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Which statement about native VLAN traffic is true?

Which statement about native VLAN traffic is true?

PrepAway - Latest Free Exam Questions & Answers

A.
Cisco Discovery Protocol traffic travels on the native VLAN by default.

B.
Traffic on the native VLAN is tagged with 1 by default.

C.
Control plane traffic is blocked on the native VLAN.

D.
The native VLAN is typically disabled for security reasons.

17 Comments on “Which statement about native VLAN traffic is true?”

  4. sathyaprakash says:

    ANS: B is correct

    On the switch, the CDP traffic is always preferred on the lowest VLAN configured. That is, VLAN 1 always, which cannot be deleted from the VLAN database.
    The CDP protocol behaves differently when the switch sends CDP as a tagged packet or untagged packet dependent upon the native VLAN configured on the trunk link.

    http://www.cisco.com/c/en/us/support/docs/network-management/discovery-protocol-cdp/118736-technote-cdp-00.html




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  6. Wendell Odom says:

    This question is about Native VLAN. The native VLAN is the VLAN that is configured for packets that don’t have a tag. The default native VLAN on all Cisco Switches is VLAN 1. It is always enabled by default. These settings can all be changed: That is: you can designate a different VLAN as the native VLAN, disable VLAN 1, etc. Knowing that, we can eliminate D) as the correct answer because it is enabled by default. We can also eliminate B) because Native VLAN packets don’t get tags by default (you can change this). Finally, Control Plane traffic is never blocked on Native VLAN 1, and even if you change the Native VLAN, the control plane traffic still comes across VLAN 1. That eliminated answer C) – leaving A) as the only answer.




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  7. Perry B. says:

    NEW QUESTION 299
    Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP does not require dedicated gateway tunnels, and can pass through existing IPV4 NAT gateways?

    A. dual stack XX
    B. dynamic
    C. Teredo
    D. Manual 6 to 4

    (Corrects a typo for alternative “C.”.)




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  8. Khurram says:

    3) This question is about Native VLAN. The native VLAN is the VLAN that is configured for packets that don’t have a tag. The default native VLAN on all Cisco Switches is VLAN 1. It is always enabled by default. These settings can all be changed: That is: you can designate a different VLAN as the native VLAN, disable VLAN 1, etc. Knowing that, we can eliminate D) as the correct answer because it is enabled by default. We can also eliminate B) because Native VLAN packets don’t get tags by default (you can change this). Finally, Control Plane traffic is never blocked on Native VLAN 1, and even if you change the Native VLAN, the control plane traffic still comes across VLAN 1. That eliminated answer C) – leaving A) as the only answer.




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  9. Ron says:

    Typical Cisco trick question.
    A is correct. CDP only travels in the “Native Vlan” by default. Yes out of the box it is VLAN 1. However the Native Vlan can be changed.

    B is incorrect because traffic (on any vlan) is NOT tagged until the switch is configured to tag the vlan. The question didn’t say that tagging was enable.

    I personally think D. is also correct. I am sure that is stated in one of the Cisco Press books.




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    1. dr seuss says:

      fc translates to 11111101 idiot. unique local is fc00 through fd00. fd is 11111110 answer = B. even though the answers are all missing a bit. also you cant assume its D (as in they purposefully missed a 0 on the end and meant 11111110) because the leading 0 is necessary to define the binary number. its B.




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  12. braindumps says:

    NO.256Which Layer 1 devices can be used to enlarge the area covered by a single LAN segment?
    (Choose two.)
    A. switch
    B. router
    C. NIC
    D. hub
    E. repeater
    F. RJ-45 transceiver
    Answer: D,E

    NO.257What is the effect of using the service password-encryption command?
    A. Only the enable password will be encrypted.
    B. Only the enable secret password will be encrypted.
    C. Only passwords configured after the command has been entered will be encrypted.
    D. It will encrypt the secret password and remove the enable secret password from the
    configuration.
    E. It will encrypt all current and future passwords.
    Answer: E

    Explanation:
    Encryption further adds a level of security to the system as anyone having access to the database ofpasswords cannot reverse the process of encryption to know the actual passwords which isn’t the case if the passwords are stored simply.

    NO.258 A switch has 48 ports and 4 VLANs. How many collision and broadcast domains exist on the switch (collision, broadcast)?
    A. 4, 48
    B. 48, 4
    C. 48, 1
    D. 1, 48
    E. 4, 1
    Answer: B

    NO.259 Which method does a connected trunk port use to tag VLAN traffic?
    A. IEEE 802 1w
    B. IEEE 802 1D
    C. IEEE 802 1Q
    D. IEEE 802 1p
    Answer: C

    NO.300 In which situation would the use of a static route be appropriate?
    A. To configure a route to the first Layer 3 device on the network segment.
    B. To configure a route from an ISP router into a corporate network.
    C. To configure a route when the administrative distance of the current routing protocol is too low.
    D. To reach a network is more than 15 hops away.
    E. To provide access to the Internet for enterprise hosts.
    Answer: B

    NO.301 When enabled, which feature prevents routing protocols from sending hello messages on an interface’?
    A. virtual links
    B. passive-interface
    C. directed neighbors
    D. OSPF areas
    Answer: B




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