A technician manages a DHCP scope but needs to allocate a portion of the scope’s subnet for statically assigned devices. Which of the following DHCP concepts would be BEST to use to prevent IP address conflicts?
A technician manages a DHCP scope but needs to allocate a portion of the scope’s subnet for statically assigned devices. Which of the following DHCP concepts would be BEST to use to prevent IP address conflicts?
To allocate a portion of a DHCP scope’s subnet for statically assigned devices and prevent IP address conflicts, the best DHCP concept to use is an exclusion range. By setting an exclusion range, the DHCP server is instructed not to assign specific IP addresses within a specified range. This guarantees that the IP addresses within the exclusion range can be safely used for devices that require static IP addresses without the risk of conflicts from dynamically assigned addresses.
ANSWER: B DHCP Reservations And Exclusions An DHCP exclusion is an address or range of addresses taken from a DHCP scope that the DHCP server is not allowed to hand out. For example, if you have set a DHCP server to exclude the address range 192.168.0.1-192.168.0.10 then the only way a computer on your network would get an address of 192.168.0.4 would be if you assigned it statically on that machine. This is because DHCP knows NOT to give this range of IP addresses out. A DHCP reservation is a specific IP addresses that is tied to a certain device through its MAC address. For example, if we have a workstation on the network that requires a certain IP address, but we don’t want to go through to trouble of assigning it statically, then we can create a reservation for it. So if the MAC address of the NIC on the computer is AA-BB-00-FF-CC-AA and we want it to maintain the IP address of 192.168.0.100 then we would create a DHCP reservation under that particular scope saying that the IP address 192.168.0.100 is reserved only for the MAC address AA-BB-00-FF-CC-AA.
"allocate a portion of the scope’s subnet for statically assigned devices" When you would choose C, you would need to create a lot of MAC reservations for devices that never ask the DHCP server for an IP address because they are STATICALLY assigned. When you create en exclusion range of all those statically assigned devices, you only need one exlusion of this entire range. B is the correct answer.
i was thinking C... u just changed my mind thanks
I will have to go with B since its for a portion of the subnet needs to be reserved for some devices and not being reserved to.a.specific device.
This is B. They said scope allocation. As an IT guy I remove addresses from my DHCP scope that are assigned as static to devices. Like 192.168.15-254 with 2-15 being for static set devices.
B. Exclusion range would be BEST to use to prevent IP address conflicts when allocating a portion of a DHCP scope’s subnet for statically assigned devices. Exclusion range allows you to specify a range of IP addresses that the DHCP server should not assign to any clients, including statically assigned devices. By reserving these addresses, you can prevent IP address conflicts between dynamically and statically assigned devices.
There's nothing wrong with the answer provided here (C), so I would go with that. The question is ambiguous, true - the stated goal can be achieved within DHCP (with address reservations) or outside of DHCP (with exclusions and manual assignments). But to say that C is wrong is not appropriate. And as the question is about DHCP concepts, I think that C is a tiny bit closer to being the best answer than B.
C. Address reservation An address reservation is a DHCP feature that allows a DHCP administrator to reserve a specific IP address for a particular client. This ensures that the DHCP server does not assign that IP address to any other client, preventing IP address conflicts. Exclusion range is also a DHCP feature that allows to exclude certain IP addresses from the DHCP scope, but it doesn't guarantee the address will be assigned to a specific client. Dynamic assignment is the usual DHCP feature that assigns IP addresses dynamically to clients as they request one. IP helper is a feature that allows DHCP clients on one subnet to receive DHCP messages from a DHCP server on another subnet.
To prevent IP address conflicts when allocating a portion of a DHCP scope's subnet for statically assigned devices, it is recommended to use the concept of DHCP exclusion ranges. DHCP exclusion ranges allow a DHCP administrator to specify a range of IP addresses within the scope that should not be assigned to DHCP clients. This can be useful in situations where some devices on the network need to be assigned static IP addresses, as it ensures that the statically assigned addresses do not overlap with addresses assigned by the DHCP server. To set up a DHCP exclusion range, the administrator needs to specify the start and end IP addresses of the range, as well as the subnet mask. The DHCP server will then exclude the specified range of addresses from its pool of available addresses, and will not assign them to DHCP clients. By using DHCP exclusion ranges, the technician can ensure that the statically assigned addresses do not conflict with addresses assigned by the DHCP server, and can prevent IP address conflicts on the network.
Involves specifying a range of IP addresses within the DHCP scope that the DHCP server will not assign to devices. By setting an exclusion range, the DHCP server won't hand out these addresses dynamically, allowing you to reserve them for devices with static IP assignments. This is the ideal method when you need to allocate a specific set of addresses within a DHCP scope for static assignment.
I would agree with B being the correct answer here
it is B
I think the key is this : allocate a portion of the scope’s subnet While DHCP reservation can also do the job, exclusion range makes more sense as you can now set static devices using only those range.
The key is "allocate a portion of the scope’s subnet for statically assigned devices" Address reservation is for a single IP Exclusion range removes a group of IPs from DHCP automatic assignment; these can later be turned into reservations on a case by case basis, or statically assigned on the device
I can see why C would be the answer but I can also see why B could be the answer. I would say C.
I think Answer is C. if you assign all your statically device on exclusion. can there be IP conflict occur within that range? if i reserve the IP for particular device. it is always for that device..
According to network+ book: One solution is to configure static assignments, using IP addresses outside the DHCP scope.but here in question mentioned”in DHCP SCOPE”,so it's gonna be Reservation
Correct answer in this particular scenario is C. KEYWORD IS ''statically assigned devices''. Exclusion range is used to reserve a portion of the DHCP scope for manual assignment, not for statically assigned devices.
manual = static when it comes to assigning addresses.