DHCP Group of Four Questions
Refer to the exhibit. Using the information shown, answer the question
Question 1:
All hosts in the networks have been operational for several hours when the DHCP server goes down. What happens to the hosts that have obtained service from the DHCP server?
A – The hosts will not be able to communicate with any other hosts.
B – The hosts will continue to communicate normally for a period of time.
C – The hosts will be able to communicate with hosts outsides their own network
D – The hosts will only be able to communicate with other hosts by IP address not by hostname
Answer: B
Explanation:
DHCP often uses dynamic allocation mechanism to save IP addresses, which assigns an IP address to a client for a limited period of time. So when the DHCP server goes down, that client can still use the allocated IP address for a period of time
Question 2:
What is the purpose of the DHCP server?
A – to provide storage for email
B – to translate URLs to IP addresses
C – to translate IPv4 addresses to MAC addresses
D – to provide an IP configuration information to hosts
Answer: D
Explanation:
The main purpose of the DHCP server is to provide IP configuration parameters to hosts such as the default gateway, domain name, Domain Name System (DNS) server…
Question 3:
How is the message sent from a PC2 when is first powers on and attempts to contact the DHCP Server?
A – Layer 3 unicast
B – Layer 3 broadcast
C – Layer 3 multicast
D – Without any Layer 3 encapsulation
Answer: B
Explanation:
When a client boots up for the first time, it transmits a DHCPDISCOVER message on its local physical subnet. Because the client has no way of knowing the subnet to which it belongs, the DHCPDISCOVER is an all-subnets broadcast (destination IP address of 255.255.255.255, which is a layer 3 broadcast address). The client does not have a configured IP address, so the source IP address of 0.0.0.0 is used.
Question 4:
What is the default behavior of R1 when PC1 requests service from DHCP server?
A – Drop the request
B – Broadcast the request to R2 and R3
C – Forward the request to R2
D – Broadcast the request to R2, R3 and ISP
Answer: A
Explanation:
When PC1 requests service from DHCP server (for example, it requests an IP address), it sends a broadcast packet. But R1 router, by default, will not forward broadcast packet and drop it.
For your information, if you want to use the DHCP server from another network (like in this case) you can use the ip helper-address command which will make the router forward UDP broadcasts.
In the real exam you will be taken to a LAB simulation environment but it is, in fact, just a group of 4 multi-choice questions!
Hi,
Sanjeev here need to no is there any who has appeared the exam recently i.e in Jan 2012,
Bcoz i heard that Fees has been increased and there are 5 SIM’s.Wanted to know the pattern and marks allotted for SIM.
Please could anybody tell me. Mail me at sanjeevhaveri@gmail.com
Thanking You,
Yes fee has been increased to 295 but I only seen 2 sims
Hi
I m planning to gv it next week. Plz update me on any changes.
Is thr any change in thr pattern ?
Hi
I m planning to gv it next week. Plz update me on any changes.
Is thr any change in the pattern ?
Given that Host A and Host B are in different networks. When Host A is trying to communicate with
Host B, which step will Host A take first?
Given that Host A and Host B are in different networks. When Host A is trying to communicate with
Host B, which step will Host A take first?
A. Send a TCP SYN and wait for the SYN ACK with the IP address of Host B.
B. Drop the data.
C. Create an ARP request to get a MAC address for Host B.
D. Send the data frames to the default gateway.
@deleted
D – send the frames to the default gateway
@xallax
I’m little bit confused with this kind of questions.
I understand that best answer would be D–send the frames to the default gateway,
but how should we know if host A has been already communicating with host B (and in that case, A knows destination MAC address)?
@jelenna
the pc just does a comparison at the network layer.
my IP is on this network. their IP is on that network.
knowing that, the pc sends the frames towards the default gateway straight away.
the pc doesnt not have to know the MAC of the destination pc.
MACs are used on the same network, IPs are needed to get from one network to another
****
ok, tell you what. if you’re running windows then…
hold the windows key (between ctrl and alt on most keyboards) and press R
now type in “cmd”, press enter
a black ms-dos-ish window appears.
type in “arp -a” and hit enter
this command displays the known MACs for all the devices on the local network that your computer “talked” to.
you will for sure not see the MAC of the server on which this website is hosted :)
computers dont need MACs to talk to one another if they’re not on the same network.
@xallax
Thanks on your explanation, now it’s clear.
Hi 9tut… Hi Guys! Can you please help me… I will take exam this Feb. Please send me latest dump so that I will have an idea for the exam.. rico.blake@ymail.com
Thanks Guys!
Hi…
Can you please send me the latest CCNA Q paper to ma mail id so that i could prepare . I’m planning to take the exam in 1 or 2 months
My mail id is kmvenkatesh04@gmail.com
Hi guys .
I will take ccna exam on next week. if any of u guyz have latest versions of memory dumps could you please send it to this mail…it will be so..helpfull..
miyuru.npd@gmail.com
thanx..