CDP

Question 1

What does CDP stand for?

Answer 1

Cisco Discovery Protocol.

Question 2

What does CDP display?

Answer 2

Physically-connected devices, including their hostname, device model, management IP, and connecting interfaces.

Question 3

What is the industry-standard version of CDP?

Answer 3

LLDP, the link-layer discovery protocol.

Question 4

Why is CDP a security concern?

Answer 4

It provides detailed network information and sends all information in clear-text.

Question 5

What are the default CPD timers?

Answer 5

A hello timer of 60 seconds and a hold timer of 180 seconds.

Question 6

Can CDP be enabled/disabled globally?

Answer 6

Yes, and it can also be enabled/disabled at the interface level.

Question 7

In addition to device information, what else can CDP detect?

Answer 7

VLAN mismatches, MTU size, and PoE levels.

Question 8

What does CDP stand for?

Answer 8

Cisco Discovery Protocol.

Question 9

What is CDP?

Answer 9

CDP is a Cisco Proprietary feature that allows you to see directly connected Cisco devices. It is also used for other communication like POE negotiation.

Question 10

What does LLDP stand for?

Answer 10

Link Layer Discovery Protocol.

Question 11

What is LLDP?

Answer 11

LLDP is industry standard and not proprietary. Allows you to see directly connected hosts.

Question 12

Is LLDP enabled by default?

Answer 12

LLDP is not enabled by default. LLDP is turned on with a similar command to CDP, lldp run.

Question 13

How to disable CDP?

Answer 13

Globally Switch(config)#no cdp run per Interface Switch(config)#no cdp enable

Question 14

Adjust the advertisement interval and holdtime:

Answer 14

cdp timer cdp holdtime

Question 15

Disable CDPv2 advertisements globally:

Answer 15

no cdp advertise-v2

Question 16

Disable logging of duplex mismatches for Ethernet interfaces globally or at the interface:

Answer 16

no cdp log mismatch duplex

Question 17

Specify a source interface for CDP advertisements to ensure CDP reports the desired IP address to neighbors:

Answer 17

cdp source-interface

Question 18

Secure CDP Configuration (cli)

Answer 18

Globally create TLV list: cdp tlv-list name Add the TLVs you wish to filter out to the list, such as ip-prefix or hello-protocol Apply the filter list either globally or at the interface level: cdp filter-tlv-list name Filter lists applied at the interface take precedence over lists applied globally

Question 19

Display global CDP information including timers and v2 status:

Answer 19

show cdp

Question 20

Display information about a specific CDP neighbor (or all neighbors by using *):

Answer 20

show cdp entry {* | device-id}

Question 21

Display L2 encapsulation type and timers of individual interfaces:

Answer 21

show cdp interface [interface]

Question 22

Display information about detected neighbors:

Answer 22

show cdp neighbors [detail] The detail keyword is similar to show cdp entry and displays more information about the CDP neighbors

Question 23

Display the current CDP counters:

Answer 23

show cdp traffic

Question 24

Display the contents of the CDP TLV-list:

Answer 24

show cdp tlv-list

Question 25

Reset the statistics gathered by CDP:

Answer 25

clear cdp counters

Question 26

Remove all neighbors from the CDP neighbor table. Neighbors will be re-discovered during their next advertisement interval.

Answer 26

clear cdp table

Question 27

When should CDP be enabled?

Answer 27

only for trusted Cisco gear, especially phones

Question 28

Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true?

Answer 28

CDP is enabled by default and can be disabled globally with the command no cdp run.

Question 29

A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. The engineer notices only a single neighbor that uses Cisco Discovery Protocol, but it has several routing neighbor relationships. What would cause the output to show only the single neighbor?

Answer 29

The routers are connected via a Layer 2 switch.

Question 30

After the implementation of several different types of switches from different vendors, a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Which vendor-neutral protocol could be used to resolve this issue?

Answer 30

Link Layer Discovery Protocol

Question 31

While doing network discovery using Cisco Discovery Protocol, it is found that rapid error tracking is not currently enabled. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol?

Answer 31

Cisco Discovery Protocol version 2

Question 32

A network engineer has just deployed a non-Cisco device in the network and wants to get information about it from a connected device. Cisco Discovery Protocol is not supported, so the open standard protocol must be configured. Which protocol does the network engineer configure on both devices to accomplish this?

Answer 32

LLDP

Question 33

Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true?

Answer 33

Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC.

Question 34

Which option lists the information that is contained in a Cisco Discovery Protocol advertisement?

Answer 34

native VLAN IDs, port-duplex, hardware platform

Question 35

Which statement about LLDP-MED is true?

Answer 35

LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices.

Question 36

Which option describes a limitation of LLDP?

Answer 36

LLDP cannot provide information about VTP.

Question 37

What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements?

Answer 37

60 seconds

Question 38

What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements?

A. 30 seconds

B. 60 seconds

C. 120 seconds

D. 300 seconds

Answer 38

B. 60 Sec.