Network Troubleshooting

ipconfig
ping
tracert
nslookup

IPconfig

ipconfig: information gathering: ip address, your router's ip address, your DNS server ip address, DHCP server iP address (ipconfig /all),

Ping

ping: allows you to send a SIGNAL to another Device on the NETWORK to see if it is ACTIVE
try:
1. ping your router a.k.a gateway a.k.a default router.
2. ping other PC.
3. ping outside the network PC.

Tracert

Tracert let's you see, the step-by-step route a packet takes to the destination you specify.

You can also use the term HOPS instead of routers. So, if it takes 10 routers to get to google.com, you can instead say. "it took 10 hops".

NSLOOKUP

This command will fetch the DNS records for a given domain name or for a given IP address. Remember the IP address and domain names are stored in DNS servers, so the nslookup command cause you to query the DNS Record to gather information.

8.8.8.8 --> google-public-dns-a.google.com

Terdiri dari:
1. Interactive mode
2. Non-interactive mode

Non-authoritative : non-your DNS server reply.

ls -a

Record type Name server

1. CNAME
Nickname; alias for a machine.
Name:
Hostname:

2. A record
Informasi yang butuh:
1. Name:
2. Address:

3. SOA record
Data yang dibutuhkan
1. Name :
2. Primary server name:
3. Minimum T T L:
4. Retry time:
5. Mail Box:
6. Refresh Time:
7. Expiry Time:

4. NS record
Data yang dibutuhkan
1. Name
2. Server name

IANA list of root server DNS
IANA list of root server DNS