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2016 Nov ccie dumps 400-101:

Q171. Which three statements describe the characteristics of a VPLS architecture? (Choose three.) 

A. It forwards Ethernet frames. 

B. It maps MAC address destinations to IP next hops. 

C. It supports MAC address aging. 

D. It replicates broadcast and multicast frames to multiple ports. 

E. It conveys MAC address reachability information in a separate control protocol. 

F. It can suppress the flooding of traffic. 

Answer: A,C,D 

Explanation: 

As a VPLS forwards Ethernet frames at Layer 2, the operation of VPLS is exactly the same as that found within IEEE 802.1 bridges in that VPLS will self learn source MAC address to port associations, and frames are forwarded based upon the destination MAC address. Like other 802.1 bridges, MAC address aging is supported. 

Reference: http://www.cisco.com/en/US/products/hw/routers/ps368/products_white_paper09186a0080 1f6084.shtml 


Q172. In the DiffServ model, which class represents the lowest priority with the highest drop probability? 

A. AF11 

B. AF13 

C. AF41 

D. AF43 

Answer:

Explanation: 

Assured Forwarding (AF) Behavior Group 

Class 1 

Class 2 

Class 3 

Class 4 

Low Drop 

AF11 (DSCP 10) 

AF21 (DSCP 18) 

AF31 (DSCP 26) 

AF41 (DSCP 34) 

Med Drop 

AF12 (DSCP 12) 

AF22 (DSCP 20) 

AF32 (DSCP 28) 

AF42 (DSCP 36) 

High Drop 

AF13 (DSCP 14) 

AF23 (DSCP 22) 

AF33 (DSCP 30) 

AF43 (DSCP 38) 

Reference: http://en.wikipedia.org/wiki/Differentiated_services 


Q173. Refer to the exhibit. 

The spokes of the DMVPN with the given configuration are having QoS issues. 

Which two actions can you take to resolve the problem? (Choose two.) 

A. Configure qos pre-classify on the tunnel interface. 

B. Configure an NHRP group on the tunnel interface and associate it to a QoS policy. 

C. Modify the configuration of the IPsec policy to accept QoS policies. 

D. Manually configure a QoS policy on the serial interface. 

E. Configure the bandwidth statement on the tunnel interface. 

F. Configure the bandwidth statement on the serial interface. 

Answer: A,B 

Explanation: 

It is possible to classify based on information that is encrypted, which is needed in this example. You can use an access-list, configured to match the private subnet behind the remote spoke. The qos pre-classify command is used on the tunnel interface, and is required because the traffic is classified by a parameter that is encrypted as the traffic leaves the physical outbound interface. L4 information from the IP data packet can also classify traffic destined to the same private subnet. The “nhrp map group group-name service-policy output parent-policy-name” command adds the NHRP group to the QoS policy map on the hub. 


Q174. Refer to the exhibit. 

Which part of the joined group addresses list indicates that the interface has joined the EIGRP multicast group address? 

A. FF02::1 

B. FF02::1:FF00:200 

C. FF02::A 

D. FF02::2 

Answer:

Explanation: 

FF02::A is an IPv6 link-local scope multicast addresses. This address is for all devices on a wire that want to "talk" EIGRP with one another. 

Focusing specifically on FF02::A and how routers join it, we can see and say three things: 

. Local: FF02::A is local to the wire. 

. Join: Each device "joins" FF02::A by just "deciding to listen" to the IPv6 link-local scope multicast address FF02::A. Then, by extension, it listens to the corresponding MAC address for that multicast IPv6 address (33:33:00:00:00:0A). 

. Common interest: As we can see, these varying groups have something in common that they would all like to hear about. For FF02::A, the common interest --the "connection" among the devices joining that group – is that they all want to listen to or participate in EIGRP. 

Reference: http://www.networkcomputing.com/networking/understanding-ipv6-what-is-solicited-node-multicast/a/d-id/1315703 


Q175. Which two statements are true about RSTP? (Choose two.) 

A. By default, RTSP uses a separate TCN BPDU when interoperating with 802.1D switches. 

B. By default, RTSP does not use a separate TCN BPDU when interoperating with 802.1D switches. 

C. If a designated port receives an inferior BPDU, it immediately triggers a reconfiguration. 

D. By default, RTSP uses the topology change TC flag. 

E. If a port receives a superior BPDU, it immediately replies with its own information, and no reconfiguration is triggered. 

Answer: B,D 

Explanation: 

The RSTP does not have a separate topology change notification (TCN) BPDU. It uses the topology change (TC) flag to show the topology changes. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_9_ea1/configuration/guide/scg/swmstp.html 


Renew ccie written dumps 400-101:

Q176. How is the MRU for a multilink bundle determined? 

A. It is negotiated by LCP. 

B. It is manually configured on the multilink bundle. 

C. It is manually configured on all physical interfaces of a multilink bundle. 

D. It is negotiated by NCP. 

E. It is negotiated by IPCP. 

Answer:


Q177. Which two message types allow PIM snooping to forward multicast traffic? (Choose two.) 

A. hello messages 

B. leave messages 

C. membership query messages 

D. bidirectional PIM DF election messages 

Answer: A,D 


Q178. Refer to the exhibit. 

If a connection failure occurs between R1 and R2, which two actions can you take to allow CR-1 to reach the subnet 192.168.192.0/24 on R2? (Choose two.) 

A. Create a static route on R1 for subnet 192.168.192.0/24 towards R3 and redistribute it into OSPF. 

B. Turn up a BGP session between CR-1 and R1. 

C. Create a static route on R1 for subnet 192.168.192.0/24 towards R3 and redistribute it into BGP. 

D. Turn up an EIGRP session between R1 and R3 with AS 65535. 

E. Create an OSPF virtual link between CR-1 and R2 to bypass R1. 

Answer: A,B 


Q179. Which two statements about SNMP are true? (Choose two.) 

A. SNMPv3 provides privacy and access control. 

B. All SNMP versions use get, getNext, and getBulk operations. 

C. SNMPv3 uses encrypted community strings. 

D. SNMPv1 and SNMPv2c use plaintext community strings. 

E. All SNMP versions support bulk retrieval and detailed error messages. 

Answer: A,B 


Q180. Which term describes an EIGRP route that has feasible successors? 

A. active 

B. passive 

C. redistributed 

D. invalid 

Answer:

Explanation: 

A topology table entry for a destination can have one of two states. A route is considered in the Passive state when a router is not performing a route recomputation. The route is in Active state when a router is undergoing a route recomputation. If there are always feasible successors, a route never has to go into Active state and avoids a route recomputation. 

When there are no feasible successors, a route goes into Active state and a route recomputation occurs. A route recomputation commences with a router sending a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that they are performing a route recomputation. While in Active state, a router cannot change the next-hop neighbor it is using to forward packets. Once all replies are received for a given query, the destination can transition to Passive state and a new successor can be selected. 

Reference: http://docwiki.cisco.com/wiki/Enhanced_Interior_Gateway_Routing_Protocol 


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