Exam N10-008 topic 1 question 228 discussion

A relay would be used to forward requests and replies between a DHCP (Dynamic Host Configuration Protocol) server and client. In networking, a relay is a device that receives incoming messages and then forwards them to their destination. In the context of DHCP, a relay is a device that receives DHCP requests from clients on one network and then forwards them to the DHCP server on another network. This is useful when the client and server are not on the same network and cannot communicate directly. The relay helps to ensure that the client can still receive a valid IP address and other configuration information from the server.

GPT picks (A): "To forward requests and replies between a DHCP server and client, the networking component used is (A) Relay. Relay: A DHCP relay agent, also known as a DHCP relay, is used to forward DHCP messages (requests and replies) between DHCP clients and servers that are located on different subnets or networks. The relay agent helps facilitate DHCP communication across network boundaries. (B) Lease: A DHCP lease is the period of time during which a client device is allowed to use an assigned IP address. It specifies how long the client can use the IP address before requesting a renewal. (C) Scope: A DHCP scope is a range of IP addresses that are available for lease to clients within a specific subnet. It defines the pool of addresses from which DHCP clients can obtain IP addresses. (D) Range: While a DHCP range can refer to the set of IP addresses within a DHCP scope, it doesn't directly relate to forwarding requests and replies between a DHCP server and client."

A. Relay.

The correct answer is A. Relay. A DHCP relay agent, also known as a DHCP relay, is used to forward DHCP requests and replies between DHCP clients and servers that are not on the same physical subnet. When a DHCP client is located on a different subnet from the DHCP server, the DHCP relay agent is required to forward the DHCP messages between the client and server. B. Lease is a term used in DHCP to describe the length of time for which an IP address is assigned to a DHCP client. C. Scope is a range of IP addresses that are available for dynamic allocation to DHCP clients. D. Range is a subset of IP addresses within a scope that are available for dynamic allocation to DHCP clients.

The answer is A. A DHCP relay is a device that relays DHCP broadcast requests across broadcast domains so a device in one subnet can receive an IP address configuration from a DHCP server that is located in another subnet. Answer B is incorrect because a lease is the amount of time a device is able to hold and use an IP address before it has to renew the lease with the original lending DHCP servers. A lease does not forward requests and replies between a DHCP server and a client. Answers C and D are incorrect because the scope/range of a DHCP server is the list of IP addresses that a DHCP server is able to hand out to clients. They pertain only to the pool of IP addresses and have nothing to do with the actual forwarding of requests and replies between a DHCP server and a client.

i meant to say A. Relay.

The DHCP relay agent is any TCP/IP host which is used to forward requests and replies between the DHCP server and client when the server is present on a different network. https://www.geeksforgeeks.org/dhcp-relay-agent-in-computer-network/ https://docs.citrix.com/en-us/citrix-sd-wan/current-release/dhcp-server-and-dhcp-relay.html

I going to have to go with Lease on this one: https://www.ibm.com/docs/en/i/7.1?topic=concepts-leases

As DHCP messages are broadcast, these broadcast messages are not forwarded out of subnet by router to other subnets (Assuming that you have more than one subnet). It means you need to have a DHCP server for each of your subnet, which is not practical. The DHCP relay agent receives DHCP Discover and Request messages broadcasted by the PC, and unicasts them directly to the DHCP server. With each of your subnets configured with a relay agent, one DHCP server can cater to all the clients in different subnets. Ref: https://www.examguides.com/Networkplus/network-plus-8.htm

no idea what the correct answer is: but Relay is really when the DHCP server is present on a different network. so it's kind of true. I pick B based on other answer options.

I would go for B bc Sometimes, the DHCP lease process is called the DORA process: Discover, Offer, Request, and Ack. and the DHCP relay agent can be configured to provide forwarding of DHCP traffic between subnets.