Cisco 400-201 Braindumps 2021

NEW QUESTION 1
DRAG DROP
Drag and drop the Timing Protocol characteristics on the left onto the correct Timing over Packet Solution on the right

Answer:

Explanation: Network Time Protocol : The most recent version introduced accuracy to the terms of microseconds and includes an extensibility mechanism
Precision Time Protocol : It defined a protocol for precise, real-time, network-wide synchronizaton accuracy in the sub millisecond range
Synchronous Ethernet : It provides accurate frequency synchronization, but does not provide time/phase synchronization
Time over IP connection and transfer of clock BOF: It was written to provide a roubust IP/MPLS-based time and frequency distribution architecture

NEW QUESTION 2
Refer to the exhibit.

An MPLS VPN service has been provisioned for an ABC customer. Based on the output from the VRF BGP configuration of PE1 and PE2, which statement describes the route exchange between ABC site 1 and site 2?

• A. Only CE1 will be able to install CE2 BGP updates in its BGP table.
• B. Only CE2 will be able to install CE1 BGP updates in its BGP table.
• C. CE1 can install the CE2 subnets in its BGP table and CE2 can install the CE1 subnets its BGP table.
• D. CE1 cannot install the CE2 subnets in its BGP table and CE2 cannot install the CE1 subnets its BGP table.
• E. "as-override" feature cannot be used in this scenario.

Answer: A

NEW QUESTION 3

Refer to the exhibit. The topology is an inter-AS VPN that is using Option B. Given the traceroute output from CE1 to CE2 .Which three options are VPN labels? (Choose two)

• A. Label 17 for LSP 1
• B. Label 21 for LSP 1
• C. Label 24 for LSP 1
• D. Label 17 for LSP 2
• E. Label 20 for LSP 2
• F. Label 21 for LSP 2
• G. Label 17 for LSP 3
• H. Label 20 for LSP 3

Answer: BCH

NEW QUESTION 4
Where is the MPLS label imposed?

• A. after the Layer 3 header and before the Layer 2 payload
• B. after the Layer 3 header and before the Layer 4 payload
• C. after the Layer 2 header and before the Layer 1 payload
• D. after the Layer 1 header and before the Layer 2 payload
• E. after the Layer 2 header and before the Layer 3 payload

Answer: E

NEW QUESTION 5
Which type of IPv6 address does OSPFv3 use to communicate with OSPFv3 neighbors?

• A. link-local
• B. site-local
• C. global
• D. unique local
• E. anycast

Answer: A

NEW QUESTION 6

Refer to the exhibit. The requirements is to copy traffic from switch A and switch B and to send it to a probe connected to switch D across the routed network. Which technology meets this requirement?

• A. NetFlow v5
• B. ERSPAN
• C. NetFlow v9
• D. RSPAN

Answer: B

NEW QUESTION 7
MPLS LDP was configured on two Cisco IOS XR routers, but LDP was not established. Which two issues may cause this problem? (Choose two.)

• A. The access list is configured to block TCP port 646.
• B. The interface has not been placed under the MPLS LDP configuration.
• C. The access list is configured to block TCP port 711.
• D. MPLS LDP is always enabled by default in Cisco IOS XR.
• E. MPLS LDP has not been placed under the interface configuration.

Answer: AB

NEW QUESTION 8
DRAG DROP

Answer:

Explanation:

NEW QUESTION 9

Refer to the exhibit. Customer Y reported that internet traffic stopped for a few minute. The ISP ABC operation engineer identified that this occurred when ASBR1 router reloaded OSPF coverage faster than BGP. Which command prevent this happening?

• A. Graceful restart
• B. set-overload-bit on startup wait-for-bgp
• C. bfd min_rx 100 max_rx 100 multiplier 3
• D. max-metric router-lsa on startup 300

Answer: D

NEW QUESTION 10
Which two statements are correct?

• A. A VC type 5 transports a VLAN over MPLS.
• B. A VC type 4 tunnels an Ethernet port over MPLS.
• C. A VC type 5 tunnels an Ethernet port over MPLS.
• D. A VC type 4 transports a VLAN over MPLS.

Answer: CD

Explanation: VC Type 4 is used for Ethernet VLAN mode. VC Type 5 is used for Ethernet Port mode.

NEW QUESTION 11
A design engineer has a requirement to implement QoS with a high degree of granularity in traffic management on a service provider network. The QoS behavior must match these requirements
*Shape multiple queues to a single rate
*Specify the maximum transmission rate of a set traffic classes that are queued separately
*Shape the aggregate traffic of queues on a physical interface
Which deployment meets these requirements ?

• A. RSVP
• B. LLQ
• C. CBWFQ with WRED
• D. hierarchical QoS

Answer: D

NEW QUESTION 12

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 down due to the ACL is applied on the PE2 interface
• B. The layer 2 tunnel is up and SW1 become the root bridge for VLAN 10
• C. The layer 2 tunnel is down due to the MTU mismatch between SW1 and SW2
• D. The layer 2 tunnel is up but no BPDUs are exchange unless an extra configuration is applied

Answer: B

NEW QUESTION 13
Which MQC-based output queueing method is designed to support multiple traffic classes including VoIP traffic, mission-critical traffic, bulk traffic, interactive traffic and default class traffic?

• A. Custom Queueing
• B. CB-WRED
• C. WRR Queueing
• D. LLQ
• E. CBWFQ

Answer: D

NEW QUESTION 14
Which of the following descriptions about uRPF loose mode is correct? (Choose two).

• A. It is typically used on point-to-point interfaces where the same interface is used for both directions of packet flows; if the source address has a return route in the FIB table, it is then checked against the adjacency table to ensure the same interface receiving the packet is the same interface used for the return path
• B. If a packet fails the uRPF loose mode check, the packet is then transmitted and creates a log message
• C. It is typically used on multipoint interfaces or on routers where asymmetrical routing is used (packets are received on one interface but the return path is not on the same interface); loose mode verifies a source address by looking in forwarding information base(FIB).
• D. If a packet fails the uRPF loose mode check, the packet is then dropped

Answer: CD

Explanation: When administrators use Unicast RPF in strict mode, the packet must be received on the interface that the router would use to forward the return packet. Unicast RPF configured in strict mode may drop legitimate traffic that is received on an interface that was not the router's choice for sending return traffic. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network.
When administrators use Unicast RPF in loose mode, the source address must appear in the routing table.
Administrators can change this behavior using the allow-default option, which allows the use of the default route in the source verification process. Additionally, a packet that contains a source address for which the return route points to the Null 0 interface will be dropped. An access list may also be specified that permits or denies certain source addresses in Unicast RPF loose mode.
Care must be taken to ensure that the appropriate Unicast RPF mode (loose or strict) is configured during the deployment of this feature because it can drop legitimate traffic. Although asymmetric traffic flows may be of concern when deploying this feature, Unicast RPF loose mode is a scalable option for networks that contain asymmetric routing paths.

NEW QUESTION 15
In inter-AS multicast, which two optional nontransitive path attributes were introduced in BGP to carry unicast and multicast routing information for RPF check at the AS borders? (Choose two.)

• A. MP_UNREACH_NLRI
• B. MP_REACH_NLRI
• C. FWDR_PREF Details
• D. MP_PERF_NLRI
• E. ORIGINATOR_ID

Answer: AB

NEW QUESTION 16
Which statement about Frame Relay is not true?

• A. Static mapping is used when the remote router does not support Inverse ARP.
• B. Frame Relay Inverse ARP requires LMI capability to construct an address to the DLCI mapping table on the router.
• C. Frame Relay Inverse ARP is disabled by default in Cisco IOS Software for all protocols that are enabled on the physical interface.
• D. Inverse ARP does not work when LMI is disabled.
• E. Frame Relay provides forward and backward congestion notification messages.

Answer: C

NEW QUESTION 17
Which two statements about 10 Gigabit Ethernet (10GE) are true? (Choose two.)

• A. 10 Gigabit Ethernet does not support VLAN definition
• B. 10 Gigabit Ethernet supports full duplex links, but does not support half duplex links.
• C. 10 Gigabit Ethernet supports unshielded or shielded twisted-pair cable connections
• D. 10 Gigabit Ethernet supports Carrier Sense Multiple Access with Collision Detection (CSMA/CD).
• E. 10 Gigabit Ethernet supports optical fiber connections in single mode onl
• F. Multi mode is not supported.

Answer: BC

NEW QUESTION 18
What are two uRPF working modes? (Choose two.)

• A. express mode
• B. safe mode
• C. loose mode
• D. strict mode
• E. tight mode

Answer: CD

NEW QUESTION 19
Which description is true about how remote IP fast Reroute addresses failures in the ring topologies?

• A. Routers establish a targeted LDP session with the furthest router that is in a PQ space, It requires an equal cost path to both edge ring routers
• B. Routers establish an MPLS TE tunnel with both ring edge routers
• C. Routers establish a targeted LDP session with the closest router that is in a PQ space
• D. Routers establish a GRE tunnel with the furthest PQ node in the ring
• E. Routers establish an MPLS TE tunnel with all PQ nodes in the ring
• F. Routers establish a GRE tunnel with the closest PQ node in the ring

Answer: C