I
tried ping command to 144.16.59.128
ping
144.16.59.128
64
bytes from 144.16.59.128: icmp_seq=0 ttl=64 time=13.582 msec
64
bytes from 144.16.59.128: icmp_seq=1 ttl=64 time=652 usec
64
bytes from 144.16.59.128: icmp_seq=2 ttl=64 time=1.806 msec
64 bytes from 144.16.59.128: icmp_seq=3 ttl=64 time=1.290 msec
Analysis
of
Sequence number is the
number the packet had, when sent. (If a host is far away, or if is busy, some
packets might be swapped, and will arrive in a different order).
It
is a Unix utility used for querying Internet domain
name servers. The basic use is to find the ip address
corresponding to a given hostname (or vice versa)
nslookup csa.iisc.ernet.in
Note:
nslookup is deprecated and may be removed from
future releases.
Consider using the `dig' or
`host' programs instead. Run nslookup with
the `-sil[ent]' option to prevent this
message from appearing.
Server:
144.16.64.6
Address:
144.16.64.6#53
Name: csa.iisc.ernet.in
another
example:
nslookup www.yahoo.com
Note:
nslookup is deprecated and may be removed from
future releases.
Consider using the `dig' or
`host' programs instead. Run nslookup with
the `-sil[ent]' option to prevent this
message from appearing.
Server:
144.16.64.2
Address:
144.16.64.2#53
Non-authoritative
answer:
www.yahoo.com
canonical name = www.yahoo.akadns.net.
Name:
www.yahoo.akadns.net
Address:
66.218.70.48
Name:
www.yahoo.akadns.net
Address:
66.218.71.84
Name:
www.yahoo.akadns.net
Address:
66.218.71.95
Name:
www.yahoo.akadns.net
Address:
66.218.71.93
Name:
www.yahoo.akadns.net
Address:
66.218.71.94
Name:
www.yahoo.akadns.net
Address:
66.218.70.49
Name:
www.yahoo.akadns.net
Address:
66.218.71.87
Name:
www.yahoo.akadns.net
Address:
66.218.71.90
Dig
(domain information groper) is a flexible tool for interrogating DNS (Domain
Name
Servers). It performs DNS lookups and
displays the answers that are returned from
the
name server(s) that
were queried
dig www.iisc.ernet.in
;
<<>> DiG 9.2.1 <<>> www.iisc.ernet.in
;; global options:
printcmd
;; Got
answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46517
It traces
path to <destination> discovering MTU (Maximum Transferable unit) along
this path. It uses UDP port <port> or some random
port.
tracepath www.iisc.ernet.in
1?: [LOCALHOST]
pmtu 1500
1:
144.16.79.155 6.600ms
reached
Resume: pmtu
1500 hops 1 back 1
pmtu :path mtu(shortest mtu along the path)
;; flags: qr rd ra; QUERY: 1, ANSWER: 1,
AUTHORITY: 6, ADDITIONAL: 6
;; QUESTION
SECTION:
;www.iisc.ernet.in. IN
A
;; ANSWER
SECTION:
www.iisc.ernet.in. 11536
IN
A 144.16.79.155
;; AUTHORITY
SECTION:
iisc.ernet.in. 9593
IN
NS dns.iisc.ernet.in.
iisc.ernet.in. 9593
IN
NS ece.iisc.ernet.in.
iisc.ernet.in. 9593
IN
NS e-iisc01.iisc.ernet.in.
iisc.ernet.in. 9593
IN
NS e-iisc02.iisc.ernet.in.
iisc.ernet.in. 9593
IN
NS naamak.ncst.ernet.in.
iisc.ernet.in. 9593
IN
NS ss585.ncst.ernet.in.
;; ADDITIONAL
SECTION:
dns.iisc.ernet.in. 7275
IN
A 144.16.64.6
ece.iisc.ernet.in. 8361
IN
A 144.16.64.2
e-iisc01.iisc.ernet.in.
3891 IN
A 202.141.1.131
e-iisc02.iisc.ernet.in.
3891 IN
A 202.141.1.132
naamak.ncst.ernet.in. 1603
IN
A 202.41.110.66
ss585.ncst.ernet.in.
1520
IN A
202.141.150.18
;; Query time: 11 msec
;; SERVER:
144.16.64.6#53(144.16.64.6)
;; WHEN: Sat Oct 11
;; MSG SIZE
rcvd: 288
Address:
144.16.67.8