/Computer-Network-LabWork

All the Computer Network Lab Works done during 6th Sem

Computer Network Lab Work Notes

Lab 1

  1. Test TCP/IP Protocol Stack For Windows:
C:\>ping 127.0.0.1 (For IPV4)
C:\>ping ::1 (For IPV6)

For Linux

#ping 127.0.0.1
#ping ::1
  1. check the Mac Address
C:\> ipconfig /all

physical address:

24bit		  24bit
OUI		Device ID
6Hex	    	  6Hex
  1. check the IPAddress Details
C:\> ipconfig /all
#ifconfig

Output:

IPv4 Address. . . . . . . . . . . : 172.16.0.44(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0  
Default Gateway . . . . . . . . . : 172.16.0.1          
DHCP Server . . . . . . . . . . . : 172.16.0.1
  1. Test the internet connectivity
C:\> ping 8.8.8.8
C:\> ping 1.1.1.1
  1. Check the DNS
C:\> ping google.com.np

(If address is translated => ok) 6. Trace Path/ Route

# traceroute google.com.np
# tracepath google.com.np

It does maximum 30Hops Forward Lookup Diagram

  1. Identify the name server This is forward lookup as we go from domain to IP
C:\> nslookup google.com.np

IP Details:

Name:    google.com.np
Addresses:  2404:6800:4007:820::2003
          142.250.193.131

Also you can try: nslookup facebook.com

Output:

Address:  8.8.8.8 

Non-authoritative answer:
Name:    facebook.com
Addresses:  2a03:2880:f12f:183:face:b00c:0:25de
31.13.79.35

Reverse Lookup Syntax:

nslookup <ipaddress>

Example:

nslookup 148.251.213.218

This is backward lookup as we go from IP to server

Identify the IP Details steps:

  1. Go to google search
  2. Enter whois then it will show you necessary details about the IP example:
Do google search of:- whois 103.96.32.1