 ms 100.68.0.1
3     5 ms     4 ms     7 ms Pune-Core01.youbroadband.in [203.187.215.1]
4     5 ms     3 ms     3 ms 121.241.66.110.static-pune.vsnl.net.in [121.241.66.110]
5     3 ms     2 ms     2 ms 172.31.182.133
6    24 ms    24 ms    24 ms 172.31.16.193
7    25 ms    29 ms    26 ms ix-ae-4-2.tcore1.CXR-Chennai.as6453.net [180.87.36.9]
8   274 ms   274 ms   273 ms if-ae-7-2.tcore1.MLV-Mumbai.as6453.net [180.87.36.33]
9   274 ms   274 ms   274 ms if-ae-2-2.tcore2.MLV-Mumbai.as6453.net [180.87.38.2]
10   272 ms   284 ms   271 ms if-ae-16-2.tcore1.SVW-Singapore.as6453.net [180.87.12.226]
11   270 ms   269 ms   269 ms if-ae-11-2.thar1.SVQ-Singapore.as6453.net [180.87.98.37]
12   273 ms   272 ms   272 ms ae-6.r00.sngpsi05.sg.bb.gin.ntt.net [129.250.8.241]
13   279 ms   274 ms   274 ms ae-10.r20.sngpsi05.sg.bb.gin.ntt.net [129.250.7.18]
14   364 ms   363 ms   368 ms ae-12.r25.osakjp02.jp.bb.gin.ntt.net [129.250.3.109]
15   354 ms   354 ms   354 ms ae-24.r01.osakjp02.jp.bb.gin.ntt.net [129.250.5.49]
16   357 ms   356 ms   356 ms xe-0-4-0-7.r01.osakjp02.jp.ce.gin.ntt.net [61.200.80.218]
17     *        *        *     Request timed out.
18     *        *        *     Request timed out.
19     *        *        *     Request timed out.
20   361 ms   361 ms   360 ms 154.34.240.254
21   363 ms   363 ms   365 ms 210.152.135.178

Trace complete.

4) Q6: Yes, Trace take an identical path to the target. As shown in output given in Answer of Q5 the last hop is target.

    Q7: As output shown above last line shows the round trip time for final destination i.e. 363ms 363ms 365ms

            Average round trip time : (363+363+365)/3=363.6667 ms