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Exam 70-741 topic 2 question 17 discussion

Actual exam question from Microsoft's 70-741

Question #: 17
Topic #: 2

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
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You are implementing a secure network. The network contains a DHCP server named Server1 that runs Windows Server 2016.
You create a DHCP allow filter that contains all of the computers on the network that are authorized to receive IP addresses.
You discover that unauthorized computers can obtain an IP address from Server1.
You need to ensure that only authorized computers can receive an IP address from Server1.
Solution: You run the following command: Add-DHCPServerv4Filter ""ComputerName Server1 ""MacAddress * -List Allow
Does this meet the goal?

A. Yes
B. No

Show Suggested Answer

Suggested Answer: A 🗳️

by nomsboms at Oct. 8, 2019, 6:42 a.m.

Comments

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MrRiver

Highly Voted 5 years, 8 months ago

you need to enable filter lists first ... so i guess the command we need to look for is something like: Set-DhcpServerv4FilterList -ComputerName "dhcpserver.contoso.com" -Allow $True This would enabled the allow list ... wich allready cotains mac addresses so you don't need to add entrys with: Add-DhcpServerv4Filter -List Allow -MacAddress "F0-DE-F1-7A-00-5E" -Description "Laptop 09" So "Add-DhcpServerv4Filter" answers should be wrong https://docs.microsoft.com/en-us/powershell/module/dhcpserver/add-dhcpserverv4filter?view=win10-ps https://docs.microsoft.com/en-us/powershell/module/dhcpserver/set-dhcpserverv4filterlist?view=win10-ps

upvoted 6 times

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nomsboms

Highly Voted 5 years, 8 months ago

You create a DHCP allow filter that contains all of the computer.... So, Answer is NO, because we already have this filter

upvoted 5 times

Neostar

4 years, 5 months ago

"You create a DHCP allow filter that contains all of the computers on the network that are authorized to receive IP addresses" does not mean the list has the mac addresses of the computers, as they can use the parameter "-ComputerName" instead of -MacAddress which allowed unauthorized computers (with the same name) to obatin IP addresses. The answer is correct, the cmdlet is required to add the computers mac addresses

upvoted 1 times

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Neostar

Most Recent 4 years, 5 months ago

The answer is correct, the cmdlet is required to add the computers mac addresses to the filter. "You create a DHCP allow filter that contains all of the computers on the network that are authorized to receive IP addresses" does not mean the filter has the mac addresses of the computers, as they can use the parameter "-ComputerName" instead of -MacAddress which can allow unauthorized computers (with the same name) to obatin IP addresses.

upvoted 2 times

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jam7272

4 years, 9 months ago

...of course that doesn't mean the answer is correct. It is wrong still. Because you need to activate the filter first using Set-

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jam7272

4 years, 9 months ago

You can in fact use wildcards with MAC address filtering and the Add-DhcpServerv4Filter. I know the documentation says you can't use wildcards. But I just tested it and the entry appears correctly in DHCP > Filters > Deny after I run this command.... Add-DhcpServerv4Filter -List Deny -MacAddress "AA-BB-*" -Description "WildcardPC"

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jam7272

4 years, 9 months ago

You cannot use wildcards - Accept wildcard characters: False for -MacAddress as per this page https://docs.microsoft.com/en-us/powershell/module/dhcpserver/add-dhcpserverv4filter?view=win10-ps

upvoted 1 times

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Kamikazekiller

4 years, 11 months ago

Answer is NO.

upvoted 3 times

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DMc

4 years, 11 months ago

No because the -MacAddress * is using the asterisks wildcard and definition of the Add-DhcpServerv4Filter cmdlet says -MacAddress must be a string value and that wildcard usage is "False"

upvoted 2 times

pepeold

4 years, 7 months ago

just for information you can use -MacAddress BBFF* you can't use -MacAddress *

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khalid86

5 years, 2 months ago

Answer is NO. Because DHCP filter is already available. Only need to make Allow list enabled.

upvoted 3 times

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stefano1856

5 years, 2 months ago

The answer should be NO becouse wildchars are not allowed with -MaccAdress switch also this command does not specify the state of the Allow filter https://docs.microsoft.com/en-us/powershell/module/dhcpserver/add-dhcpserverv4filter?view=win10-ps

upvoted 3 times

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Ario

5 years, 4 months ago

Answer is correct

upvoted 2 times

stefano1856

5 years, 2 months ago

a nonsense comment

upvoted 8 times

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ve22

5 years, 2 months ago

You are stating the true or false in your comments, without any explanation?!

upvoted 6 times

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rohw

5 years, 4 months ago

I think the answer is NO, because MacAddress * would allow any computer with a MAC address to receive an IP address. With specific MAC addresses listed, it would work, as long as the original filter was removed or disabled, since it is allowing some unauthorized computers.

upvoted 5 times

lbs

5 years, 3 months ago

Agree. Answer should be No

upvoted 2 times

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