400-101 Guide

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  • Cisco
  • Exam Number/Code 400-101
  • Product Name CCIE Routing and Switching (v5.0)
  • Questions and Answers
  • 911 Q&As
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2016 Nov ccie pdf download:

Q551. Which statement about NAT64 is true? 

A. It uses one-to-one mapping between IPv6 addresses and IPv4 addresses. 

B. It requires static address mapping between IPv6 addresses and IPv4 addresses. 

C. It can be used to translate an IPv6 network to another IPv6 network. 

D. It can be configured for stateless and stateful translation. 

Answer:


Q552. Refer to the exhibit. 

If the network switch is configured as shown, which two statements about network traffic are true? (Choose two.) 

A. Traffic enters the shaper on a FIFO basis. 

B. Traffic enters the shaper on a weighted fair queueing basis. 

C. Drop behavior is random for traffic in excess of 6 Mbps. 

D. Voice traffic is given priority until it reaches 1.5 Mbps. 

E. Voice traffic is given priority until it reaches 6 Mbps. 

Answer: A,D 

Explanation: 

A. Serial interfaces at E1 (2.048 Mbps) and below use weighted fair queueing (WFQ) by default. Other interfaces use first-in first-out (FIFO) by default. 

D. Voice traffic is given priority up to 25% of the shape average value, which is 6000000, so 25% of 6 Mbps is 1.5 Mbps. 


Q553. How many address families can a single OSPFv3 instance support? 

A. 1 

B. 2 

C. 5 

D. 10 

Answer:


Q554. Which three statements about SPAN traffic monitoring are true? (Choose three.) 

A. Traffic from a non-source VLAN is discarded when it arrives on a source VLAN. 

B. Multiple sessions can send traffic to an individual destination port. 

C. It supports up to 32 SPAN ports per switch. 

D. The destination port acts as a normal switchport. 

E. It supports up to 64 SPAN ports per switch. 

F. Only one session can send traffic to an individual destination port. 

Answer: A,E,F 

Explanation: 

You can create up to a total of 64 SPAN and ERSPAN sessions to define sources and destinations on the local device.You can also create a SPAN session to monitor multiple VLAN sources and choose only VLANs of interest to transmit on multiple destination ports. 

For example, you can configure SPAN on a trunk port and monitor traffic from different VLANs on different destination ports. 

You can configure a particular destination port in only one SPAN session. 

Traffic from a non-source VLAN is discarded when it arrives on a source VLAN. 

Reference: 

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0/troubleshooti 

ng/configuration/guide/n1000v_troubleshooting/trouble_15span.html 


Q555. What are two advantages to using Asynchronous mode instead of Demand mode for BFD? (Choose two.) 

A. Asynchronous mode requires half as many packets as Demand mode for failure detection. 

B. Asynchronous mode can be used in place of the echo function. 

C. Asynchronous mode supports a larger number of BFD sessions. 

D. Asynchronous mode requires one fourth as many packets as Demand mode for failure detection. 

E. Asynchronous mode’s round-trip jitter is less than that of Demand mode. 

Answer: A,B 

Explanation: 

Pure Asynchronous mode is advantageous in that it requires half as many packets to achieve a particular Detection Time as does the Echo function. It is also used when the Echo function cannot be supported for some reason. 

Reference: https://tools.ietf.org/html/rfc5880 


Abreast of the times ccie dumps 400-101:

Q556. Which three factors does Cisco PfR use to calculate the best exit path? (Choose three.) 

A. quality of service 

B. packet size 

C. delay 

D. loss 

E. reachability 

F. administrative distance 

Answer: C,D,E 

Explanation: 

Cisco PfR selects an egress or ingress WAN path based on parameters that affect application performance, including reachability, delay, cost, jitter, and Mean Opinion Score (MOS). 

Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/performance-routing-pfr/product_data_sheet0900aecd806c4ee4.html 


Q557. DRAG DROP 

Drag and drop the OSPF network type on the left to the correct traffic type category on the right. 

Answer: 


Q558. Refer to the exhibit. 

Which OSPFv3 routes will be visible in the routing table of R2? 

A. 2001:12::1/128 

B. 2001:12::1/128, 2001:112::1/128 

C. 2001:12::2/128 

D. No OSPFv3 routes will be visible. 

Answer:

Explanation: 

The command “ipv6 unicast-routing” needs to be configured on both routers before any IPv6 routes will be seen. 


Q559. Which Cisco IOS XE process administers routing and forwarding? 

A. Forwarding manager 

B. Interface manager 

C. Cisco IOS 

D. Host manager 

Answer:

Explanation: 

Some of the processes are listed in the table below: 

Process 

Purpose 

Affected FRUs 

SubPackage Mapping 

Host Manager 

Provides an interface between the IOS process and many of the information-gathering functions of the underlying platform kernel and operating system. 

RP (one instance per RP) 

SIP (one instance per SIP) 

ESP (one instance per ESP) 

RPControl 

SIPBase 

ESPBase 

Interface Manager 

Provides an interface between the IOS process and the per-SPA interface processes on the SIP. 

RP (one instance per RP) 

SIP (one instance per SIP) 

RPControl 

SIPBase 

IOS 

The IOS process implements all forwarding and routing features for the router. 

RP (one per software redundancy instance per RP). Maximum of two instances per RP. 

RPIOS 

Forwarding Manager 

Manages the downloading of configuration to each of the ESPs and the communication of forwarding plane information, such as statistics, to the IOS process. 

RP (one per software redundancy instance per RP). Maximum of two instances per RP. 

ESP (one per ESP) 

RPControl 

ESPBase 

Reference: http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg /Software_Packaging_Architecture.html 


Q560. Which technology facilitates dynamic tunnel establishment in DMVPN? 

A. CEF 

B. mGRE 

C. a dynamic routing protocol 

D. NHRP 

Answer:


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