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Asad Ijaz

My Name is Asad Ijaz Khattak and I am the writer and blogger, known for my website "". I have writes about various topics related to technology, networking, and cybersecurity. I am also a Cisco Certified Network Professional (CCNP) and Cisco Certified Network Associate (CCNA). I have written several articles and tutorials on the website which can be used as a learning resource for people interested in networking and cybersecurity. I am the member and Editor of Proudly Team NetworkUstad


  1. DHCPv4 Message Format » Networkustad
    September 28, 2019 @ 3:23 pm

    […] DHCPv4 clients and servers exchange messages for easing IP address information as discussed in the previous lesson. The format of all DHCPv4 message is common. The DHCPv4 message format is based on the BOOTP specification. The DHCP v4 uses UDP port numbers 67 and 68 with BOOTP.  The post 68 is DHCPv4 source port number while the port number 67 is the destination port. DHCP messages contain a special option in the option field that differentiates them from BOOTP messages.  The figure below illustrates the DHCPv4 message format. […]


  2. Configuring a Basic DHCPv4 Server » Networkustad
    September 29, 2019 @ 5:45 pm

    […] Cisco router can be configured as a DHCPv4 server. The DHCPv4 server assigns and manages IPv4 addresses from specified address pools within […]


  3. DHCPv4 Relay » Networkustad
    September 30, 2019 @ 3:27 pm

    […] is now configured the Automatic Private IP Addressing (APIPA). Router0 is not configured as a DHCPv4 server and it cannot forward the broadcast message. The DHCPv4 server is configured but located on […]


  4. Troubleshooting DHCPv4 Problem » Networkustad
    October 3, 2019 @ 2:37 pm

    […] DHCPv4 is the most important topic because of the importance of DHCP services. It is the most important […]


  5. How to Troubleshoot DHCPv4 Problem » Networkustad
    August 27, 2020 @ 5:43 pm

    […] DHCPv4 problem is the most important topic because of the importance of DHCP services. It is the most […]


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