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2021 Sep cisco 400-201:
Q71. Which are the three characteristics of SDR? (Choose three)
A. The logical router can span across chassis.
B. Each logical router has a distinct fabric and system controller module.
C. Owner SDR can be reloaded, without affecting all non-SDRs.
D. The logical router has dedicated route processor.
E. The logical router can share line cards.
F. The fabric and system controller module are shared by all logical routers.
Answer: A,D,F
Q72. What are three main characteristics of mLDP that differ from RSVP-TE? (Choose three.)
A. The LSPs are built from tailend to headend.
B. The LSPs are built from headend to tailend.
C. It supports only P2MP LSPs.
D. It supports both P2MP and MP2MP LSPs.
E. Signaling is periodic.
F. No periodic signaling is performed.
Answer: A,D,F
Explanation: http://www.cisco.com/c/dam/en/us/products/ios-nx-os-software/multicast-label-distribution-protocol-mldp/whitepaper_c11-598929_v1.pdf
Q73. An IS-IS enabled router with multiple IS-IS neighbors is required to have BFD sessions with all neighbors. Which BFD mode should you use when you want to save the overhead of periodic protocol control packets?
A. echo
B. asynchronous
C. demand
D. active
Answer: C
Explanation: https://tools.ietf.org/html/rfc5880#section-3.1 RFC - 5880
Q74. QoS is applied on an outgoing interface as shown below:
What will the QoS result be for egress traffic with an average queue depth of 40 that is marked as DSCP AF32?
A. Traffic will be dropped with a random rate less than the one defined by MPD.
B. All traffic will be tail dropped.
C. Traffic will be dropped with a rate of 1 packet out of 20.
D. Traffic will be dropped with a rate of 1 packet out of 30.
Answer: C
Q75. A network engineer wants to decrease the convergence time of a network that is running integrated IS-IS as an IGP, at the expense of bandwidth and CPU usage. Which two configuration tasks achieve this goal? (Choose two.)
A. Configure the hold time to be 1 second.
B. Configure the hello interval to be minimal.
C. Ensure that hello-padding is disabled.
D. Ensure that the hello multiplier is set to 3.
E. Configure the hello multiplier to be 3.
Answer: B,D
Explanation:
https://books.google.co.in/books?id=u_XOQy4cBkgC&pg=PA184&lpg=PA184&dq=what+is +hello+multiplier+minimal+time+in+integrated+is-is&source=bl&ots=XqDfyO3AVT&sig=NHY0L-k-nhHrg7h6i3RWorttgcE&hl=en&sa=X&ved=0CDAQ6AEwA2oVChMIhfCI5ZXTxwIVQwaOC h3PfQea#v=onepage&q=what%20is%20hello%20multiplier%20minimal%20time%20in%20 integrated%20is-is&f=false
Improve ccie service provider written exam:
Q76. What BGP feature improves on DDOS mitigation by allowing instructions that are more granular and allow for source address, destination, address, L4 details, and packet specifics to be analyzed?
A. RCMD
B. RTBH
C. BGP Flowspec
D. BGPSec
Answer: C
Explanation:
https://supportforums.cisco.com/document/12226726/asr9000xr-understanding-bgp-flowspec-bgp-fs
Q77. Refer to the exhibit.
What is the status of the L2 tunnel between PE1. PE2. and the Layer 2 switches?
A. The Layer 2 tunnel is up, and SW1 becomes the root bridge for VLAN 10.
B. The Layer 2 tunnel is down, due to the ACL that is applied on the PE2 interface.
C. The Layer 2 tunnel is up, but no BPDUs are exchanged unless an extra configuration is applied.
D. The Layer 2 tunnel is down, due to the MTU mismatch between SW1 and SW2.
Answer: A
Q78. Refer to the exhibit. How will the redistributed routes on R1 from EIGRP into OSPF be installed in the R4 routing table?
A. as a default route with an E2 route type
B. as a default route with an IA route type
C. as specific routes with an E2 route type
D. as specific routes with an N2 route type
E. as a default route with an N2 route type
Answer: B
Explanation: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/6208-nssa.html http://www.cisco.com/image/gif/paws/6208/nssa.pdf
Q79. The product team at an ISP that offers VoIP services wants to add two-way video conferencing to their product offering. Which three QoS methods can be applied for real-time traffic on WAN links with speeds that are slower than 768 Kbps? (Choose three.)
A. Apply voice-adaptive fragmentation to ensure that large video packets are fragmented and interleaved.
B. Apply LLQ with video traffic that is dedicated in the priority queue.
C. Apply MLP link fragmentation and interleaving to the interface.
D. Apply CBWFQ with video traffic in its own class, which is marked with a PHB value of AF41.
E. Apply CBWFQ with VoIP traffic in its own class, which is marked with a PHB value of EF.
F. Apply LLQ with both voice traffic and video traffic in the same priority queue
Answer: C,D,E
Q80. Refer to the exhibit. R2 and R3 cannot install IS-IS IPv6 routes. What is the root cause?
A. R2 is missing the metric-style wide command under the IS-IS process.
B. R3 is missing the multi-topology transition command under the IS-IS address-family IPv6 process.
C. R2 is missing the multi-topology command under the IS-IS address-family IPv6 process.
D. R3 is missing the metric-style wide command under the IS-IS process.
Answer: B