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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Q31. 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. 


Q32. Which two statements describe characteristics of HDLC on Cisco routers? (Choose two.) 

A. It supports multiple Layer 3 protocols. 

B. It supports multiplexing. 

C. It supports only synchronous interfaces. 

D. It supports authentication. 

Answer: A,C 

Explanation: 

Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links using HDLC. Cisco HDLC also provides a simple control protocol called Serial Line Address Resolution Protocol (SLARP) to maintain serial link keepalives. Cisco HDLC is the default for data encapsulation at Layer 2 (data link) of the Open System Interconnection (OSI) stack for efficient packet delineation and error control. The absence of a protocol type field in the HDLC header posed a problem for links that carried traffic from more than one Layer 3 protocol. Cisco, therefore, added an extra Type field to the HDLC header, creating a Cisco-specific version of HDLC. Cisco routers can support multiple network layer protocols on the same HDLC link. For example an HDLC link between two Cisco routers can forward both IPv4 and IPv6 packets because the Type field can identify which type of packet is carried inside each HDLC frame. 

Reference: http://www.cisco.com/c/en/us/td/docs/routers/access/800/819/software/configuration/Guide/ 

819_SCG/6ser_conf.html#pgfId-1073734 


Q33. Which two statements about redistribution are true? (Choose two.) 

A. When BGP traffic is redistributed into OSPF, the metric is set to 1 unless the metric is defined. 

B. When EIGRP routes on a CE are redistributed through a PE into BGP, the Cost Community POI is set automatically. 

C. When OSPF traffic is redistributed into BGP, internal and external routes are redistributed. 

D. When BGP traffic is redistributed into OSPF, eBGP and iBGP routes are advertised. 

E. iBGP routes automatically redistribute into the IGP if the routes are in the routing table. 

F. When EIGRP traffic is redistributed into BGP, a default metric is required. 

Answer: A,B 


Q34. The no ip unreachables command is configured on interfaces to protect the control plane of a router. 

Which mechanism is impacted by using this command? 

A. ICMP redirects 

B. path MTU discovery 

C. source routing 

D. ICMP router discovery protocol 

Answer:


Q35. Which statement about how a CE router is used in an MPLS VPN is true? 

A. It is located on the customer premises, where it peers and exchanges routes with the provider edge router. 

B. It is located on the provider premises, where it peers and exchanges routes with the customer edge router. 

C. It is located on the customer premises, but it is fully controlled by the provider, which provides a full routing table to the customer. 

D. It is located on the provider premises, and it routes only MPLS label traffic. 

Answer:


Q36. Which three routing protocols utilize TLVs? (Choose three.) 

A. BGP 

B. IS-IS 

C. ODR 

D. OSPF 

E. EIGRP 

F. RIP 

Answer: A,B,E 

Explanation: 

IS-IS, originally designed for Open System Interconnection (OSI) routing, uses TLV parameters to carry information in Link State Packets (LSPs). The TLVs make IS-IS extendable. IS-IS can therefore carry different kinds of information in the LSPs. Several routing protocols use TLVs to carry a variety of attributes. Cisco Discovery Protocol (CDP), Label Discovery Protocol (LDP), and Border Gateway Protocol (BGP) are examples of protocols that use TLVs. BGP uses TLVs to carry attributes such as Network Layer Reachability Information (NLRI), Multiple Exit Discriminator (MED), and local pReference: The IP header of the EIGRP packet specifies IP protocol number 88 within it, and the maximum length of the packet will be the IP MTU of the interface on which it is transmitted, most of the time 1500 octets. Following the IP header is the various Type/Length/Value (TLV) triplets. These TLVs will not only carry the route entries but also provide fields for the management of the DUAL process, multicast sequencing, and IOS software versions from the router. 

References: http://www.cisco.com/c/en/us/support/docs/ip/integrated-intermediate-system-to-intermediate-system-is-is/5739-tlvs-5739.html http://ericleahy.com/index.php/eigrp-packets-neighborships/ 


Q37. DRAG DROP 

Drag and drop the VLAN number on the left to the corresponding default VLAN name on the right. 

Answer: 


Q38. Refer to the exhibit. 

Which route type is displayed when you enter the command show ip route supernets-only on a device with this configuration? 

A. Connected 

B. OSPF 

C. RIP 

D. EIGRP 

E. An empty route set 

Answer:

Explanation: 

This command shows supernets only; it does not show subnets. In this case, the routing table would contain the 10.0.0.0/24 subnet, but not the 10.0.0.0/8 supernet. 


Q39. DRAG DROP 

Drag and drop the RIP configuration command on the left to the function it performs on the right. 

Answer: 


Q40. 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. 


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