400-101 Guide

400-101 Exam Royal Pack (In Stock.)

 
  • 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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The Secret of ccie 400 101

Ucertify offers free demo for 400 101 pdf exam. "CCIE Routing and Switching (v5.0)", also known as ccie 400 101 dumps exam, is a Cisco Certification. This set of posts, Passing the Cisco 400 101 ccie exam, will help you answer those questions. The 400 101 dumps Questions & Answers covers all the knowledge points of the real exam. 100% real Cisco 400 101 ccie exams and revised by experts!

Q151. Refer to the exhibit. 

All switches have default bridge priorities, and originate BPDUs with MAC addresses as indicated. The numbers shown are STP link metrics. Which two ports are in blocking state after STP converges? (Choose two.) 

A. the port on switch SWD that connects to switch SWE 

B. the port on switch SWF that connects to switch SWG 

C. the port on switch SWD that connects to switch SWC 

D. the port on switch SWB that connects to switch SWD 

Answer: C,D 

Explanation: 

This is a scenario that wants you to demonstrate understanding of the Root switch and Root port election process. So, it’s best to start with where the root switch will be and work down from there. It’s setup nicely because the lowest MAC address switch starts at the top and then the lower priority/higher mac addresses move down the architecture. SWA wins the root election and of course all ports in SWA are forwarding. SWB introduces the possibility for a switching loop so it’s important to understand which ports will be put into the blocking state. Since SWD is a higher MAC address it will end up with a blocked port connected to SWB to prevent a loop: and this is one of the correct answers. To prevent the possibility of another potential switching loop, SWD again ends up with the higher MAC address so blocking the link between D and C prevents a B/C/D switching loop. 


Q152. Which statement is true about VPLS? 

A. MPLS is not required for VPLS to work. 

B. VPLS carries packets as Layer 3 multicast. 

C. VPLS has been introduced to address some shortcomings of OTV. 

D. VPLS requires an MPLS network. 

Answer:

Explanation: 

VPLS uses MPLS labels so an MPLS network is required. VPLS MPLS packets have a two-label stack. The outer label is used for normal MPLS forwarding in the service provider's network. If BGP is used to establish the VPLS, the inner label is allocated by a PE as part of a label block. If LDP is used, the inner label is a virtual circuit ID assigned by LDP when it first established a mesh between the participating PEs. Every PE keeps track of assigned inner label, and associates these with the VPLS instance. 

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


Q153. DRAG DROP 

Drag each traceroute text character on the left to its meaning on the right. 

Answer: 


Q154. On a network using RIPng, the prefix field of a routing table entry has a value of 0:0:0:0:0:0:0:0. What does this value signify? 

A. The next hop address is unknown. 

B. The next hop address is a site-local address. 

C. The neighboring router has IPv6 ND disabled. 

D. The next hop address must be the originator of the route advertisement. 

E. The associated route follows a default route out of the network. 

Answer:


Q155. Refer to the exhibit. 

Which type of BGP peer is 192.168.1.1? 

A. route reflector client 

B. iBGP 

C. confederation 

D. VPNv4 

Answer:


Q156. Refer to the exhibit. 

Which two statements about this egress queue are true? (Choose two.) 

A. The queue 3 buffer is allocated 20 percent, its drop threshold is 100 percent, and it is guaranteed 400 percent of memory. 

B. The queue 1 buffer is allocated 30 percent, its drop threshold is 25 percent, and it is guaranteed 100 percent of memory. 

C. The queue 1 buffer is allocated 30 percent, its drop threshold is 100 percent, and it is guaranteed 150 percent of memory. 

D. The queue 2 buffer is allocated 30 percent, its drop threshold is 200 percent, and it can use at maximum 400 percent of memory. 

E. The queue 3 buffer is allocated 30 percent, its drop threshold is 100 percent, and it can use at maximum 400 percent of memory. 

Answer: B,D 


Q157. Which two statements about the C-bit and PW type are true? (Choose two.) 

A. The C-bit is 1 byte and the PW type is 15 bytes. 

B. The PW type indicates the type of pseudowire. 

C. The C-bit is 3 bits and the PW type is 10 bits. 

D. The C-bit set to 1 indicates a control word is present. 

E. The PW type indicates the encryption type. 

Answer: B,D 

Explanation: 

The control word carries generic and Layer 2 payload-specific information. If the C-bit is set to 1, the advertising PE expects the control word to be present in every pseudowire packet on the pseudowire that is being signaled. If the C-bit is set to 0, no control word is expected to be present. Pseudowire Type—PW Type is a 15-bit field that represents the type of pseudowire. 

Reference: http://www.ciscopress.com/articles/article.asp?p=386788&seqNum=2 


Q158. The session status for an IPsec tunnel with IPv6-in-IPv4 is down with the error message IKE message from 10.10.1.1 failed its sanity check or is malformed. 

Which statement describes a possible cause of this error? 

A. There is a verification failure on the IPsec packet. 

B. The SA has expired or has been cleared. 

C. The pre-shared keys on the peers are mismatched. 

D. There is a failure due to a transform set mismatch. 

E. An incorrect packet was sent by an IPsec peer. 

Answer:

Explanation: 

IKE Message from X.X.X.X Failed its Sanity Check or is Malformed This debug error appears if the pre-shared keys on the peers do not match. In order to fix this issue, check the pre-shared keys on both sides. 1d00H:%CRPTO-4-IKMP_BAD_MESSAGE. IKE message from 150.150.150.1 failed its sanity check or is malformed. 

Reference: http://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/5409-ipsec-debug-00.html#ike 


Q159. Which two statements are true about OTV? (Choose two.) 

A. It relies on flooding to propagate MAC address reachability information. 

B. It uses a full mesh of point-to-multipoint tunnels to prevent head-end replication of multicast traffic. 

C. It can work over any transport that can forward IP packets. 

D. It supports automatic detection of multihoming. 

Answer: C,D 

Explanation: 

The overlay nature of OTV allows it to work over any transport as long as this transport can forward IP packets. Any optimizations performed for IP in the transport will benefit the OTV encapsulated traffic. As part of the OTV control protocol, automatic detection of multihoming is included. This feature enables the multihoming of sites without requiring additional configuration or protocols 

Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-574984.html 


Q160. Which two statements about reverse ARP are true? (Choose two.) 

A. Its servers require static mappings. 

B. It works with AutoInstall to configure new devices. 

C. It provides IP addresses for subnet masks. 

D. It provides IP addresses for default gateways. 

E. It requires less maintenance than DHCP. 

Answer: A,B 


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