(H9) Day18 Troubleshooting part5 Network Connectivity Issues, Test Connectivity

20240725 150010
Ping: tells you’re device able to communicate to the destination device
Used to test connectivity between the devices
From PC-A , Ping to PC-B
At PC-A: cmd
ping 10.0.0.2
Reply from 10.0.0.2,......
Means PC-A to PC-B, PC-B to PC-A connectivity is there

Networking Issue

Unable to communicate PC/Laptop in same network

Internet not working

Unable to connect to Wi-Fi

Configure Wi-Fi

Troubleshooting using OSI Model
Application –
Presentation - make sure protocols over ssl/tsl or not
Session –
Transport – firewall
Network - ip address
Datalink
Physical – connectivity


Search/Run – ncpa.cpl


Select device , right click Properties
If Device not Working , Update Drivers, or Uninstall drivers & restart PC

Test connectivity between PC1 to PC2
From PC1
Ping PC2’ip
cmd: ping 10.0.0.12
Replay from 10.0.0.12 —ping success – no issue – connectivity
Destination host unreachable – ping failed – issue
Request timed out – ping failure – issue

ping 172.16.194.85
Pinging 172.16.194.85 with 32 bytes of data:
Reply from 172.16.194.85: bytes=32 time=8ms TTL=64
Reply from 172.16.194.85: bytes=32 time=3ms TTL=64
Reply from 172.16.194.85: bytes=32 time=2ms TTL=64
Reply from 172.16.194.85: bytes=32 time=2ms TTL=64
Ping statistics for 172.16.194.85:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 8ms, Average = 3ms

ping 172.16.194.90
Pinging 172.16.194.90 with 32 bytes of data:
Reply from 172.16.194.59: Destination host unreachable.
Reply from 172.16.194.59: Destination host unreachable.
Reply from 172.16.194.59: Destination host unreachable.
Reply from 172.16.194.59: Destination host unreachable.
Ping statistics for 172.16.194.90:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

ipconfig
Wireless LAN adapter Wi-Fi:
IPv4 Address. . . . . . . . . . . : 172.16.194.59
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 172.16.192.1

ping 172.17.194.85
Pinging 172.17.194.85 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 172.17.194.85:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
—------------------------
Check IP Address of Your Device and Other Device
If both are in same LAN , so both must be in same ip network (Network Portion must be same)
Either of device IP Address no conflict (two are more devices having same IP)
Make sure destination device available and connected
Make sure you use correct IP Address and Subnet Mask
Check Default Gateway IP address
Ping to Default gateway ip address - tells from your PC upto Router path is clear

ping 172.16.192.1
Pinging 172.16.192.1 with 32 bytes of data:
Reply from 172.16.192.1: bytes=32 time=1ms TTL=64
Reply from 172.16.192.1: bytes=32 time=5ms TTL=64
Reply from 172.16.192.1: bytes=32 time=4ms TTL=64
Reply from 172.16.192.1: bytes=32 time=1ms TTL=64
Ping statistics for 172.16.192.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 5ms, Average = 2ms
–
Request Time out – built-in firewall , default gateway, wrong ip address, remote/destination device not available
Destination host unreachable - wrong ip address, remote/destination device not available,
-