• Recent Posts

  • AmazonExam

  • Braindumps

    Easy Pass Exams!
  • Testking

    Easy Pass Exams!
  • ExamCollection

    Easy Pass Exams!
  •  

    HOT 70-410 Exam VCE Dumps >> Free Download

    HOT 70-411 Exam VCE Dumps >> Free Download

    HOT 70-412 Exam VCE Dumps >> Free Download

    HOT 70-413 Exam VCE Dumps >> Free Download

    HOT 70-414 Exam VCE Dumps >> Free Download

    HOT 70-415 Exam VCE Dumps >> Free Download

    HOT 70-416 Exam VCE Dumps >> Free Download

    HOT 70-417 Exam VCE Dumps >> Free Download

    NEW 70-432 Exam VCE Dumps >> Free Download

    NEW 70-448 Exam VCE Dumps >> Free Download

    NEW 70-457 Exam VCE Dumps >> Free Download

    NEW 70-458 Exam VCE Dumps >> Free Download

    NEW 70-459 Exam VCE Dumps >> Free Download

    HOT 70-460 Exam VCE Dumps >> Free Download

    HOT 70-461 Exam VCE Dumps >> Free Download

    HOT 70-462 Exam VCE Dumps >> Free Download

    HOT 70-463 Exam VCE Dumps >> Free Download

    HOT 70-464 Exam VCE Dumps >> Free Download

    HOT 70-465 Exam VCE Dumps >> Free Download

    HOT 70-466 Exam VCE Dumps >> Free Download

    HOT 70-467 Exam VCE Dumps >> Free Download

    HOT 70-469 Exam VCE Dumps >> Free Download

    NEW 70-470 Exam VCE Dumps >> Free Download

    NEW 70-480 Exam VCE Dumps >> Free Download

    NEW 70-481 Exam VCE Dumps >> Free Download

    NEW 70-482 Exam VCE Dumps >> Free Download

    HOT 70-483 Exam VCE Dumps >> Free Download

    NEW 70-484 Exam VCE Dumps >> Free Download

    NEW 70-485 Exam VCE Dumps >> Free Download

    NEW 70-486 Exam VCE Dumps >> Free Download

    NEW 70-487 Exam VCE Dumps >> Free Download

    HOT 70-488 Exam VCE Dumps >> Free Download

    NEW 70-489 Exam VCE Dumps >> Free Download

    NEW 70-490 Exam VCE Dumps >> Free Download

    NEW 70-491 Exam VCE Dumps >> Free Download

    NEW 70-492 Exam VCE Dumps >> Free Download

    NEW 70-494 Exam VCE Dumps >> Free Download

    NEW 70-496 Exam VCE Dumps >> Free Download

    NEW 70-497 Exam VCE Dumps >> Free Download

    NEW 70-498 Exam VCE Dumps >> Free Download

    NEW 70-499 Exam VCE Dumps >> Free Download

    NEW 70-511 Exam VCE Dumps >> Free Download

    NEW 70-513 Exam VCE Dumps >> Free Download

    NEW 70-515 Exam VCE Dumps >> Free Download

    NEW 70-516 Exam VCE Dumps >> Free Download

    NEW 70-517 Exam VCE Dumps >> Free Download

    HOT 70-532 Exam VCE Dumps >> Free Download

    HOT 70-533 Exam VCE Dumps >> Free Download

    HOT 70-534 Exam VCE Dumps >> Free Download

    NEW 70-573 Exam VCE Dumps >> Free Download

    NEW 70-576 Exam VCE Dumps >> Free Download

    NEW 70-640 Exam VCE Dumps >> Free Download

    NEW 70-642 Exam VCE Dumps >> Free Download

    NEW 70-646 Exam VCE Dumps >> Free Download

    NEW 70-659 Exam VCE Dumps >> Free Download

    NEW 70-662 Exam VCE Dumps >> Free Download

    NEW 70-663 Exam VCE Dumps >> Free Download

    NEW 70-667 Exam VCE Dumps >> Free Download

    NEW 70-668 Exam VCE Dumps >> Free Download

    NEW 70-673 Exam VCE Dumps >> Free Download

    HOT 70-680 Exam VCE Dumps >> Free Download

    NEW 70-685 Exam VCE Dumps >> Free Download

    NEW 70-686 Exam VCE Dumps >> Free Download

    NEW 70-687 Exam VCE Dumps >> Free Download

    HOT 70-688 Exam VCE Dumps >> Free Download

    NEW 70-689 Exam VCE Dumps >> Free Download

    NEW 70-692 Exam VCE Dumps >> Free Download

    NEW 70-694 Exam VCE Dumps >> Free Download

    NEW 70-695 Exam VCE Dumps >> Free Download

    NEW 70-696 Exam VCE Dumps >> Free Download

    NEW 70-697 Exam VCE Dumps >> Free Download

    NEW 70-980 Exam VCE Dumps >> Free Download

    NEW 70-981 Exam VCE Dumps >> Free Download

    NEW 74-335 Exam VCE Dumps >> Free Download

    NEW 74-338 Exam VCE Dumps >> Free Download

    NEW 74-343 Exam VCE Dumps >> Free Download

    NEW 74-344 Exam VCE Dumps >> Free Download

    HOT 74-409 Exam VCE Dumps >> Free Download

    NEW 74-674 Exam VCE Dumps >> Free Download

    NEW 74-678 Exam VCE Dumps >> Free Download

    HOT 74-697 Exam VCE Dumps >> Free Download

    NEW 77-427 Exam VCE Dumps >> Free Download

  • « | Main | »

    CCIE R&S 350-001 Q&As – Implement Spanning Tree Protocol (STP)(11-15)

    By admin | June 18, 2014

    Tagged with:

    Section 1 – Implement Spanning Tree Protocol (STP)

    QUESTION 11
    Why does RSTP have a better convergence time than 802.1D?
    A.    it is newer
    B.    it has smaller timers
    C.    it has less overhead
    D.    it is not timer-based
    Answer: D

    Explanation:
    http://blog.ine.com/wp-content/uploads/2010/04/understanding-stp-rstp-convergence.pdf

    QUESTION 12
    Under which two circumstances would an RSTP bridge flush its CAM table? (Choose two.)
    A.    upon a port state change
    B.    upon receiving a topology change notification
    C.    when transitioning from discarding to forwarding
    D.    when transitioning from forwarding to discarding
    E.    only when changing from listening to discarding
    F.    when CAM resources have been completely used up
    Answer: BC
    Explanation:
    First, the goal of RSTP is fast re-convergence. Since ports are assumed to transition to forwarding
    relatively fast, simply increasing MAC address aging speed is not enough. Thus, when a topology change is detected, RSTP instructs the bridge to flush all MAC address table entries. With Ethernet, this process results in unconstrained
    flooding until the moment MAC addresses are re-learned. The bridge detecting a topology change sets the TC (Topology Change) bit in all outgoing BPDUs and starts sending BPDUs with the TC bit set upstream through the root port as well.
    This marking lasts for TCWhile=2xHelloTime seconds and allows the detecting bridge the start the flooding process.

    QUESTION 13
    Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D?
    A.    802.1D bridges do not relay BPDUs.
    B.    802.1w bridges do not relay BPDUs.
    C.    802.1D bridges only relay BPDUs received from the root.
    D.    802.1w bridges only relay BPDUs received from the root.
    Answer: C
    Explanation:
    in STP only the root port injects BPDUs to the network ,while in RSTP all the bridges that participates in the tree generates BPDUs.

    QUESTION 14
    You have done a partial migration from 802.1D STP to 802.1w STP. Which of the following is true?
    A.    802.1D and 802.1w interoperate only when the 802.1D STP domain supports rapid convergence.
    B.    Ports leading to 802.1D devices will run in compatibility mode, while the rest of the ports will run in 802.1w mode.
    C.    This is an invalid configuration and a partial migration cannot be done.
    D.    The bridge timers will be set to match the 802.1D devices.
    E.    A secondary root bridge will always be populated within the 802.1D domain.
    F.    If the root bridge is selected within the 802.1D domain, the whole STP domain will run in 802.1D compatibility mode.
    G.    In partially migrated 802.1w networks, it is recommended to keep the STP diameter below 4.
    Answer: B
    Explanation:
    IEEE 802.1w RSTP is designed to be compatible with IEEE 802.1d STP. Even if all the other devices in your network are using STP, you can enable RSTP on your switch, and even using the default configuration values, your switch will interoperate effectively with the STP devices. If any of the switch ports are connected to switches or bridges on your network that do not support RSTP, RSTP can still be used on this switch. RSTP automatically detects when the switch ports are connected to non-RSTP devices in the spanning tree and communicates with those devices using 802.1d STP BPDU packets.

    QUESTION 15
    Refer to the exhibit. Users from the Engineering VLAN complain that every time Business VLAN users have a network connectivity issue, the Engineering VLAN users usually have problems experiencing slow response or network connectivity problems. After troubleshooting, an unauthorized switch 2 was found. This unauthorized switch has been a regular problem, assuming the root bridge function under the spanning-tree domain and causing the
    Engineering VLAN to be unstable. Which three of these actions could be suggested to fix the problem?
    A.    Upgrade Spanning Tree Protocol to Rapid Spanning Tree Protocol.
    B.    Change Business VLAN PCs to switch 1 and switch 4.
    C.    Force the root bridge to be switch 2, instead.
    D.    Adjust spanning-tree timers (max-age and forward-delay).
    E.    Shut down all unused ports.
    F.    Use MSTP to separate the Engineering VLAN from the Business VLAN to optimize spanning-tree convergence time within each VLAN
    Answer: AEF

    103 Total Views 1 Views Today

    Topics: Cisco, Exam | Comments Off on CCIE R&S 350-001 Q&As – Implement Spanning Tree Protocol (STP)(11-15)

    Tagged with:

    Comments are closed.