What is a DHCP Server and what is its purpose? What is a Broadcast, Unicast, and Multicast address?
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Activity 2: Who would assign an IP address when your computer connects to the network? This is the role of DHCP. First, we are going to do a small role play to mimic DHCP. Each member of the group has a role to play. Assume your group is your local area network (LAN). For example, you could consider a LAN at your home or at our campus or at your workplace. 1. One group member can act as a router with a DHCP server and other three members can act as host devices that try to connect to the network. These host devices could be PCs, printers, and network storage devices. A sample network that you are trying to mimic is shown in the below figure. 2. Assume that all the devices are physical connected as shown in the above figure. Now, your job is to set up the network and establish the connections with the router using DHCP. Each member needs to send/ respond with the correct message following the correct message sequence to establish the connections and to receive an IP address for each host/device. 3. Draw a timing diagram to indicate the sequence of messages that transferred between devices. 4. Next, we are going to implement a DHCP server in Cisco packet tracer and check the DHCP in action. Make sure to take screenshots of the networks you build, analyses, and verifications. Open the packet tracer and implement the following network. You may need to use the same model of the devices shown in the diagram. Today, we are not going to use static IP configuration for the hosts as we are going to check functionalities of DHCP. If you have not watched the video available in Section 5.6 (in Module 5) which provides an overview on how to configure DHCP server in Cisco Packet Tracer, please watch the video before you start the task. Tips: You need to add a module with a fast ethernet port to the router, so that the router can support three LANs as shown in the below network diagram. a. Set up the DHCP server by configuring the network pools, default gateway, and IP address (use the subnets mentioned in the diagram). b. Set up the router by configuring the interfaces and DHCP (use the subnets mentioned in the diagram). c. Set up each host with DHCP to obtain IP configuration and verify the IP address and the default gateway. d. Verify the connectivity between each host in the network.
Akash M.
How and why do we use DHCP? Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to automatically assign IP addresses and other network configuration settings to devices on a network. It eliminates the need for manual IP address configuration, making it easier to manage and scale a network. DHCP works by using a client-server model. When a device (client) connects to a network, it sends a DHCP discover message to the network. The DHCP server receives this message and responds with a DHCP offer, which includes an available IP address and other configuration settings. The client then sends a DHCP request message to the server, indicating its acceptance of the offered IP address. The server acknowledges this request with a DHCP acknowledgement message, and the client configures its network settings accordingly. There are several advantages to using DHCP. Firstly, it simplifies network administration by automating the IP address assignment process. This reduces the risk of human error and saves time compared to manually configuring each device's IP address. Secondly, DHCP allows for efficient use of IP addresses. It uses a lease system, where IP addresses are assigned for a specific period of time. This means that IP addresses can be reused once a lease expires, allowing for better utilization of available addresses. Additionally, DHCP enables centralized management of network configuration settings. By using DHCP, administrators can easily update and distribute changes to network settings, such as DNS server addresses or gateway information, to all devices on the network. In conclusion, DHCP is a crucial protocol for managing IP address assignment and network configuration settings. It simplifies network administration, improves IP address utilization, and enables centralized management of network settings.
Haricharan G.
Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C, and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. What is the source MAC address on the frame at point (3)? What is the destination MAC address on the frame at point (3)? What is the source IP address of the datagram at point (3)? What is the destination IP address of the datagram at point (3)? What is the source MAC address on the frame at point (4)? What is the destination MAC address on the frame at point (4)? What is the source IP address of the datagram at point (4)? What is the destination IP address of the datagram at point (4)?
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