CDP & LLDP Questions
| CDP Quick Summary
Cisco Discovery Protocol (CDP) is a Layer 2 protocol that runs on Cisco devices and enables networking applications to learn about directly connected devices nearby. The information contained in Cisco Discovery Protocol advertisements varies based on the type of device and the installed version of the operating system. Some of the information that Cisco Discovery Protocol can learn includes: To enable the CDP, use the cdp run command in global configuration mode. To disable CDP, use the no form of this command. CDP is enabled by default at the global level and on each supported interface to send or receive CDP information. To disable CDP only on one interface, use the “no cdp enable” command under that interface. For example: Router(config)#interface e0/0 LLDP Quick Summary Link Layer Discovery Protocol (LLDP) is a industry standard protocol that allows devices to advertise, and discover connected devices, and there capabilities (same as CDP of Cisco). To enable it on Cisco devices, we have to use this command under global configuration mode: Sw(config)# lldp run Note: LLDP is disabled by default. Other LLDP commands: + lldp holdtime seconds: Specify the amount of time a receiving device should hold the information from your device before discarding it To disable LLDP globally, use the command “no lldp run”. To disable LLDP on an interface, use these two commands under interface mode: To enable receiving and transmitting the LLDP packets on a specific interface, use “lldp transmit” and “lldp receive” commands under that interface. |
Question 1
Question 2
Explanation
If a neighbor has no IP address on an interface enabled with Cisco Discovery Protocol, the IP address of another interface will be updated as IP address for the non-IP address interface.
Question 3
Explanation
+ lldp holdtime seconds: Specify the amount of time a receiving device should hold the information from your device before discarding it
+ lldp reinit delay: Specify the delay time in seconds for LLDP to initialize on an interface
+ lldp timer rate: Set the sending frequency of LLDP updates in seconds
Question 4
Explanation
Link Layer Discovery Protocol (LLDP) is a industry standard protocol that allows devices to advertise, and discover connected devices, and there capabilities (same as CDP of Cisco). To enable it on Cisco devices, we have to use this command under global configuration mode:
Sw(config)# lldp run
Question 5
Question 6
Explanation
+ lldp holdtime seconds: Specify the amount of time a receiving device should hold the information from your device before discarding it
+ lldp reinit delay: Specify the delay time in seconds for LLDP to initialize on an interface
+ lldp timer rate: Set the sending frequency of LLDP updates in seconds
Question 7
Question 8
Explanation
Use the switch(config)#lldp port-description option to specify the port description TLV messages.
Questions are not showing…?
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9tut, I paid for premium for CCNA to study for exam, but only but I can only see the explanations and not the questions can you help me in this matter.
Anonymous
January 4th, 2021
9tut, I paid for premium for CCNA to study for exam, but only but I can only see the explanations and not the questions can you help me in this matter.
@Bgibby: If your problem still exists, please send an email to support@9tut.com with your username so that we can check for you.
There is an error on Q2, the true answer is B
There is an error on Q2, the true answer is B – I just confirmed that with another links
Q2, The answer is B
Q2: I rectify myself, from cisco reference:
“If a neighbor has no IP address on an interface enabled with Cisco Discovery Protocol, the IP address of another interface will be updated as IP address for the non-IP address interface.”
So the correct answer is C.
Packet Tracer not work well probably.
Hey man, how are you? Is possible that yoou send the questions with the answer fot the next exam of cisco?
@9tut, Is Q2 correct?
Q2
I would think its CDP operates normally, but it cannot provide IP address information for that neighbor
CDP works on layer 2 that means it doesnt require an IP address of the neighbor device to collect its information
there is a mistake in question 2 , the answer should be B
would there be new questions coming soon, seem it was updated a year ago
Question 2 is C:
enviroment:
switch A swicth B
Truk: allowed vlan 1,10,20,30,40
int SW A= fa0/1
int SW B = fa0/20
you will configure SWICTH B:
vlan 10
name test
interface vlan 10
192.168.10.1
no shut
ip default-gateway 192.168.10.254
cdp RUN
————
SWICTH A:
cdp run
—————————————–
please verify that you can see from SWICTH A a IP address of Interface vlan 10 and not for Interface fa0/20 (empty)
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Question 2
Question 2 correct answer is B. I check it with cisco packet tracer
and referred and to this https://itexamanswers.net/question/in-a-cdp-environment-what-happens-when-the-cdp-interface-on-an-adjacent-device-is-configured-without-an-ip-address
@9tut could you confirm it ?
Wrong i test it on gns3 and cdp used IP from another interface so my correction is wrong
@9tut ignore it
Question 1
How can the Cisco Discovery Protocol be used?
A. to allow a switch to discover the devices that are connected to its ports
B. to determine the hardware platform of the device
C. to determine the IP addresses of connected Cisco devices
D. all of the above
B. to determine the hardware platform of the device
Strange wording to me here. It seems like you would only use CDP to determine the hardware platform of a “cisco connected” device and not “the” device.