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
  • Last Updated
  • Jun 18,2018
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2016 Nov latest ccie r&s dumps:

Q411. Refer to the exhibit. 

What does "(received-only)" mean? 

A. The prefix 10.1.1.1 can not be advertised to any eBGP neighbor. 

B. The prefix 10.1.1.1 can not be advertised to any iBGP neighbor. 

C. BGP soft reconfiguration outbound is applied. 

D. BGP soft reconfiguration inbound is applied. 

Answer:

Explanation: 

When you configure bgp soft-configuration-inbound, all the updates received from the neighbor will be stored unmodified, regardless of the inbound policy, and these routes appear as “(received-only).” 


Q412. What is the function of an implicit-null label? 

A. It notifies the upstream LSR to remove the top label in the label stack and forward the packet. 

B. It notifies the upstream LSR to add a VPN label to the label stack. 

C. It is used to statically assign a label to an IGP route. 

D. It is used to identify the router ID. 

Answer:


Q413. Refer to the exhibit. 

Which two statements about the R1 configuration are true? (Choose two.) 

A. The IP TTL value is copied to the MPLS field during label imposition. 

B. The structure of the MLPS network is hidden in a traceroute. 

C. The LDP session interval and hold times are configured for directly connected neighbors. 

D. R1 protects the session for 86400 seconds. 

E. All locally assigned labels are discarded. 

Answer: B,D 


Q414. Which two options are signaling protocols that are used in MPLS? (Choose two.) 

A. LDP 

B. RSVP 

C. BFD 

D. LISP 

E. CLNS 

F. CDP 

Answer: A,B 

Explanation: 

* Signaling is the means by which LSRs all along the path know that they are a part of a given LSP. It is a signaling function by which the LSR knows that the internal transit path for the LSP depicted goes from Interface 2 to Interface 4. 

* Label distribution is the means by which an LSR tells an upstream LSR what label value to use for a particular LSP. 

There are four protocols that can perform the label distribution function: 

* Label Distribution Protocol (LDP) 

* Resource Reservation Protocol with Traffic Engineering Extensions (RSVP-TE) 

* Constraint-Based Routed LDP (CR-LDP) 

* Multiprotocol BGP 

LDP and RSVP-TE are the two most commonly used label distribution protocols 

Reference: http://www.networkworld.com/article/2237487/cisco-subnet/understanding-mpls-label-distribution.html 


Q415. DRAG DROP 

Drag and drop the multicast protocol or feature on the left to the correct address space on the right. 

Answer: 


Most up-to-date cisco 400-101:

Q416. When VRF-Lite is configured without BGP support,.which statement about the configuration of the route target and route distinguisher is true? 

A. The configuration of the route target and route distinguisher is required. 

B. The configuration of the route target and route distinguisher is not required. 

C. The configuration of the route target is required and the configuration of the route distinguisher is not required. 

D. The configuration of the route target is not required and the configuration of the route distinguisher is required. 

Answer:


Q417. Refer to the exhibit. 

What kind of load balancing is done on this router? 

A. per-packet load balancing 

B. per-flow load balancing 

C. per-label load balancing 

D. star round-robin load balancing 

Answer:

Explanation: 

Here we can see that for the same traffic source/destination pair of 10.0.0.1 to 14.0.0.2 there were a total of 100 packets (shown by second entry without the *) and that the packets were distributed evenly across the three different outgoing interfaces (34, 33, 33 packets, respectively. 


Q418. Which statement about the function of poison reverse in EIGRP is true? 

A. It tells peers to remove paths that previously might have pointed to this router. 

B. It tells peers to remove paths to save memory and bandwidth. 

C. It provides reverse path information for multicast routing. 

D. It tells peers that a prefix is no longer reachable. 

Answer:

Explanation: 

Poison Reverse in EIGRP states: “Once you learn of a route through an interface, advertise it as unreachable back through that same interface”. For more information please read here. http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/16406-eigrp-toc.html#splithorizon. 


Q419. An engineer has configured a router to use EUI-64, and was asked to document the IPv6 address of the router. The router has the following interface parameters: 

mac address C601.420F.0007 

subnet 2001:DB8:0:1::/64 

A. 2001:DB8:0:1:C601:42FF:FE0F:7 

B. 2001:DB8:0:1:FFFF:C601:420F:7 

C. 2001:DB8:0:1:FE80:C601:420F:7 

D. 2001:DB8:0:1:C601:42FE:800F:7 

Answer:


Q420. Which option is the default maximum age of the MAC address table? 

A. 300 seconds 

B. 500 seconds 

C. 1200 seconds 

D. 3600 seconds 

Answer:

Explanation: 

To configure the maximum aging time for entries in the Layer 2 table, use the mac-address-table aging-time command in global configuration mode. 

Syntax Description 

seconds 

MAC address table entry maximum age. Valid values are 0, and from 5 to 1000000 seconds. Aging time is counted from the last time that the switch detected the MAC address. The default value is 300 seconds. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios/lanswitch/command/reference/lsw_book/lsw_m1. html 


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