Question

this is 20 marks question so i am expecting brief answer

1. You turned on a school lab PC and decided to check your Facebook account. The connection to facebook.com failed with an error message “No Internet Connection”. In order to check your IP configuration, you went to the command prompt and typed “ipconfig /all”. You observed that the IPv4 address is 169.254.25.10. All other IP settings, network cables, and network connections seem to be fine.

1a) What do you suggest to be the cause of the error message?

1b) What needs to be done to fix this problem?

Answer 1

Answer 1a
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DNS creates dummy interface without IP address so if no router found in the network it may possible that this ip range 169.254 is reserved for dummy ip because of no path found to get the DHCP server who provides IP.

Answer 1b
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Try to flushdns using ipconfig /flushdns or try to set the static IP rather then DHCP server it may possible that DHCP servies are stopped so restart the client and router or server as well to get fresh IP.

Type ipconfig /release press Enter

Type ipconfig / flushdns press Enter

Type ipconfig /renew press Enter

Restart PC

Hold the Windows Key and Press R. Type ncpa.cpl and Click OK. Right Click the Network Adapter in question, and choose Properties -> Uncheck Internet Protocol Version 6 (TCP/IPv6) then click OK.

if you have any doubt then please ask me without any hesitation in the comment section below , if you like my answer then please thumbs up for the answer , before giving thumbs down please discuss the question it may possible that we may understand the question different way and we can edit and change the answers if you argue, thanks :)

Answer 2

 

1. a). Cause of the Error Message :-

The IPv4 address 169.254.25.10 is an Automatic Private IP Address (APIPA), which indicates:

• The PC failed to obtain a valid IP address from a DHCP server

• This typically happens when:

• The DHCP server is down or unreachable

• There's a network configuration issue preventing DHCP communication

• The DHCP scope is exhausted (no available addresses)

 b). Solution to Fix the Problem :-

To resolve this issue, you should:

1. Verify physical connections (though the question states they seem fine)

2. Manually renew the DHCP lease by running these commands in 

3. Command Prompt:

    

   ipconfig /release  
   ipconfig /renew

5. If that fails, check the DHCP service status on the server

6. As a temporary workaround, assign a static IP address (not recommended for school labs):

• IP: 192.168.1.100

• Subnet: 255.255.255.0

• Gateway: 192.168.1.1

• DNS: 8.8.8.8 or the school's DNS server

• Example configuration (assuming school network is 192.168.1.0/24):

• 
  

Key Takeaway:

• The 169.254.x.x address means DHCP failure.

• Solution: Fix DHCP communication or manually configure the IP.