📄 nslookup.txt
字号:
Answers to questions in Part 3:
1. The result is as follow:
C:\Documents and Settings\Administrator>nslookup
*** Can't find server name for address 192.168.0.1: Non-existent domain
*** Default servers are not available
Default Server: UnKnown
Address: 192.168.0.1
> root
Default Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
> set norecurse
> set type=NS
> www.apple.com
Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
com nameserver = L.GTLD-SERVERS.NET
com nameserver = M.GTLD-SERVERS.NET
com nameserver = A.GTLD-SERVERS.NET
com nameserver = B.GTLD-SERVERS.NET
com nameserver = C.GTLD-SERVERS.NET
com nameserver = D.GTLD-SERVERS.NET
com nameserver = E.GTLD-SERVERS.NET
com nameserver = F.GTLD-SERVERS.NET
com nameserver = G.GTLD-SERVERS.NET
com nameserver = H.GTLD-SERVERS.NET
com nameserver = I.GTLD-SERVERS.NET
com nameserver = J.GTLD-SERVERS.NET
com nameserver = K.GTLD-SERVERS.NET
A.GTLD-SERVERS.NET internet address = 192.5.6.30
A.GTLD-SERVERS.NET AAAA IPv6 address = 2001:503:a83e::2:30
B.GTLD-SERVERS.NET internet address = 192.33.14.30
B.GTLD-SERVERS.NET AAAA IPv6 address = 2001:503:231d::2:30
C.GTLD-SERVERS.NET internet address = 192.26.92.30
D.GTLD-SERVERS.NET internet address = 192.31.80.30
E.GTLD-SERVERS.NET internet address = 192.12.94.30
F.GTLD-SERVERS.NET internet address = 192.35.51.30
G.GTLD-SERVERS.NET internet address = 192.42.93.30
H.GTLD-SERVERS.NET internet address = 192.54.112.30
I.GTLD-SERVERS.NET internet address = 192.43.172.30
J.GTLD-SERVERS.NET internet address = 192.48.79.30
K.GTLD-SERVERS.NET internet address = 192.52.178.30
L.GTLD-SERVERS.NET internet address = 192.41.162.30
> set type=any
> www.apple.com 192.33.14.30
Server: [192.33.14.30]
Address: 192.33.14.30
apple.com nameserver = nserver.apple.com
apple.com nameserver = nserver.asia.apple.com
apple.com nameserver = nserver.euro.apple.com
apple.com nameserver = nserver2.apple.com
apple.com nameserver = nserver3.apple.com
apple.com nameserver = nserver4.apple.com
nserver.apple.com internet address = 17.254.0.50
nserver.asia.apple.com internet address = 17.82.254.3
nserver.euro.apple.com internet address = 17.72.133.64
nserver2.apple.com internet address = 17.254.0.59
nserver3.apple.com internet address = 17.112.144.50
nserver4.apple.com internet address = 17.112.144.59
> set type=any
> www.apple.com 17.254.0.50
Server: [17.254.0.50]
Address: 17.254.0.50
www.apple.com canonical name = www.apple.com.akadns.net
apple.com nameserver = nserver.euro.apple.com
apple.com nameserver = nserver3.apple.com
apple.com nameserver = nserver.apple.com
apple.com nameserver = nserver2.apple.com
apple.com nameserver = nserver.asia.apple.com
apple.com nameserver = nserver4.apple.com
nserver.apple.com internet address = 17.254.0.50
nserver2.apple.com internet address = 17.254.0.59
nserver.euro.apple.com internet address = 17.72.133.64
nserver.asia.apple.com internet address = 17.82.254.3
nserver3.apple.com internet address = 17.112.144.50
nserver4.apple.com internet address = 17.112.144.59
2.
From the result, we can know that the authoritative name servers use to find records are:
T-NS1.NET.cmu.edu internet address = 128.2.4.14
AC-TNS-1.NET.cmu.edu internet address = 128.2.1.5
AC-TNS-2.NET.cmu.edu internet address = 128.237.148.165
NY-SERVER-1.NET.cmu.edu internet address = 38.96.147.4
And the domain is cmu.edu.
And ux1.sp.cs.cmu.edu itself have no authoritative name servers.
Because all records available for ux1.sp.cs.cmu.edu by one of the four authoritative name servers.
And following is the result:
C:\Documents and Settings\Administrator>nslookup
*** Can't find server name for address 192.168.0.1: Non-existent domain
*** Default servers are not available
Default Server: UnKnown
Address: 192.168.0.1
> root
Default Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
> set norecurse
> set type=NS
> ux1.sp.cs.cmu.edu
Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
edu nameserver = M3.NSTLD.COM
edu nameserver = A3.NSTLD.COM
edu nameserver = C3.NSTLD.COM
edu nameserver = D3.NSTLD.COM
edu nameserver = E3.NSTLD.COM
edu nameserver = G3.NSTLD.COM
edu nameserver = H3.NSTLD.COM
edu nameserver = L3.NSTLD.COM
A3.NSTLD.COM internet address = 192.5.6.32
C3.NSTLD.COM internet address = 192.26.92.32
D3.NSTLD.COM internet address = 192.31.80.32
E3.NSTLD.COM internet address = 192.12.94.32
G3.NSTLD.COM internet address = 192.42.93.32
H3.NSTLD.COM internet address = 192.54.112.32
L3.NSTLD.COM internet address = 192.41.162.32
M3.NSTLD.COM internet address = 192.55.83.32
> set type=any
> ux1.sp.cs.cmu.edu 192.26.92.32
Server: [192.26.92.32]
Address: 192.26.92.32
cmu.edu nameserver = AC-TNS-2.NET.cmu.edu
cmu.edu nameserver = NY-SERVER-1.NET.cmu.edu
cmu.edu nameserver = T-NS1.NET.cmu.edu
cmu.edu nameserver = AC-TNS-1.NET.cmu.edu
T-NS1.NET.cmu.edu internet address = 128.2.4.14
AC-TNS-1.NET.cmu.edu internet address = 128.2.1.5
AC-TNS-2.NET.cmu.edu internet address = 128.237.148.165
NY-SERVER-1.NET.cmu.edu internet address = 38.96.147.4
> set type=any
> ux1.sp.cs.cmu.edu 128.2.4.14
Server: [128.2.4.14]
Address: 128.2.4.14
cs.cmu.edu nameserver = AC-DDNS-3.NET.cs.cmu.edu
cs.cmu.edu nameserver = AC-DDNS-2.NET.cs.cmu.edu
cs.cmu.edu nameserver = AC-DDNS-1.NET.cs.cmu.edu
AC-DDNS-1.NET.cs.cmu.edu internet address = 128.2.184.227
AC-DDNS-2.NET.cs.cmu.edu internet address = 128.2.184.228
AC-DDNS-3.NET.cs.cmu.edu internet address = 128.2.184.229
> set type=any
> ux1.sp.cs.cmu.edu 128.2.1.5
Server: [128.2.1.5]
Address: 128.2.1.5
cs.cmu.edu nameserver = AC-DDNS-2.NET.cs.cmu.edu
cs.cmu.edu nameserver = AC-DDNS-3.NET.cs.cmu.edu
cs.cmu.edu nameserver = AC-DDNS-1.NET.cs.cmu.edu
AC-DDNS-1.NET.cs.cmu.edu internet address = 128.2.184.227
AC-DDNS-2.NET.cs.cmu.edu internet address = 128.2.184.228
AC-DDNS-3.NET.cs.cmu.edu internet address = 128.2.184.229
3.
Using the nslookup, we will find that mail sent to nobody@ford.com will be sent to server mail.mailwatch.com or mail2.mailwatch.com.
The following is what I got:
C:\Documents and Settings\Administrator>nslookup
*** Can't find server name for address 192.168.0.1: Non-existent domain
*** Default servers are not available
Default Server: UnKnown
Address: 192.168.0.1
> root
Default Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
> set norecurse
> set type=NS
> ford.com
Server: A.ROOT-SERVERS.NET
Address: 198.41.0.4
com nameserver = A.GTLD-SERVERS.NET
com nameserver = G.GTLD-SERVERS.NET
com nameserver = H.GTLD-SERVERS.NET
com nameserver = C.GTLD-SERVERS.NET
com nameserver = I.GTLD-SERVERS.NET
com nameserver = B.GTLD-SERVERS.NET
com nameserver = D.GTLD-SERVERS.NET
com nameserver = L.GTLD-SERVERS.NET
com nameserver = F.GTLD-SERVERS.NET
com nameserver = J.GTLD-SERVERS.NET
com nameserver = K.GTLD-SERVERS.NET
com nameserver = E.GTLD-SERVERS.NET
com nameserver = M.GTLD-SERVERS.NET
A.GTLD-SERVERS.NET internet address = 192.5.6.30
G.GTLD-SERVERS.NET internet address = 192.42.93.30
H.GTLD-SERVERS.NET internet address = 192.54.112.30
C.GTLD-SERVERS.NET internet address = 192.26.92.30
I.GTLD-SERVERS.NET internet address = 192.43.172.30
B.GTLD-SERVERS.NET internet address = 192.33.14.30
D.GTLD-SERVERS.NET internet address = 192.31.80.30
L.GTLD-SERVERS.NET internet address = 192.41.162.30
F.GTLD-SERVERS.NET internet address = 192.35.51.30
J.GTLD-SERVERS.NET internet address = 192.48.79.30
K.GTLD-SERVERS.NET internet address = 192.52.178.30
E.GTLD-SERVERS.NET internet address = 192.12.94.30
M.GTLD-SERVERS.NET internet address = 192.55.83.30
A.GTLD-SERVERS.NET AAAA IPv6 address = 2001:503:a83e::2:30
> set type=any
> ford.com 192.5.6.30
Server: [192.5.6.30]
Address: 192.5.6.30
Non-authoritative answer:
ford.com nameserver = dns005.ford.com
ford.com nameserver = dns006.ford.com
ford.com nameserver = extdns001.ford.com
ford.com nameserver = extdns002.ford.com
ford.com nameserver = dns005.ford.com
ford.com nameserver = dns006.ford.com
ford.com nameserver = extdns001.ford.com
ford.com nameserver = extdns002.ford.com
dns005.ford.com internet address = 136.8.159.21
dns006.ford.com internet address = 136.8.159.22
extdns001.ford.com internet address = 136.1.7.10
extdns002.ford.com internet address = 136.1.7.11
> ford.com 136.8.159.21
Server: [136.8.159.21]
Address: 136.8.159.21
ford.com MX preference = 10, mail exchanger = mail.mailwatch.com
ford.com MX preference = 10, mail exchanger = mail2.mailwatch.com
ford.com internet address = 136.1.240.21
ford.com nameserver = extdns001.ford.com
ford.com nameserver = dns004.ford.com
ford.com nameserver = dns003.ford.com
ford.com nameserver = extdns002.ford.com
ford.com nameserver = dns005.ford.com
ford.com nameserver = dns006.ford.com
ford.com
primary name server = extdns001.ford.com
responsible mail addr = dnsadmin.ford.com
serial = 2003074466
refresh = 1800 (30 mins)
retry = 900 (15 mins)
expire = 1814400 (21 days)
default TTL = 1800 (30 mins)
ford.com nameserver = extdns001.ford.com
ford.com nameserver = dns004.ford.com
ford.com nameserver = dns003.ford.com
ford.com nameserver = extdns002.ford.com
ford.com nameserver = dns005.ford.com
ford.com nameserver = dns006.ford.com
extdns001.ford.com internet address = 136.1.7.10
dns004.ford.com internet address = 136.1.1.20
dns003.ford.com internet address = 136.2.1.20
extdns002.ford.com internet address = 136.1.7.11
dns005.ford.com internet address = 136.8.159.21
dns006.ford.com internet address = 136.8.159.22⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -