New CCNA – DHCP Questions
Question 1
When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two)
A. network or subnetwork IP address
B. broadcast address on the network
C. IP address leased to the LAN
D. IP address used by the interfaces
E. manually assigned address to the clients
F. designated IP address to the DHCP server
Answer: A B
Explanation
Network or subnetwork IP address (for example 11.0.0.0/8 or 13.1.0.0/16) and broadcast address (for example 23.2.1.255/24) should never be assignable to hosts. When try to assign these addresses to hosts, you will receive an error message saying that they can’t be assignable.
Question 2
Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two)
A. Set the IP gateway to be used by the network.
B. Perform host discovery used DHCPDISCOVER message.
C. Configure IP address parameters from DHCP server to a host.
D. Provide an easy management of layer 3 devices.
E. Monitor IP performance using the DHCP server.
F. Assign and renew IP address from the default pool.
Answer: C F
Question 3
Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?
A. The address is removed from the pool until the conflict is resolved.
B. The address remains in the pool until the conflict is resolved.
C. Only the IP detected by Gratuitous ARP is removed from the pool.
D. Only the IP detected by Ping is removed from the pool.
E. The IP will be shown, even after the conflict is resolved.
Answer: A
Question 4
How does a DHCP server dynamically assign IP address to host?
A. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B. Addresses are assigned for a fixed period of time. At the end of period, a new quest for an address must be made, and another address is then assigned.
C. Addresses are leased to host. A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D. Addresses are permanently assigned so that the host uses the same address at all times.
Answer: C
Question 5
Which statement is correct regarding the operation of DHCP?
A. A DHCP client uses a ping to detect address conflicts.
B. A DHCP server uses a gratuitous ARP to detect DHCP clients.
C. A DHCP client uses a gratuitous ARP to detect a DHCP server.
D. If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.
E. If an address conflict is detected, the address is removed from the pool for an amount of time configurable by the administrator.
F. If an address conflict is detected, the address is removed from the pool and will not be reused until the server is rebooted.
Answer: D
Explanation
An address conflict occurs when two hosts use the same IP address. During address assignment, DHCP checks for conflicts using ping and gratuitous ARP. If a conflict is detected, the address is removed from the pool. The address will not be assigned until the administrator resolves the conflict.
(Reference: http://www.cisco.com/en/US/docs/ios/12_1/iproute/configuration/guide/1cddhcp.html)
q 1 in todays exam
Don’t think the answers to question 2 are correct – it should be A and F to my opinion. DHCP does assign DG to all the hosts on the network (if so configured and usually it is). While saying it configure IP address parameters is not technically correct – IP address does not have parameters beyond just being an IP address. IP protocol setting does have various parameters.
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Vadimz, I don’t think that answer should ever be A, because we as the cisco tech are supposed to assign the gateway for a device, and route the traffic in the way we want to. I could be wrong. Just saying.
Vadimz, I don’t think that answer should ever be A, because we as the cisco tech are supposed to assign the gateway for a device, and route the traffic in the way we want to. I could be wrong. Just saying
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Q2 online quiz only check for one of the answers, but 2 are expected.
In question 2: C is correct and clearly much better answer than A. It says “Configure IP address parameters from DHCP server to a host”. As the name of DHCP implies ” Dynamic Host Configuration Protocol”, Answer C clearly states that DHCP configures the ip parameter of hosts. So what are those ip parameters?? Well on ccna level it would be the default-gateway (or the ip gateway, which is stated in letter A) from the command: default-router X.X.X.X and also dns-server. I know there are other ip parameter configuration that DHCP does, but i’m just a starter in cisco world :D .. But that’s how I understand it. Hope it helps :D
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Please verifying question
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Answer is 2 but the animation only valid as correct when only one response is selected
@9tut
Please verifying question
Which two tasks does the Dynamic Host Configuration Protocol perform?(Choose two)”
Answer is 2 but the animation only valid as correct when only one response is selected
@Maclaurin: Thanks for your detection. We have just fixed it!
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Q2,4 were in the today exam
Q4 was in exam today
Question 1-2-5 were in the exam recently
Think about Question 2 for a minute. I just realised this.
Which two tasks does the -Dynamic Host Configuration Protocol- perform?
– The question asks what the -actual protocol- does, not what types of services a DHCP-server can provide etc.
The -actual protocol- doesn’t set the default gateway, as previously stated by someone.
The default gateway is set by the -administrator-. The protocol then uses that information to “Configure IP address parameters from DHCP server to a host.” and “Assign and renew IP address from the default pool.”
I think this is one of those sneaky Cisco-type questions that may seem clear at first glance, but once you read the question a few times, you realise they are messing with your head.
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